Andorra Mobiland
United Arab Emirates Etisalat DU
Afghanistan Afghan Wireless Etisalat MTN Roshan
Antigua and Barbuda APUA Digicel Lime
Anguilla Digicel Lime
Albania AMC Eagle Mobile Plus Vodafone
Armenia Beeline Karabakh Telecom MTS Orange
Angola Movicel Unitel
Argentina Claro Movistar Personal
American Samoa Blue Sky Communications
Austria A1 Hutchison 3 Orange T-Mobile
Australia Hutchison 3 Norfolk Telecom Telstra Virgin Mobile Vodafone Yes Optus
Aruba Digicel Setar
Azerbaijan Azercell Bakcell Nar Mobile
Barbados Digicel Lime
Bangladesh Airtel Banglalink Grameenphone Robi Tele Talk
Belgium Mobistar Telenet
Bulgaria GLOBUL MTel
Bahrain BaTelCo Viva Zain
Bolivia, Plurinational State of Tigo
Brazil Brasil Telecom Claro Ctbc Cellular Oi Sercomtel TIM Vivo
Bahamas BaTelCo
Botswana Orange
Belarus Life MTS Velcom
Canada Bell Fido MTS Rogers SaskTel Telus Virgin Mobile
Central African Republic Orange
Switzerland Orange Sunrise Swisscom
Chile Claro Entel PCS TMC
Cameroon Orange
China China Unicom
Colombia Comcel Movistar Tigo
Costa Rica ICE
Cyprus KKTCell
Czech Republic O2 T-Mobile Vodafone
Germany E-Plus O2 T-Mobile Vodafone
Denmark 3 DK Call me TDC Telenor Telia
Dominica Lime
Dominican Republic Claro Orange
Algeria Djezzy Mobilis Nedjma
Ecuador Claro Movistar
Estonia EMT
Egypt Etisalat Mobinil Vodafone
Spain Movistar Orange Vodafone Yoigo
Finland Sonera DNA Elisa
France Bouygues Telecom Orange SFR Virgin Mobile
United Kingdom Hutchison 3 O2 Orange T-Mobile Tesco Mobile Virgin Mobile Vodafone Vodafone
Grenada Lime
Guinea Orange
Greece Cosmote Vodafone Wind
Guatemala Claro Movistar Tigo
Guam GTA
Hong Kong Three 3 1010 one2free SmarTone-Vodafone
Honduras Claro Tigo
Croatia T-Mobile VIPNet
Hungary T-Mobile Vodafone
Indonesia Telkomsel XL
Ireland eMobile Hutchison 3 Just Mobile Meteor O2 Postfone Tesco Mobile Vodafone
Israel Cellcom Orange Pelephone
India Aircel Airtel
Italy Three 3 TIM Vodafone
Jamaica Orange Zain
Japan SoftBank
Kenya Orange
Saint Kitts and Nevis Lime
Korea, Republic of (South Korea) olleh SK Telecom
Kuwait Viva Zain
Cayman Islands Lime
Saint Lucia Lime
Liechtenstein Orange Swisscom
Lithuania Omnitel
Luxembourg Orange LUXGSM Tango
Latvia LMT
Morocco Meditel
Moldova, Republic of Orange
Montenegro T-Mobile
Madagascar Orange
Macedonia, the former Yugoslav Republic of T-Mobile
Mali Orange
Macao Three 3 CTM SmarTone
Montserrat Lime
Malta Vodafone
Mauritius Orange
Mexico Movistar Telcel Iusacell
Malaysia Celcom DiGi Maxis
Niger Orange
Nicaragua Claro Movistar
Netherlands KPN T-Mobile Telfort Vodafone
Norway Netcom Network Norway Telenor Tele2
New Zealand Vodafone
Panama Claro Movistar
Peru Claro TM SAC
Philippines Globe
Poland Era Orange Play Plus T-Mobile
Portugal Optimus Vodafone TMN
Paraguay CTI Movil Tigo
Qatar Vodafone
Reunion Orange SFR
Romania Cosmote Digimobil Orange Vodafone
Russian Federation Beeline MTS
Saudi Arabia Mobily STC Saudi
Sweden Hutchison 3 Tele2 Telenor Telia
Singapore SingTel M1 StarHub
Slovenia Si.mobile
Slovakia Orange T-Mobile
Senegal Orange
El Salvador Claro Movistar Tigo
Turks and Caicos Islands Lime
Thailand AIS dtac TrueMove
Tunisia Orange
Turkey Avea TurkCell Vodafone
Trinidad and Tobago TSTT
Taiwan, Province of China Chunghwa Telecom FarEasTone Taiwan Mobile
Uganda Orange
United States AT&T Verizon T-Mobile
Uruguay CTI Movil Movistar
Saint Vincent and the Grenadines Lime
Venezuela, Bolivarian Republic of Digitel Movistar
Virgin Islands, British Lime
Viet Nam Viettel VinaPhone
South Africa Vodacom MTN
 |
Monday, July 18, 2011
Wednesday, May 11, 2011
How To Handle Water Damage Mobiles
Ever dropped your cell phone in the sink,? Did you ever leave it in your pocket and run it through the washer? It usually means you have to replace your phone, but sometimes if you're fast you can save the phone.
1. Remove the Battery. This is one of the most important steps. Don't take time to think about it, electricity and water do not mix. Cutting power to your phone is a crucial first step in saving it.
2. Dry your Phone. Obviously you need to remove as much of the water as soon as you can to prevent it from getting into the phone. Use a towel or a paper towel to remove as much of the water as possible.
3. Soak in Alcohol. Alcohol is hygroscopic (attracts water), it will dissolve all the water in the phone, which will then pour out of the phone with the alcohol. Any remaining alcohol will evaporate. Alcohol will not harm your phone but may mess up glue (from stickers and the like). Use 95% alcohol, not the regular 70% rubbing type. Do it outside!. If you use alcohol, do not follow the rest of the advice here, instead leave your phone outside for a day or two to dry.
4. Allow the phone to dry. Since you do not want to ruin your phone or lose all the numbers in your phone book, you need to allow the phone to dry. Don't try putting the battery back on to see if it works as this would risk damaging the phone with a short circuit. Leaving your phone in a bowl of dry rice will help to expedite moisture evaporation.
5. Heat your Phone. Apply enough heat to your phone to cause the water to evaporate without waterlogging your digital screen. One of the best things you can do to save a cell phone is to set it on the back of your computer monitor or TV screen over the heat vents. This is usually the perfect amount of heat to fix your phone. The convection action of the heat vents will help carry away the moisture in your phone. Leave the phone on the heat for at least 2-3 days. Another option is to leave it overnight in the oven on warm (make sure to take off the battery first).
6. Test your Phone. After you have waited 3 days, make sure everything is clean and dry looking and re-attach the battery to the phone and see if it works. If your phone does not work repeat step 4. If it still won't work, try taking your cell phone to an authorized dealer. Sometimes they can fix it.
Tips :
§ Don't put the battery on for at least 3 days or longer if your digital screen is foggy.
Place a piece of satin finish scotch tape over your water damage sticker before you drop your cell phone in the water to prevent the water damage sticker from voiding your warranty. This sticker can usually be found under your battery. It's a small round white sticker, possibly with dots on it. If this sticker gets wet it changes color and your phone is marked for water damage.
§ Remove the tape if you ever have to return your phone for repairs or warranty. (See the note in the 'Warnings' section about doing this!)
§ The best way to dry out your phone is to place it in front of an air conditioner or air conditioning vent. Cold air won't damage your phone (hot air can warp or in extreme cases even melt plastic), and air from an air conditioner is dry, and so will evaporate water faster than you might think (which is why a car air conditioner will de-mist the windshield so effectively, even if the engine hasn't warmed up yet). Warm air from a reverse-cycle air conditioner works even better, of course. If you dry your phone in this way overnight it should be fine by the morning.
§ Use a hairdryer set on warm; it won't melt your head so your phone should be safe.
§ Use a food dehydrator.
§ Use the oven on the warm setting (make sure to take out the battery)
Warnings :
§ Don't heat the battery or it could leak acid. If you use an oven or hairdryer, make sure to remove the battery first.
§ If you use alcohol make sure to do so outside, and do not apply heat in any form, not even the gentle heat of a monitor. Do not hook up the bettery till the alcohol smell dissipates.
§ Do not apply heat to your phone other than mentioned above. You don't want to melt or burn your phone.
§ Warranty fraud is naughty! If you dropped your phone in the can with your other 'droppings'--are you really going to send it in for a warranty tech to have to open? Yuck!
§ FYI, Most modern phones have more than one liquid damage indicator on them, only one visible to you (and sales/technician agents), and chances are, if the sticker under the battery is triggered (or would be, with the scotch tape trick), then the odds are that the internal stickers you can't access are tripped as well.
§ This will still result in you paying a voided-warranty fee in the long run, and it may be best to just learn from your mistake (and not make it more financially severe!).
§ Even if all these steps are followed, minerals dissolved in the water can recipitate on solder and component pins, causing corrosion or shorting. Components pins are packed so closely together in a modern cell phone that even a small encrustation can create a short, rendering the phone inoperable
1. Remove the Battery. This is one of the most important steps. Don't take time to think about it, electricity and water do not mix. Cutting power to your phone is a crucial first step in saving it.
2. Dry your Phone. Obviously you need to remove as much of the water as soon as you can to prevent it from getting into the phone. Use a towel or a paper towel to remove as much of the water as possible.
3. Soak in Alcohol. Alcohol is hygroscopic (attracts water), it will dissolve all the water in the phone, which will then pour out of the phone with the alcohol. Any remaining alcohol will evaporate. Alcohol will not harm your phone but may mess up glue (from stickers and the like). Use 95% alcohol, not the regular 70% rubbing type. Do it outside!. If you use alcohol, do not follow the rest of the advice here, instead leave your phone outside for a day or two to dry.
4. Allow the phone to dry. Since you do not want to ruin your phone or lose all the numbers in your phone book, you need to allow the phone to dry. Don't try putting the battery back on to see if it works as this would risk damaging the phone with a short circuit. Leaving your phone in a bowl of dry rice will help to expedite moisture evaporation.
5. Heat your Phone. Apply enough heat to your phone to cause the water to evaporate without waterlogging your digital screen. One of the best things you can do to save a cell phone is to set it on the back of your computer monitor or TV screen over the heat vents. This is usually the perfect amount of heat to fix your phone. The convection action of the heat vents will help carry away the moisture in your phone. Leave the phone on the heat for at least 2-3 days. Another option is to leave it overnight in the oven on warm (make sure to take off the battery first).
6. Test your Phone. After you have waited 3 days, make sure everything is clean and dry looking and re-attach the battery to the phone and see if it works. If your phone does not work repeat step 4. If it still won't work, try taking your cell phone to an authorized dealer. Sometimes they can fix it.
Tips :
§ Don't put the battery on for at least 3 days or longer if your digital screen is foggy.
Place a piece of satin finish scotch tape over your water damage sticker before you drop your cell phone in the water to prevent the water damage sticker from voiding your warranty. This sticker can usually be found under your battery. It's a small round white sticker, possibly with dots on it. If this sticker gets wet it changes color and your phone is marked for water damage.
§ Remove the tape if you ever have to return your phone for repairs or warranty. (See the note in the 'Warnings' section about doing this!)
§ The best way to dry out your phone is to place it in front of an air conditioner or air conditioning vent. Cold air won't damage your phone (hot air can warp or in extreme cases even melt plastic), and air from an air conditioner is dry, and so will evaporate water faster than you might think (which is why a car air conditioner will de-mist the windshield so effectively, even if the engine hasn't warmed up yet). Warm air from a reverse-cycle air conditioner works even better, of course. If you dry your phone in this way overnight it should be fine by the morning.
§ Use a hairdryer set on warm; it won't melt your head so your phone should be safe.
§ Use a food dehydrator.
§ Use the oven on the warm setting (make sure to take out the battery)
Warnings :
§ Don't heat the battery or it could leak acid. If you use an oven or hairdryer, make sure to remove the battery first.
§ If you use alcohol make sure to do so outside, and do not apply heat in any form, not even the gentle heat of a monitor. Do not hook up the bettery till the alcohol smell dissipates.
§ Do not apply heat to your phone other than mentioned above. You don't want to melt or burn your phone.
§ Warranty fraud is naughty! If you dropped your phone in the can with your other 'droppings'--are you really going to send it in for a warranty tech to have to open? Yuck!
§ FYI, Most modern phones have more than one liquid damage indicator on them, only one visible to you (and sales/technician agents), and chances are, if the sticker under the battery is triggered (or would be, with the scotch tape trick), then the odds are that the internal stickers you can't access are tripped as well.
§ This will still result in you paying a voided-warranty fee in the long run, and it may be best to just learn from your mistake (and not make it more financially severe!).
§ Even if all these steps are followed, minerals dissolved in the water can recipitate on solder and component pins, causing corrosion or shorting. Components pins are packed so closely together in a modern cell phone that even a small encrustation can create a short, rendering the phone inoperable
How You Repair A Dead China Phone:
First we need to know why a phone is dead-
1. For Software
2. For Hardware
1. For Software-
Flash is its final solution, but mtk cpu 90% phone done by format. if its MTK,SPD,AD, SI4904 cpu first try to format than try to full flash your phone with a good and perfect flash file. and other cpu haven't format option, so direct flash them. when you flash careful about original flash file version.
A. what you do before format or flash-
Always remember, before format or flash of your any china phone must first backup your current flash file if phone is dead, also do it. because it will help to find its original flash file version and many other.
B. What you need for flash or format a china phone-
(1) Connecting device (also your can do it with usb to serial cable but a device/box can give you full/final solution)
(2) Phone TX and RX.
(3) Need to know phone cpu type/model, flash chip type/model, Flash file version.
(4) For Flash need a good flash file which same to your phone original flash file version.
C. What problem you face for wrong flash file
(1) phone still dead
(2) white screen
(3) keypad not work
(4) phone hang after power on
(5) keep restarting
(6) no network
(7) etc.
Tool For MTK Flash info
2. For Hardware-
when a dead phone not possible to repair only with software you need to repair phone hardware.
Which hardware you need to check for dead phone-
(1) when you try to flash if phone not boot check power source/battery voltage/V+ pin in phone connector. just do confirm phone found enough voltage for software operation.
(2) if phone power source is ok but still not boot, do confirm your tx and rx is 100% working/tested.
(3) if tx rx is ok, than check your phone connector, its tx rx pin is confirm connect with cable and internal connector pin is joint on pcb perfectly.
(4) if pin is ok, maximum china phone tx rx going to cpu after crossing a resistor or capacitor so check them.
(5) if resistor is ok now you need to check boot diod, all phone have no boot diod so last try is check cpu tx rx pin.
(6) if boot is ok but phone not receive flash file, maximum time this problem coming from flash ic or ram (maximum china phone flash memory and ram have in one chip). so you need to try first re-hot it if still not solve change it.
but its true flash chip/ram always show error not only for them, sometimes cpu to flash chip/ram connection lost for bad cpu pin or bad cpu soldering on pcb. so check both of them.
(7) phone flash ok but not power on (although file is 100% correct) , for it you need to check
Flash chip/ram (95% include in 1 chip)
Clock crystal and battery
26mhz (near rf ic)
Rf ic,
Power ic and v+/b+ way
Bt ic
Last try is cpu.
1. For Software
2. For Hardware
1. For Software-
Flash is its final solution, but mtk cpu 90% phone done by format. if its MTK,SPD,AD, SI4904 cpu first try to format than try to full flash your phone with a good and perfect flash file. and other cpu haven't format option, so direct flash them. when you flash careful about original flash file version.
A. what you do before format or flash-
Always remember, before format or flash of your any china phone must first backup your current flash file if phone is dead, also do it. because it will help to find its original flash file version and many other.
B. What you need for flash or format a china phone-
(1) Connecting device (also your can do it with usb to serial cable but a device/box can give you full/final solution)
(2) Phone TX and RX.
(3) Need to know phone cpu type/model, flash chip type/model, Flash file version.
(4) For Flash need a good flash file which same to your phone original flash file version.
C. What problem you face for wrong flash file
(1) phone still dead
(2) white screen
(3) keypad not work
(4) phone hang after power on
(5) keep restarting
(6) no network
(7) etc.
Tool For MTK Flash info
2. For Hardware-
when a dead phone not possible to repair only with software you need to repair phone hardware.
Which hardware you need to check for dead phone-
(1) when you try to flash if phone not boot check power source/battery voltage/V+ pin in phone connector. just do confirm phone found enough voltage for software operation.
(2) if phone power source is ok but still not boot, do confirm your tx and rx is 100% working/tested.
(3) if tx rx is ok, than check your phone connector, its tx rx pin is confirm connect with cable and internal connector pin is joint on pcb perfectly.
(4) if pin is ok, maximum china phone tx rx going to cpu after crossing a resistor or capacitor so check them.
(5) if resistor is ok now you need to check boot diod, all phone have no boot diod so last try is check cpu tx rx pin.
(6) if boot is ok but phone not receive flash file, maximum time this problem coming from flash ic or ram (maximum china phone flash memory and ram have in one chip). so you need to try first re-hot it if still not solve change it.
but its true flash chip/ram always show error not only for them, sometimes cpu to flash chip/ram connection lost for bad cpu pin or bad cpu soldering on pcb. so check both of them.
(7) phone flash ok but not power on (although file is 100% correct) , for it you need to check
Flash chip/ram (95% include in 1 chip)
Clock crystal and battery
26mhz (near rf ic)
Rf ic,
Power ic and v+/b+ way
Bt ic
Last try is cpu.
How to repair keypad problem in china phone
First we need to know china phone keypad connected with PCB how way-
(A) Direct on PCB
(B) Flex System (flex cable direct soldering pcb to keypad panel)
(C) Flex and socket system include (flex one side soldering with key panel other side connect to pcb with socket)
(D) only Socket System (here have 2 socket, 1 with key panel others with pcb)
Keypad problem have various type-
1. All key not work.
2. some key work and some other not work.
3. sometimes work and sometimes not work.
1. All key not work
china phone all key not work for this type of problem-
(A) though its touch screen phone, first try to disconnect touch panel line from phone pcb or display flex (4 line)
(B) though not solve and keypad direct on pcb first you try to good clean full pcb with cleaner.
(C) though not solve now you try to format/flash your phone because some time key problem come from software problem.
(D) though still not solve now you check must be CPU. 95% china phone keypad directly going in cpu. and other 5% first going to resistor or capacitor near the cpu or keypad than going to cpu. so now first check them than you can try to re-hot, re-soldering or changing cpu.
(E) though its flex or socket system, first check GND connection continuslay pcb to key panel. next check full flex or socket all line going continuously pcb to key panel or not. also sometimes flex or socket shorted with other line or gnd so check also them.
(F) Also you can check all key anyone is short 2 line.
(G) sometimes keypad line broken from cpu pin on pcb to key panel, so check them.
2. Some key work and some other not work-
Some key work and some other is not work for this type of problem-
(A) maximum time this problem we face for flex or socket system keypad. so check flex cable and socket all line any line is broken or not and though need change them. and check all key connection on key panel.
(B) though its direact on pcb, some of key line broken internaly. and maximum china phone have alternative test point near every key or with other key on keypad. so check them with multimeter and though need connect to not work key with near testpoint or other working key.
(C) common problem is keypad metal ball (which is short 2 line on key when we press) sometimes its damage for phone water damage or over key voltage, so clean them or change.
(D) also try to check line continuously from cpu to not working key.
3. sometimes work and sometimes not work-
this problem come from this defect-
(A) flex or socket system keypad any line is bad soldering or do lose contact. check them and
re-soldering or keep there line join with extra ware.
(B) for cpu bad soldering or cpu pin is broken. so re-hot or re-ball cpu.
I post here keypad common problem solution, hope it will help you to fixing your keypad problem.
(A) Direct on PCB
(B) Flex System (flex cable direct soldering pcb to keypad panel)
(C) Flex and socket system include (flex one side soldering with key panel other side connect to pcb with socket)
(D) only Socket System (here have 2 socket, 1 with key panel others with pcb)
Keypad problem have various type-
1. All key not work.
2. some key work and some other not work.
3. sometimes work and sometimes not work.
1. All key not work
china phone all key not work for this type of problem-
(A) though its touch screen phone, first try to disconnect touch panel line from phone pcb or display flex (4 line)
(B) though not solve and keypad direct on pcb first you try to good clean full pcb with cleaner.
(C) though not solve now you try to format/flash your phone because some time key problem come from software problem.
(D) though still not solve now you check must be CPU. 95% china phone keypad directly going in cpu. and other 5% first going to resistor or capacitor near the cpu or keypad than going to cpu. so now first check them than you can try to re-hot, re-soldering or changing cpu.
(E) though its flex or socket system, first check GND connection continuslay pcb to key panel. next check full flex or socket all line going continuously pcb to key panel or not. also sometimes flex or socket shorted with other line or gnd so check also them.
(F) Also you can check all key anyone is short 2 line.
(G) sometimes keypad line broken from cpu pin on pcb to key panel, so check them.
2. Some key work and some other not work-
Some key work and some other is not work for this type of problem-
(A) maximum time this problem we face for flex or socket system keypad. so check flex cable and socket all line any line is broken or not and though need change them. and check all key connection on key panel.
(B) though its direact on pcb, some of key line broken internaly. and maximum china phone have alternative test point near every key or with other key on keypad. so check them with multimeter and though need connect to not work key with near testpoint or other working key.
(C) common problem is keypad metal ball (which is short 2 line on key when we press) sometimes its damage for phone water damage or over key voltage, so clean them or change.
(D) also try to check line continuously from cpu to not working key.
3. sometimes work and sometimes not work-
this problem come from this defect-
(A) flex or socket system keypad any line is bad soldering or do lose contact. check them and
re-soldering or keep there line join with extra ware.
(B) for cpu bad soldering or cpu pin is broken. so re-hot or re-ball cpu.
I post here keypad common problem solution, hope it will help you to fixing your keypad problem.
GET YOUR MOBILES IMEI INFORMATION
IMEI NO. IS UNIQUE CODE FOR YOUR MOBILE PHONES THAT IS IDENTITY OF YOUR MOBILE PHONE
IMEI IS WRITTEN ON BACK SIDE BODY BELOW THE BATTERY ONE MORE TRICK TO GET THEM IS
On the main screen type *#06#
Information you get from the IMEI (International Mobile Equipment Identity)
XXXXXX XX XXXXXX X
TAC FAC SNR SP
first two numbers are country code that is 35 means india
TAC = Type approval code of your nokia Mobile
FAC = Final assembly code of your cellphone
SNR = Serial number of your nokia Phone
SP = Spare
CHECK DETAILE ON ANY MOBILE PHONE
IMEI IS WRITTEN ON BACK SIDE BODY BELOW THE BATTERY ONE MORE TRICK TO GET THEM IS
On the main screen type *#06#
Information you get from the IMEI (International Mobile Equipment Identity)
XXXXXX XX XXXXXX X
TAC FAC SNR SP
first two numbers are country code that is 35 means india
TAC = Type approval code of your nokia Mobile
FAC = Final assembly code of your cellphone
SNR = Serial number of your nokia Phone
SP = Spare
CHECK DETAILE ON ANY MOBILE PHONE
Other secret tricks for Nokia mobile or cellphone
To check the phones Software revision for Nokia Mobile.
On the main screen type *#0000#
To enter in the secret menu in Nokia Phone.
On the main screen type *#92702689# [*#war0anty#]
It will take you to a secret menu where you may find some of the information below:
1. Displays Serial Number.
2. Displays the Month and Year of Manufacture
3. Displays (if there) the date where the phone was purchased (MMYY)
4. Displays the date of the last repair - if found (0000)
5. Shows life timer of phone (time passes since last start)
To restore Factory Settings for Nokia mobile
*#7780# reset to factory settings.
Taking picture without getting noticed.
Turn on/off the "click" sound made by the camera by selecting the 'Silent' profile or by turning warning tones on/off.
Hiding your Mobile/ Cellphone Number
Go to: Menu > Tools > Settings > Call > Send My Caller ID >
'Yes', 'No' or 'Set By Network' to follow the default settings of your home network.
It works only with very few network who provide you facility of “Private Number”
Speed Dialing From Simcard contact (not stored in mobile phonebook)
Type number followed by # then call.
Example: 1# or 2# or 21#
On the main screen type *#0000#
To enter in the secret menu in Nokia Phone.
On the main screen type *#92702689# [*#war0anty#]
It will take you to a secret menu where you may find some of the information below:
1. Displays Serial Number.
2. Displays the Month and Year of Manufacture
3. Displays (if there) the date where the phone was purchased (MMYY)
4. Displays the date of the last repair - if found (0000)
5. Shows life timer of phone (time passes since last start)
To restore Factory Settings for Nokia mobile
*#7780# reset to factory settings.
Taking picture without getting noticed.
Turn on/off the "click" sound made by the camera by selecting the 'Silent' profile or by turning warning tones on/off.
Hiding your Mobile/ Cellphone Number
Go to: Menu > Tools > Settings > Call > Send My Caller ID >
'Yes', 'No' or 'Set By Network' to follow the default settings of your home network.
It works only with very few network who provide you facility of “Private Number”
Speed Dialing From Simcard contact (not stored in mobile phonebook)
Type number followed by # then call.
Example: 1# or 2# or 21#
Friday, May 6, 2011
Future iOS Updates May Be Delivered Over the Air
The next major iOS upgrade - and it will be a hefty one - should propel the iDevice universe into iOS 5-land. Once iOS 5 is made available, subsequent software updates may be delivered to the iPhone over the air.
In this regard, however, Apple isn't ahead of the curve, it's actually playing catch-up. Given that a number of rival smartphones already offer over-the-air operating system updates, Apple will simply be striving to better compete with other handsets and technologies that, at present, are superior to Apple's iOS in some regards.
Quote:
Obviously, if this is a feature in iOS 5, it should conceivably make its way to iPad and iPod touches as well. That means iTunes may no longer be a needed conduit for updating iOS devices in the future. It would also mean that the iPad could finally be a stand alone device.
Of course, Apple would likely have to change to a considerable degree how frequently it delivers software updates - updates that will now have to come in much smaller download packages. After all, many of us had a chuckle at Engadget's jab at yesterday's release of iOS 4.3.3, which delivered a sizable 666.2 MB file to update iPhones to a version that only accomplishes the *quot;removal of things.*quot;
Source: 9to5Mac
'Paper iPhone' to Debut Next Week at the Computer Human Interaction Conference
Get ready for what could be a look into the future of smartphones - a distant look, that is. Next week at the Association for Computing Machinery's Computer Human Interaction conference in Vancouver, a remarkable prototype for what's been dubbed a *quot;paper iPhone*quot; will be demonstrated by its creator Roel Vertegaal, the director of Queen's University Human Media Lab.
According to published reports ahead of the formal May 10th unveiling of the PaperPhone - its actual name - the device is a
*quot;pocket-sized computer as thin and flexible as a sheet of paper is.*quot; Although a lone prototype of the smartphone presently exists, the ingenious researchers behind the invention say the smartphone could *quot;revolutionize the way we interact with computers.*quot;
Then again, if you think Apple products are sensitive to water damage now, just imagine the problems this little beauty would have. Nonetheless, the device in question *quot;is a flexible version of e-ink, the digital ink screen found in e-readers such as the Amazon Kindle.*quot; So advanced is the design, however, that it may take another five to ten years before a company - possibly Apple - could introduce it to the mass market.
*quot;This computer looks, feels and operates like a small sheet of interactive paper,” said Vertegaal. “You interact with it by bending it into a cell phone, flipping the corner to turn pages, or writing on it with a pen.*quot; Incredibly, a brief demo reel of the prototype already exists. To better understand the (possible) future of flexible smartphones, check out the clip posted above.
Source: MSNBC
According to published reports ahead of the formal May 10th unveiling of the PaperPhone - its actual name - the device is a
*quot;pocket-sized computer as thin and flexible as a sheet of paper is.*quot; Although a lone prototype of the smartphone presently exists, the ingenious researchers behind the invention say the smartphone could *quot;revolutionize the way we interact with computers.*quot;
Then again, if you think Apple products are sensitive to water damage now, just imagine the problems this little beauty would have. Nonetheless, the device in question *quot;is a flexible version of e-ink, the digital ink screen found in e-readers such as the Amazon Kindle.*quot; So advanced is the design, however, that it may take another five to ten years before a company - possibly Apple - could introduce it to the mass market.
*quot;This computer looks, feels and operates like a small sheet of interactive paper,” said Vertegaal. “You interact with it by bending it into a cell phone, flipping the corner to turn pages, or writing on it with a pen.*quot; Incredibly, a brief demo reel of the prototype already exists. To better understand the (possible) future of flexible smartphones, check out the clip posted above.
Source: MSNBC
Tuesday, April 19, 2011
Make Your Cellphone Fast & Stylish
Phone Model = Nokia 5800(RM-356) - Base F/W = Original V52.0.007
Phone Model = Nokia 5230(RM-588) - Base F/W = Original V40.6.003
Phone Model = Nokia 5530(RM-504) - Base F/W = Original V32.0.007
Phone Model = Nokia N97 (RM-505) - Base F/W =Original V22
Phone Model =Nokia X6 (RM-559) - Base F/W =Original V31.0.004
Languages: English
SYSTEM PERFORMANCE:
- System cache is set to C
- Maximum number of system cached entries increased
- Maximum size of sytem cache increased
- Camera will not leave in background after opening it to have constant RAM
- Messaging, Call Log, Calender, and Clock will not run in background after close them, to maintain RAM
- Max CPU time taken set to 50% for UI (save battery)
- Complexity of graphical effects now reduce to more simpliest and fastests
- Maximum cache size allocated for resources set to no limit
- System heap size doubled
- Default frame rate per seconds for UI set to 11fps (save battery)
- Battery draining issues were fixed by srbhvatsa (Thanks)
- Application close delay decreased
MODIFICATIONS:
- Nokia SMS Sending (My Nokia) Disabled
- Tapping Mode added: Shake to get phone silent/snooze Alarm and Calls
- Default bluetooth name: Fast * Stylish
- Number of message sent saved increase from 20 to 900 by default
- WiFi sensitivity increased and optimized
- FOTA reserved space romoved to get more space in C:\ (Phone Memory)
- RAM Cache in C:\ for better performance
- Super Fast Screen Rotation
- CPU load decreased (Get a very fast phone)
- Enabled lock/unlock vibration
- N8 Kinetic Scrolling
- Keylights fixed by mara (Thanks)
- Lock/Unlock single vibration set
- Disabled My Nokia Service
- Disable Useless Apps on Startup exept contacts
- Auto optimization of RAM cache for keeping up your phone faster even after heavy usage
- Default theme set to *quot;Fast * Stylish*quot;
- Default Fonts Used
- Delivery Reports ON by default in Messaging
- Theme effects ON by default
- *quot;Summary after call*quot; and *quot;speed dialing*quot; ON by default
- *quot;In call timer*quot; ON by default
- Light Sensor set to 75% and lights time-out set to 50 seconds by default
- Put your own startup.gif and startup.mp3 in E:\boot\ to get your own bootscreens and bootsound
- Homescreen landscape enabled.
- Lags in Messaging apps removed
- Radio RDS fix
- Auto lock keyboard Settings fixed
- Tv out fixed
- Restart on powerkey
HOMESCREEN:
- Widgeted Nokia C6 Homescreen
- Full widget support
- Added 3 new shortcut bars
- Swipe to unlock working even in landscape
- Check for software updates option removed in ***0000**
GRAPHICAL PERSONALISATIONS:
- Fast * Stylish Splashscreen
- Fast * Stylish Shutdown screen
- Mega Menu Mod by iepurasu_poznas
- Bootscreen volume set to: 9.0
- Light Intensity set to 75% light by default
- Theme Effects: high speed by iepurasu_poznas
- N8 swipe to unlock : Swipe=Red color Answer call=Yellow color by FuRCoM
INSTALLATION FEATURES:
- Java permission is set to default
- Real Hack (added modded installserver.exe)
- Secure Widget Preinstall (OVI Store Installer) will not run on first startup but will install at one click from menu icon
BROWSER:
- Some Important Bookmarks edited
- Nokia Useless Default Bookmark Folders Removed
- Download manager will be started on browser start-up to resume
- Browser now can be rotated in landscape even sensor off, by going to options while browsing
- Browser will prompt to continue download if there was a power failure
- Cache moved to E:\ and increased
FILE MANAGER:
- Nokia default file browser can send sisx, sis, jar and any protected items via bluetooth, mms and uploads
- Nokia default file browser will show system folders and root folder (Just enable ReadCroot.rmp Patch)
MULTIMEDIA:
- Nokia 5800 Stereo Codecs added for the best surround quality
- Camera sound is disabled if Capture tone**1 is used
- Camera will not leave in background after close it (SAVES RAM)
- Camera quality highly improved utilizing full 3.2 MP Camera
- Video Capture Quality improved to get High Detail Videos
- Voice recorder set to Standard quality
- Back Camera Bug *quot;Camera: Already in use*quot; Fixed by Gasper
- Voice recorder records upto 12 hours
- Camera Image improved
- Gallery Mod by me put your secret walls,videos and photos in E:/Wallpapers so that gallery will not read
- Gallery searching improved
- Video Capture frame rate increased
- Music Player will read E:\Music\
- Music player refresh faster
MENU:
- Using 3x4 Mega Menu with N8 icon by iepurasu_poznas(base by Binh24)
- All Lags in Menu removed
- Menu will hide application like: Conversations
- Working ovi sync and Notes
- Show Apps will remove in Menu Options
- 5 extra shortcuts
MESSAGING:
- Messages you had sent will save up to 900 messages
- Delivery reports will ON by default
- New email option has been fixed thanks tospinkol
- Message Reader fixed
- Added T9 Fixer from PNHT for languages addition
- QWERTY C5-03
- Auto Rotate QWERTY
THEMES:
- BoB (D)_IND190)
- Fast * Stylish (Symbian^3) Default
- Nokia N8 Orange by LA
- Sound Wave Removed
APPLICATIONS ADDED:
- RomPatcher+ (Removed Startup Note)
- Notifications v1.05
- KillMe(press long ZERO)
- Music Stoper
- BTSwitch
- Autoinstaller
- Conversation
APPLICATIONS ADDED IN Autoinstaller:
- BrightLight
- MemCheck
- NokiaBots
- Screensnap preconfigurated by me
- Slick
- Solitaire
- Xplore preconfigurated by me
- Musicplayeupdate 15.2
APPLICATIONS REMOVED:
- My Nokia
- QuickOffice fully removed
- AdobePDF fully removed
- ZipManager fully removed
- Welcome2
- About
- Chat
- NokiaFileBrowser
SMART FIRST BOOT AUTO OPTIMIZATIONS:
- FOTA reserved spaces in C: deleted: gain 5MB
- Autocretion of folders
- Cache folders in E:\
- E:\Boot
- E:\Sounds\Music
- E:\Music
- E:\thinkchange\c
- E:\thinkchange\e
- Auto copy of installation files to above locations
- Run Autoinstaller to quickly install pre-supplied applications
KillMe protected list: - Do set this after installing the firmware
-then select *quot;akncapserver*quot; and press options move to protected
-then select *quot;aknnfysrv*quot; and press options move to protected
-then select *quot;homescreen*quot; and press options move to protected
-then select *quot;sysap*quot; and press options move to protected
-then select *quot;telephone*quot; and press options move to protected
-then select *quot;peninputserver*quot; and press options move to protected
-then select *quot;killme*quot; and press options move to protected
- [optional] move *quot;popupclock*quot; to protected if you want the *quot;slideunlock*quot; feature,
if u dont want then leave it(ITS BETTER TO TERMINATE POPUPCLOCK,ITS RAM EATER AND BATTERY EATER)
AND SET TO AUTO KILL ON STARTUP
Very Important:
Formatting the card before you flash
Hard reset before you flash
Do not do a hard reset after flash
After flash in maximum 5 minutes phone will ask for restart!
Do not restore from a backup made on another CFW
Never take backup of Setting.
Backup Messages, Calendar and Notes
Do not backup contacts or else this will create a bug
Backup contacts by the following method
*Go to Contact -*gt; Option -*gt; Mark/Unmark -*gt; Mark All -*gt; Option -*gt; Copy business card -*gt; To other memory -*gt; E: Memory Card -*gt;
To restore your contacts do the following method
*Now after above step Go to Contact -*gt; Option -*gt; Copy business card -*gt;From other memory -*gt; E: Memory Card -*gt; press Select
CHANGE LOG FROM PREVIOUS VERSIONS :--
1- Add N8 Swipe To Unlock With N8 Swipe To Unlock Themes .
2- Add 4x4 Menu With My Organize
3- Successfully Updated Rom Patcher to v2.6 With Auto Start Function
4- Set Theme Effects On By Default (You Can Switch Off Manually)
5- Removed Start-up And Shutdown Picture And Sound For Faster Start-up
6- Add New Splash Screen Simple And Unique
7-Fixed Charging While Phone Switched Off Now Fully Working
8- Fixed Zoom Key In/Out In Camera Fully Working
9- Fixed Video Player Icons And Media Icons Now Is Fully Working
10- Add The Fastest Theme Effects You Will Never Met Before With I-phone Rotate And Fades Awy And In All Complies By Me
11- Dialer Now Works In Landscape Again
12- Call Log Now 365 Days Fully Working
13- Set Clock Digital By Default Now Fully Working
14- New Unique Font Hope You All Like It
15- Add Compass v1.2 Integrated In CFW
16- Add Qibla v1.2 Also Integrated And Please Don't Ask For Removing It As It's My Rights I Removed All The old Splash Screen As You Asked So Let Me Choice This App For My Country .
17- Cache Moved To E For Better Performance and More C Space
18- Swipe To Unlock Now Goes To Land Scape Mode
19- Add Restart Options Instead Of Lock Keypad And Now Switch Of Phone Is Working As Normal
20- Add Screen Snap v1.0 As So Many Asked
21- Add 2 new ringtones and 2 new alarm tones , 2 new messages tones
22- Improved Over All Performance And Boost Most Of It
23- Default Recorder Now Is Recording Till 16.3 Hours
Anything else connect me with sambd@live.com
Thursday, April 14, 2011
How to Check iPhone Baseband, Firmware Version and Other Details
Check Baseband and Firmware version for new iPhone
Here is what new iPhone buyers should do to know the baseband and firmware version of their devices:
Step 1: Turn the iPhone on.
Step 2: After you “Slide to unlock”, it will say “Emergency Calls Only”.
Step 3: Dial *3001**12345*** on iPhone and press “Call”.
Step 4: Your iPhone baseband will be shown. It will look like 04.26.08_G.
Check Baseband and Firmware version for used iPhone
If you are looking to purchase used iPhone and want to know the current firmware version and baseband of the device, follow the steps below:
On your iPhone, go to Settings*gt;General and tap on “About”.
Your device information will be displayed, you could see iPhone firmware version, baseband, network and other details related to device. Do note that iPhone baseband will be shown as “Modem Firmware”. Here is the list of information that will be shown.
Here is what new iPhone buyers should do to know the baseband and firmware version of their devices:
Step 1: Turn the iPhone on.
Step 2: After you “Slide to unlock”, it will say “Emergency Calls Only”.
Step 3: Dial *3001**12345*** on iPhone and press “Call”.
Step 4: Your iPhone baseband will be shown. It will look like 04.26.08_G.
Check Baseband and Firmware version for used iPhone
If you are looking to purchase used iPhone and want to know the current firmware version and baseband of the device, follow the steps below:
On your iPhone, go to Settings*gt;General and tap on “About”.
Your device information will be displayed, you could see iPhone firmware version, baseband, network and other details related to device. Do note that iPhone baseband will be shown as “Modem Firmware”. Here is the list of information that will be shown.
How to Identifying iPhone models
Products Affected
iPhone
Be sure you have the latest version of iTunes software. To check your iTunes version on a Mac, choose iTunes *gt; Check for Updates. In Windows, choose Help *gt; Check for Updates.
You can tell which iPhone model you have by navigating to Settings *gt; General *gt; About *gt; Model.
iPhone
You can easily identify iPhone by the metal case and the serial number etched on the back
iPhone 3G
You can distinguish iPhone 3G from iPhone by its plastic case. Additionally, the serial number is no longer on the back case imprint. You'll find the serial number for the iPhone 3G on the SIM tray. The imprint on the back of the phone has a faded look. Only the Apple logo is bright silver.
iPhone 3GS
You can distinguish iPhone 3GS from iPhone by its plastic case. Additionally, the serial number is no longer on the back case imprint. You'll find the serial number for the iPhone 3GS on the SIM tray. You can distinguish iPhone 3GS from iPhone 3G by the imprint on the back of the phone. The entire imprint on the back of iPhone 3GS is bright silver (not just the Apple logo).
iPhone
Be sure you have the latest version of iTunes software. To check your iTunes version on a Mac, choose iTunes *gt; Check for Updates. In Windows, choose Help *gt; Check for Updates.
You can tell which iPhone model you have by navigating to Settings *gt; General *gt; About *gt; Model.
iPhone
You can easily identify iPhone by the metal case and the serial number etched on the back
iPhone 3G
You can distinguish iPhone 3G from iPhone by its plastic case. Additionally, the serial number is no longer on the back case imprint. You'll find the serial number for the iPhone 3G on the SIM tray. The imprint on the back of the phone has a faded look. Only the Apple logo is bright silver.
iPhone 3GS
You can distinguish iPhone 3GS from iPhone by its plastic case. Additionally, the serial number is no longer on the back case imprint. You'll find the serial number for the iPhone 3GS on the SIM tray. You can distinguish iPhone 3GS from iPhone 3G by the imprint on the back of the phone. The entire imprint on the back of iPhone 3GS is bright silver (not just the Apple logo).
How to Identifying iPhone models
'Apple iphone 2g 3g 3gs Explained'
IPHONE 2G
:SILVER BACK CASING
:MEMORY CAPACITY 2 GIG,4 GIG,8 GIG AND 16 GIG
IPHONE 3G
:HARD PLASTIC BACK CASING WITH AVAIL COLORS ( BLACK AND WHITE )
:MEMORY CAPACITY 8 GIG AND 16 GIG ONLY
IPHONE 3GS
:HARD PLASTIC BACK CASING WITH AVAIL COLORS ( BLACK ONLY )
:MEMORY CAPACITY 32 GIG
:ALREADY ON 3.0 VERSION
IPHONE 2G
:SILVER BACK CASING
:MEMORY CAPACITY 2 GIG,4 GIG,8 GIG AND 16 GIG
IPHONE 3G
:HARD PLASTIC BACK CASING WITH AVAIL COLORS ( BLACK AND WHITE )
:MEMORY CAPACITY 8 GIG AND 16 GIG ONLY
IPHONE 3GS
:HARD PLASTIC BACK CASING WITH AVAIL COLORS ( BLACK ONLY )
:MEMORY CAPACITY 32 GIG
:ALREADY ON 3.0 VERSION
Monday, March 14, 2011
Nokia Model DCT1 DCT2 DCT3 DCT4 ,4+ BB5 etc List Hear
Nokia DCT-1
Nokia 1011 Nokia 1610 Nokia 1611 Nokia 1620 Nokia 1630 Nokia 1631 Nokia 2010 Nokia 2040 Nokia 2110 Nokia 2110i Nokia 2114 Nokia 2140 Nokia 2148 Nokia 2148i Nokia 2160 Nokia 2160i Nokia 2170 Nokia 2180 Nokia 2190 Nokia 9000 Nokia 9000i
Nokia DCT-2
Nokia 3110 Nokia 3110 PlusNokia 8110 Nokia 8110i Nokia 8146 Nokia 8148 Nokia 8148 (nk502)Nokia 8148i Nokia nk502
Nokia DCT-3
Nokia 2100 Nokia 3210 Nokia 3210 Nokia 3310 Nokia 3315 Nokia 3330 Nokia 3350 Nokia 3390 Nokia 3390 Nokia 3391 Nokia 3395 Nokia 3410 Nokia 3610 Nokia 5110 Nokia 5110i Nokia 5110i APACNokia 5120 Nokia 5125 Nokia 5130 Nokia 5160 Nokia 5170 Nokia 5170i Nokia 5180 Nokia 5180i Nokia 5185 Nokia 5185i Nokia 5190 Nokia 5210 Nokia 5510 Nokia 6080 Nokia 6081 Nokia 6090 Nokia 6091 Nokia 6110 Nokia 6120 Nokia 6120i Nokia 6130 Nokia 6138 Nokia 6150 Nokia 6160 Nokia 6161 Nokia 6162 Nokia 6180 Nokia 6185 Nokia 6185i Nokia 6188 Nokia 6190 Nokia 6210 Nokia 6250 Nokia 7110 Nokia 7160 Nokia 7190 Nokia 8210 Nokia 8250 Nokia 8260 Nokia 8265 Nokia 8265i Nokia 8270 Nokia 8280 Nokia 8280i Nokia 8290 Nokia 8810 Nokia 8850 Nokia 8855 Nokia 8860 Nokia 8890 Nokia 9110 Nokia 9110i
Nokia DCT-L(inda) [Communicator]
Nokia 9210 CommunicatorNokia 9210 CommunicatorNokia 9210i CommunicatorNokia 9290 CommunicatorNokia 9300 (APE)Nokia 9300 (APE)Nokia 9300i (APE)Nokia 9500 Communicator (APE)Nokia 9500 Communicator (APE)
Nokia DCT-4
Nokia 1100 Nokia 1100 Nokia 1101 Nokia 1108 Nokia 1110 Nokia 1110 Nokia 1110i Nokia 1112 Nokia 1112 Nokia 1112i Nokia 12i GSM ModulNokia 1600 Nokia 1600 Nokia 2112 Nokia 2125i Nokia 2126i Nokia 2128i Nokia 2255 Nokia 2300 Nokia 2300 Nokia 2355 Nokia 2600 Nokia 2650 Nokia 2651 Nokia 2652 Nokia 2760 AmericasNokia 2760 Europe/AsiaNokia 30 TerminalNokia 3100 Nokia 3105 Nokia 3108 Nokia 3120 Nokia 3120 Nokia 3125 Nokia 3128 Nokia 3129 Nokia 3152 Nokia 3155 Nokia 3155i Nokia 3200 Nokia 3205 Nokia 3205i Nokia 3220 Nokia 3220 Nokia 3230 (WD2)Nokia 3300 Nokia 3300 Nokia 3320 Nokia 3321 Nokia 3360 Nokia 3361 Nokia 3510 Nokia 3510i Nokia 3520 Nokia 3530 Nokia 3560 Nokia 3570 Nokia 3585 Nokia 3586 Nokia 3586i Nokia 3587 Nokia 3587i Nokia 3588i Nokia 3589i Nokia 3590 Nokia 3595 Nokia 3595i Nokia 3600 (WD2)Nokia 3620 (WD2)Nokia 3650 (WD2)Nokia 3660 (WD2)Nokia 5070 Nokia 5070 Nokia 5100 Nokia 5140 Nokia 5140 Nokia 5140i Nokia 6010 Nokia 6012 Nokia 6015 Nokia 6015i Nokia 6016i Nokia 6019i Nokia 6020 Nokia 6020 Nokia 6021 Nokia 6030 Nokia 6030 Nokia 6050 Nokia 6060 Nokia 6060 Nokia 6061 Nokia 6070 Nokia 6070 Nokia 6080 Nokia 6080 Nokia 610 Car KitNokia 6100 Nokia 6101 Nokia 6101 Nokia 6101 Nokia 6102 Nokia 6102 Nokia 6102 Nokia 6102 Nokia 6103 Nokia 6103 Nokia 6108 Nokia 6111 Nokia 6112 Nokia 6152 Nokia 6155 Nokia 6155i Nokia 616 Car KitNokia 6170 (TIKU)Nokia 6170 (TIKU)Nokia 6200 Nokia 6220 Nokia 6225 Nokia 6225i Nokia 6230 (TIKU)Nokia 6230 (TIKU)Nokia 6230i (TIKU)Nokia 6235 (TIKU)Nokia 6235i (TIKU)Nokia 6236i Nokia 6255 (TIKU)Nokia 6255i (TIKU)Nokia 6256 Nokia 6256i Nokia 6260 (WD2)Nokia 6260 (WD2)Nokia 6310 Nokia 6310i Nokia 6340 Nokia 6340i Nokia 6360 Nokia 6370 Nokia 6385 Nokia 6500 Nokia 6510 Nokia 6560 Nokia 6585 Nokia 6590 Nokia 6590i Nokia 6600 (WD2)Nokia 6610 Nokia 6610i Nokia 6620 (APE)Nokia 6650 Nokia 6651 Nokia 6670 (WD2)Nokia 6670 (WD2)Nokia 6800 Nokia 6800 Nokia 6810 Nokia 6820 Nokia 6820 Nokia 6820i Nokia 6822 Nokia 6822 Nokia 7200 Nokia 7210 Nokia 7250 Nokia 7250i Nokia 7260 Nokia 7270 (TIKU)Nokia 7270 (TIKU)Nokia 7280 (TIKU)Nokia 7280 (TIKU)Nokia 7360 Nokia 7380 Nokia 7600 (TIKU)Nokia 7610 (WD2)Nokia 7610 (WD2)Nokia 7620 Nokia 7650 (WD2)Nokia 7700 (APE)Nokia 7710 (APE)Nokia 810 Car KitNokia 8310 Nokia 8390 Nokia 8587 Nokia 8800 (TIKU)Nokia 8800 Sirocco Edition (TIKU)Nokia 8801 (TIKU)Nokia 8910 Nokia 8910i Nokia D211 Nokia N-Gage (WD2)Nokia N-Gage QD (WD2)Nokia Remote Camera
DCT-4+ (Plus)
Nokia 1200 Nokia 1208 Nokia 1208b Nokia 1209 Nokia 1650 Nokia 1650b Nokia 1680c-2b ClassicNokia 2310 Nokia 2600c Nokia 2610 Nokia 2610b Nokia 2626 Nokia 2630 AmericasNokia 2630 Europe/AsiaNokia 2670h FoldNokia 5000 Nokia 5000 Nokia 7070
BB5.0
Nokia 3109 ClassicNokia 3109 ClassicNokia 3110 ClassicNokia 3120 ClassicNokia 3250 Nokia 3500 ClassicNokia 3500 ClassicNokia 3600 SlideNokia 3610 Nokia 5200 Nokia 5200 Nokia 5220 XpressMusicNokia 5220 XpressMusicNokia 5300 XpressMusicNokia 5300 XpressMusicNokia 5310 XpressMusicNokia 5310 XpressMusicNokia 5320 XpressMusicNokia 5320 XpressMusicNokia 5320 XpressMusicNokia 5500 Nokia 5500 SportNokia 5610 XpressMusicNokia 5610 XpressMusicNokia 5700 XpressMusicNokia 5700 XpressMusicNokia 5710 XpressMusicNokia 5710 XpressMusicNokia 6085 Nokia 6085 Nokia 6086 Nokia 6110 NavigatorNokia 6110 NavigatorNokia 6120 ClassicNokia 6120 ClassicNokia 6121 ClassicNokia 6124 VodafoneNokia 6125 Nokia 6126 Nokia 6126 Nokia 6131 Nokia 6131 NFCNokia 6133 Nokia 6133 Nokia 6133 Nokia 6135 Nokia 6136 Nokia 6136 Nokia 6151 Nokia 6210 NavigatorNokia 6210 NavigatorNokia 6210 NavigatorNokia 6210 NavigatorNokia 6212 ClassicNokia 6220 ClassicNokia 6220 ClassicNokia 6233 Nokia 6233 Nokia 6234 Nokia 6267 Nokia 6270 Nokia 6280 Nokia 6282 Nokia 6288 Nokia 6290 Nokia 6300 Nokia 6300 Nokia 6300i Nokia 6301 Nokia 6301 Nokia 6500 ClassicNokia 6500 ClassicNokia 6500 SlideNokia 6500 SlideNokia 6555 Nokia 6555 ClassicNokia 6556 ClassicNokia 6600 FoldNokia 6600 SlideNokia 6630 Nokia 6631 (NM850iG)Nokia 6650 T-MobileNokia 6680 Nokia 6681 Nokia 6682 Nokia 7310 SupernovaNokia 7310 SupernovaNokia 7370 Nokia 7373 Nokia 7390 Nokia 7500 PrismNokia 7500 PrismNokia 7510 SupernovaNokia 7510 SupernovaNokia 7610 SupernovaNokia 7610 SupernovaNokia 7900 PrismNokia 8600 LunaNokia 8800 ArteNokia E50 Nokia E50 Nokia E51 Nokia E51 Nokia E60 Nokia E61 Nokia E61i Nokia E61i Nokia E62 Nokia E65 Nokia E66 Nokia E66 Nokia E66 Nokia E70 Nokia E70 Nokia E71 Nokia E71 Nokia E71 Nokia E90 CommunicatorNokia E90 CommunicatorNokia N70 Nokia N70 Nokia N71 Nokia N71 Nokia N72 Nokia N73 Nokia N73 Nokia N75 Nokia N76 Nokia N76 Nokia N77 Nokia N77 Nokia N77 Nokia N78 Nokia N78 Nokia N78 Nokia N79 Nokia N79 Nokia N79 Nokia N80 Nokia N80 Nokia N81 Nokia N81 Nokia N81 Nokia N81 Nokia N82 Nokia N82 Nokia N85 Nokia N85 Nokia N85 Nokia N90 Nokia N91 Nokia N91 Nokia N91 Nokia N91 Nokia N92 Nokia N92 Nokia N93 Nokia N93 Nokia N93i Nokia N93i Nokia N95 Nokia N95 8GBNokia N95 NAMNokia N95 8GB NAMNokia N95 Nokia N95 Nokia N96 Nokia N96 Nokia N96 Nokia NM705i
Nokia 1011 Nokia 1610 Nokia 1611 Nokia 1620 Nokia 1630 Nokia 1631 Nokia 2010 Nokia 2040 Nokia 2110 Nokia 2110i Nokia 2114 Nokia 2140 Nokia 2148 Nokia 2148i Nokia 2160 Nokia 2160i Nokia 2170 Nokia 2180 Nokia 2190 Nokia 9000 Nokia 9000i
Nokia DCT-2
Nokia 3110 Nokia 3110 PlusNokia 8110 Nokia 8110i Nokia 8146 Nokia 8148 Nokia 8148 (nk502)Nokia 8148i Nokia nk502
Nokia DCT-3
Nokia 2100 Nokia 3210 Nokia 3210 Nokia 3310 Nokia 3315 Nokia 3330 Nokia 3350 Nokia 3390 Nokia 3390 Nokia 3391 Nokia 3395 Nokia 3410 Nokia 3610 Nokia 5110 Nokia 5110i Nokia 5110i APACNokia 5120 Nokia 5125 Nokia 5130 Nokia 5160 Nokia 5170 Nokia 5170i Nokia 5180 Nokia 5180i Nokia 5185 Nokia 5185i Nokia 5190 Nokia 5210 Nokia 5510 Nokia 6080 Nokia 6081 Nokia 6090 Nokia 6091 Nokia 6110 Nokia 6120 Nokia 6120i Nokia 6130 Nokia 6138 Nokia 6150 Nokia 6160 Nokia 6161 Nokia 6162 Nokia 6180 Nokia 6185 Nokia 6185i Nokia 6188 Nokia 6190 Nokia 6210 Nokia 6250 Nokia 7110 Nokia 7160 Nokia 7190 Nokia 8210 Nokia 8250 Nokia 8260 Nokia 8265 Nokia 8265i Nokia 8270 Nokia 8280 Nokia 8280i Nokia 8290 Nokia 8810 Nokia 8850 Nokia 8855 Nokia 8860 Nokia 8890 Nokia 9110 Nokia 9110i
Nokia DCT-L(inda) [Communicator]
Nokia 9210 CommunicatorNokia 9210 CommunicatorNokia 9210i CommunicatorNokia 9290 CommunicatorNokia 9300 (APE)Nokia 9300 (APE)Nokia 9300i (APE)Nokia 9500 Communicator (APE)Nokia 9500 Communicator (APE)
Nokia DCT-4
Nokia 1100 Nokia 1100 Nokia 1101 Nokia 1108 Nokia 1110 Nokia 1110 Nokia 1110i Nokia 1112 Nokia 1112 Nokia 1112i Nokia 12i GSM ModulNokia 1600 Nokia 1600 Nokia 2112 Nokia 2125i Nokia 2126i Nokia 2128i Nokia 2255 Nokia 2300 Nokia 2300 Nokia 2355 Nokia 2600 Nokia 2650 Nokia 2651 Nokia 2652 Nokia 2760 AmericasNokia 2760 Europe/AsiaNokia 30 TerminalNokia 3100 Nokia 3105 Nokia 3108 Nokia 3120 Nokia 3120 Nokia 3125 Nokia 3128 Nokia 3129 Nokia 3152 Nokia 3155 Nokia 3155i Nokia 3200 Nokia 3205 Nokia 3205i Nokia 3220 Nokia 3220 Nokia 3230 (WD2)Nokia 3300 Nokia 3300 Nokia 3320 Nokia 3321 Nokia 3360 Nokia 3361 Nokia 3510 Nokia 3510i Nokia 3520 Nokia 3530 Nokia 3560 Nokia 3570 Nokia 3585 Nokia 3586 Nokia 3586i Nokia 3587 Nokia 3587i Nokia 3588i Nokia 3589i Nokia 3590 Nokia 3595 Nokia 3595i Nokia 3600 (WD2)Nokia 3620 (WD2)Nokia 3650 (WD2)Nokia 3660 (WD2)Nokia 5070 Nokia 5070 Nokia 5100 Nokia 5140 Nokia 5140 Nokia 5140i Nokia 6010 Nokia 6012 Nokia 6015 Nokia 6015i Nokia 6016i Nokia 6019i Nokia 6020 Nokia 6020 Nokia 6021 Nokia 6030 Nokia 6030 Nokia 6050 Nokia 6060 Nokia 6060 Nokia 6061 Nokia 6070 Nokia 6070 Nokia 6080 Nokia 6080 Nokia 610 Car KitNokia 6100 Nokia 6101 Nokia 6101 Nokia 6101 Nokia 6102 Nokia 6102 Nokia 6102 Nokia 6102 Nokia 6103 Nokia 6103 Nokia 6108 Nokia 6111 Nokia 6112 Nokia 6152 Nokia 6155 Nokia 6155i Nokia 616 Car KitNokia 6170 (TIKU)Nokia 6170 (TIKU)Nokia 6200 Nokia 6220 Nokia 6225 Nokia 6225i Nokia 6230 (TIKU)Nokia 6230 (TIKU)Nokia 6230i (TIKU)Nokia 6235 (TIKU)Nokia 6235i (TIKU)Nokia 6236i Nokia 6255 (TIKU)Nokia 6255i (TIKU)Nokia 6256 Nokia 6256i Nokia 6260 (WD2)Nokia 6260 (WD2)Nokia 6310 Nokia 6310i Nokia 6340 Nokia 6340i Nokia 6360 Nokia 6370 Nokia 6385 Nokia 6500 Nokia 6510 Nokia 6560 Nokia 6585 Nokia 6590 Nokia 6590i Nokia 6600 (WD2)Nokia 6610 Nokia 6610i Nokia 6620 (APE)Nokia 6650 Nokia 6651 Nokia 6670 (WD2)Nokia 6670 (WD2)Nokia 6800 Nokia 6800 Nokia 6810 Nokia 6820 Nokia 6820 Nokia 6820i Nokia 6822 Nokia 6822 Nokia 7200 Nokia 7210 Nokia 7250 Nokia 7250i Nokia 7260 Nokia 7270 (TIKU)Nokia 7270 (TIKU)Nokia 7280 (TIKU)Nokia 7280 (TIKU)Nokia 7360 Nokia 7380 Nokia 7600 (TIKU)Nokia 7610 (WD2)Nokia 7610 (WD2)Nokia 7620 Nokia 7650 (WD2)Nokia 7700 (APE)Nokia 7710 (APE)Nokia 810 Car KitNokia 8310 Nokia 8390 Nokia 8587 Nokia 8800 (TIKU)Nokia 8800 Sirocco Edition (TIKU)Nokia 8801 (TIKU)Nokia 8910 Nokia 8910i Nokia D211 Nokia N-Gage (WD2)Nokia N-Gage QD (WD2)Nokia Remote Camera
DCT-4+ (Plus)
Nokia 1200 Nokia 1208 Nokia 1208b Nokia 1209 Nokia 1650 Nokia 1650b Nokia 1680c-2b ClassicNokia 2310 Nokia 2600c Nokia 2610 Nokia 2610b Nokia 2626 Nokia 2630 AmericasNokia 2630 Europe/AsiaNokia 2670h FoldNokia 5000 Nokia 5000 Nokia 7070
BB5.0
Nokia 3109 ClassicNokia 3109 ClassicNokia 3110 ClassicNokia 3120 ClassicNokia 3250 Nokia 3500 ClassicNokia 3500 ClassicNokia 3600 SlideNokia 3610 Nokia 5200 Nokia 5200 Nokia 5220 XpressMusicNokia 5220 XpressMusicNokia 5300 XpressMusicNokia 5300 XpressMusicNokia 5310 XpressMusicNokia 5310 XpressMusicNokia 5320 XpressMusicNokia 5320 XpressMusicNokia 5320 XpressMusicNokia 5500 Nokia 5500 SportNokia 5610 XpressMusicNokia 5610 XpressMusicNokia 5700 XpressMusicNokia 5700 XpressMusicNokia 5710 XpressMusicNokia 5710 XpressMusicNokia 6085 Nokia 6085 Nokia 6086 Nokia 6110 NavigatorNokia 6110 NavigatorNokia 6120 ClassicNokia 6120 ClassicNokia 6121 ClassicNokia 6124 VodafoneNokia 6125 Nokia 6126 Nokia 6126 Nokia 6131 Nokia 6131 NFCNokia 6133 Nokia 6133 Nokia 6133 Nokia 6135 Nokia 6136 Nokia 6136 Nokia 6151 Nokia 6210 NavigatorNokia 6210 NavigatorNokia 6210 NavigatorNokia 6210 NavigatorNokia 6212 ClassicNokia 6220 ClassicNokia 6220 ClassicNokia 6233 Nokia 6233 Nokia 6234 Nokia 6267 Nokia 6270 Nokia 6280 Nokia 6282 Nokia 6288 Nokia 6290 Nokia 6300 Nokia 6300 Nokia 6300i Nokia 6301 Nokia 6301 Nokia 6500 ClassicNokia 6500 ClassicNokia 6500 SlideNokia 6500 SlideNokia 6555 Nokia 6555 ClassicNokia 6556 ClassicNokia 6600 FoldNokia 6600 SlideNokia 6630 Nokia 6631 (NM850iG)Nokia 6650 T-MobileNokia 6680 Nokia 6681 Nokia 6682 Nokia 7310 SupernovaNokia 7310 SupernovaNokia 7370 Nokia 7373 Nokia 7390 Nokia 7500 PrismNokia 7500 PrismNokia 7510 SupernovaNokia 7510 SupernovaNokia 7610 SupernovaNokia 7610 SupernovaNokia 7900 PrismNokia 8600 LunaNokia 8800 ArteNokia E50 Nokia E50 Nokia E51 Nokia E51 Nokia E60 Nokia E61 Nokia E61i Nokia E61i Nokia E62 Nokia E65 Nokia E66 Nokia E66 Nokia E66 Nokia E70 Nokia E70 Nokia E71 Nokia E71 Nokia E71 Nokia E90 CommunicatorNokia E90 CommunicatorNokia N70 Nokia N70 Nokia N71 Nokia N71 Nokia N72 Nokia N73 Nokia N73 Nokia N75 Nokia N76 Nokia N76 Nokia N77 Nokia N77 Nokia N77 Nokia N78 Nokia N78 Nokia N78 Nokia N79 Nokia N79 Nokia N79 Nokia N80 Nokia N80 Nokia N81 Nokia N81 Nokia N81 Nokia N81 Nokia N82 Nokia N82 Nokia N85 Nokia N85 Nokia N85 Nokia N90 Nokia N91 Nokia N91 Nokia N91 Nokia N91 Nokia N92 Nokia N92 Nokia N93 Nokia N93 Nokia N93i Nokia N93i Nokia N95 Nokia N95 8GBNokia N95 NAMNokia N95 8GB NAMNokia N95 Nokia N95 Nokia N96 Nokia N96 Nokia N96 Nokia NM705i
Saturday, March 12, 2011
All samsung unlock code
*2767*688** = Unlocking Code
***8999*8378** = All in one Code
***4777*8665** = GPSR Tool
***8999*523** = LCD Brightness
***8999*3825523** = External Display
***8999*377** = Errors
***5737425** = JAVA Something{I choose 2 and it chrashed}][/b]
***2255** = Call List
***536961** = Java Status Code
***536962** = Java Status Code
***536963** = Java Status Code
***53696** = Java Status Code
***1200** = AFC DAC Val
***1300** = IMEI
***1400** = IMSI
***2562** = ??? White for 15 secs than restarts.
***2565** = ChAeck Blocking
***3353** = Check Code
***3837** = ??? White for 15 secs than restarts.
***3849** = ??? White for 15 secs than restarts.
***3851** = ??? White for 15 secs than restarts.
***3876** = ??? White for 15 secs than restarts.
***7222** = Operation Typ (Class C GSM)
***7224** = I Got !! ERROR !!
***7252** = Oparation Typ (Class B GPRS)
***7271** = Multi Slot (Class 1 GPRS)
***7274** = Multi Slot (Class 4 GPRS)
***7276** = Dunno
***7337** = EEPROM Reset (Unlock and Resets Wap Settings)
***2787** = CRTP ON/OFF
***3737** = L1 Dbg data
***5133** = L1 Dbg data
***7288** = GPRS Attached
***7287** = GPRS Detached
***7666** = SrCell Data
***7693** = Sleep Act/DeAct (Enable or Disable the Black screen after doing nothing for a while)
***7284** = Class : B,C or GPRS
***2256** = Calibration Info
***2286** = Battery Data
***2527** = GPRS Switching (set to: class 4, class 8, class 9 or class 10)
***2679** = Copycat feature (Activate or Deactivate)
***3940** = External loop test 9600 bps
***4263** = Handsfree mode (Activate or Deactivate)
***4700** = Half Rate (Activate or Deactivate)
***7352** = BVMC Reg value
***8462** = Sleeptime
***2558** = Time ON
***3370** = EFR (Activate or Deactivate)
***3941** = External looptest 115200 bps
***5176** = L1 Sleep
***7462** = SIM phase
***7983** = Voltage/Frequenci (Activate or Deactivate)
***7986** = Voltage (Activate or Deactivate)
***8466** = Old time
***2255** = Call ???
***5187** = L1C2G trace (Activate or Deactivate)
***5376** = ??? White for 15 secs than restarts.
***6837** = Official Software Version
***7524** = KCGPRS
***7562** = LOCI GPRS
***7638** = RLC allways open ended TBF (Activate or Deactivate)
***7632** = Sleep mode Debug
***7673** = Sleep mode RESET
***2337** = Permanent Registration Beep
***2474** = ???
***2834** = Audio Path
***3270** = DCS support (Activate or Deactivate)
***3282** = Data (Activate or Deactivate)
***3476** = EGSM (Activate or Deactivate)
***3676** = Flash volume formated
***4760** = GSM (Activate or Deactivate)
***4864** = Dunno doesn't work on newer versions
***5171** = L1P1
***5172** = L1P2
***5173** = L1P3
***7326** = Accessory (I got Vibrator)
***7683** = Sleep variable (8)
***7762** = SMS Brearer CS (Activate or Deactivate)
***8465** = Time in L1
***9795** = wtls key
***2252** = Current CAL
***2836** = AVDDSS Management (Activate or Deactivate)
***3877** = Dump of SPY trace
***7728** = RSAV done** (Everything went to standart but nothing was deleted)
***2677** = ARM State (None or Full Rate)
***8999*636** = Have no clue what it is, i see 20 lines
***9999** = Software version
***8999*8376263** = HW ver, SW ver and Build Date
***8888** = HW version
***8377466** = Same HW/SW version thing
***7465625** = Check the locks
*7465625*638*Code** = Enables Network lock
**7465625*638*Code** = Disables Network lock
*7465625*782*Code** = Enables Subset lock
**7465625*782*Code** = Disables Subset lock
*7465625*77*Code** = Enables SP lock
**7465625*77*Code** = Disables SP lock
*7465625*27*Code** = Enables CP lock
**7465625*27*Code** = Disables CP lock
*7465625*746*Code** = Enables SIM lock
**7465625*746*Code** = Disables SIM lock
*7465625*228** = Activa lock ON
**7465625*228** = Activa lock OFF
*7465625*28638** = Auto Network lock ON
**7465625*28638** = Auto Network lock OFF
*7465625*28782** = Auto subset lock ON
**7465625*28782** = Auto subset lock OFF
*7465625*2877** = Auto SP lock ON
**7465625*2877** = Auto SP lock OFF
*7465625*2827** = Auto CP lock ON
**7465625*2827** = Auto CP lock OFF
*7465625*28746** = Auto SIM lock ON
**7465625*28746** = Auto SIM lock OFF
*2767*3855** = E2P Full Reset
*2767*2878** = E2P Custom Reset
*2767*927** = E2P Wap Reset
*2767*226372** = E2P Camera Reset
***6420** = MIC Off
***6421** = MIC On
***6422** = MIC Data
***6428** = MIC Measurement
***3230** = Trace enable and DCD disable
***3231** = Trace disable and DCD enable
***3232** = Current Mode
**7263867** = RAM Dump (On or Off)
*2767*49927** = Germany WAP Settings
*2767*44927** = UK WAP Settings
*2767*31927** = Netherlands WAP Settings
*2767*420927** = Czech WAP Settings
*2767*43927** = Austria WAP Settings
*2767*39927** = Italy WAP Settings
*2767*33927** = France WAP Settings
*2767*351927** = Portugal WAP Settings
*2767*34927** = Spain WAP Settings
*2767*46927** = Sweden WAP Settings
*2767*380927** = Ukraine WAP Settings
*2767*7927** = Russia WAP Settings
*2767*30927** = GREECE WAP Settings
*2767*73738927** = WAP Settings Reset
*2767*49667** = Germany MMS Settings
*2767*44667** = UK MMS Settings
*2767*31667** = Netherlands MMS Settings
*2767*420667** = Czech MMS Settings
*2767*43667** = Austria MMS Settings
*2767*39667** = Italy MMS Settings
*2767*33667** = France MMS Settings
*2767*351667** = Portugal MMS Settings
*2767*34667** = Spain MMS Settings
*2767*46667** = Sweden MMS Settings
*2767*380667** = Ukraine MMS Settings
*2767*7667**. = Russia MMS Settings
*2767*30667** = GREECE MMS Settings
*335** = Delete all MMS Messages
*663867** = Dump Mm file
***536961** = WAPSAR enable / HTTP disable
***536962** = WAPSAR disable / HTTP enable
***536963** = Serial eable / Others disable
***53696** = Java Download Mode
***5663351** = Wap Model ID [Your Model]
***5663352** = Wap Model ID [SEC-SGHXXXX/1.0]
***566335** = Wap Model ID [SEC-SGHXXXX/1.0]
*2767*66335** = Check on which model it is
*2767*7100** = SEC-SGHS100/1.0
*2767*8200** = SEC-SGHV200/1.0
*2767*7300** = SEC-SGHS300/1.0
*2767*7650** = Nokia7650/1.0
*2767*2877368** = Reset WAP Model ID to standa
***8999*8378** = All in one Code
***4777*8665** = GPSR Tool
***8999*523** = LCD Brightness
***8999*3825523** = External Display
***8999*377** = Errors
***5737425** = JAVA Something{I choose 2 and it chrashed}][/b]
***2255** = Call List
***536961** = Java Status Code
***536962** = Java Status Code
***536963** = Java Status Code
***53696** = Java Status Code
***1200** = AFC DAC Val
***1300** = IMEI
***1400** = IMSI
***2562** = ??? White for 15 secs than restarts.
***2565** = ChAeck Blocking
***3353** = Check Code
***3837** = ??? White for 15 secs than restarts.
***3849** = ??? White for 15 secs than restarts.
***3851** = ??? White for 15 secs than restarts.
***3876** = ??? White for 15 secs than restarts.
***7222** = Operation Typ (Class C GSM)
***7224** = I Got !! ERROR !!
***7252** = Oparation Typ (Class B GPRS)
***7271** = Multi Slot (Class 1 GPRS)
***7274** = Multi Slot (Class 4 GPRS)
***7276** = Dunno
***7337** = EEPROM Reset (Unlock and Resets Wap Settings)
***2787** = CRTP ON/OFF
***3737** = L1 Dbg data
***5133** = L1 Dbg data
***7288** = GPRS Attached
***7287** = GPRS Detached
***7666** = SrCell Data
***7693** = Sleep Act/DeAct (Enable or Disable the Black screen after doing nothing for a while)
***7284** = Class : B,C or GPRS
***2256** = Calibration Info
***2286** = Battery Data
***2527** = GPRS Switching (set to: class 4, class 8, class 9 or class 10)
***2679** = Copycat feature (Activate or Deactivate)
***3940** = External loop test 9600 bps
***4263** = Handsfree mode (Activate or Deactivate)
***4700** = Half Rate (Activate or Deactivate)
***7352** = BVMC Reg value
***8462** = Sleeptime
***2558** = Time ON
***3370** = EFR (Activate or Deactivate)
***3941** = External looptest 115200 bps
***5176** = L1 Sleep
***7462** = SIM phase
***7983** = Voltage/Frequenci (Activate or Deactivate)
***7986** = Voltage (Activate or Deactivate)
***8466** = Old time
***2255** = Call ???
***5187** = L1C2G trace (Activate or Deactivate)
***5376** = ??? White for 15 secs than restarts.
***6837** = Official Software Version
***7524** = KCGPRS
***7562** = LOCI GPRS
***7638** = RLC allways open ended TBF (Activate or Deactivate)
***7632** = Sleep mode Debug
***7673** = Sleep mode RESET
***2337** = Permanent Registration Beep
***2474** = ???
***2834** = Audio Path
***3270** = DCS support (Activate or Deactivate)
***3282** = Data (Activate or Deactivate)
***3476** = EGSM (Activate or Deactivate)
***3676** = Flash volume formated
***4760** = GSM (Activate or Deactivate)
***4864** = Dunno doesn't work on newer versions
***5171** = L1P1
***5172** = L1P2
***5173** = L1P3
***7326** = Accessory (I got Vibrator)
***7683** = Sleep variable (8)
***7762** = SMS Brearer CS (Activate or Deactivate)
***8465** = Time in L1
***9795** = wtls key
***2252** = Current CAL
***2836** = AVDDSS Management (Activate or Deactivate)
***3877** = Dump of SPY trace
***7728** = RSAV done** (Everything went to standart but nothing was deleted)
***2677** = ARM State (None or Full Rate)
***8999*636** = Have no clue what it is, i see 20 lines
***9999** = Software version
***8999*8376263** = HW ver, SW ver and Build Date
***8888** = HW version
***8377466** = Same HW/SW version thing
***7465625** = Check the locks
*7465625*638*Code** = Enables Network lock
**7465625*638*Code** = Disables Network lock
*7465625*782*Code** = Enables Subset lock
**7465625*782*Code** = Disables Subset lock
*7465625*77*Code** = Enables SP lock
**7465625*77*Code** = Disables SP lock
*7465625*27*Code** = Enables CP lock
**7465625*27*Code** = Disables CP lock
*7465625*746*Code** = Enables SIM lock
**7465625*746*Code** = Disables SIM lock
*7465625*228** = Activa lock ON
**7465625*228** = Activa lock OFF
*7465625*28638** = Auto Network lock ON
**7465625*28638** = Auto Network lock OFF
*7465625*28782** = Auto subset lock ON
**7465625*28782** = Auto subset lock OFF
*7465625*2877** = Auto SP lock ON
**7465625*2877** = Auto SP lock OFF
*7465625*2827** = Auto CP lock ON
**7465625*2827** = Auto CP lock OFF
*7465625*28746** = Auto SIM lock ON
**7465625*28746** = Auto SIM lock OFF
*2767*3855** = E2P Full Reset
*2767*2878** = E2P Custom Reset
*2767*927** = E2P Wap Reset
*2767*226372** = E2P Camera Reset
***6420** = MIC Off
***6421** = MIC On
***6422** = MIC Data
***6428** = MIC Measurement
***3230** = Trace enable and DCD disable
***3231** = Trace disable and DCD enable
***3232** = Current Mode
**7263867** = RAM Dump (On or Off)
*2767*49927** = Germany WAP Settings
*2767*44927** = UK WAP Settings
*2767*31927** = Netherlands WAP Settings
*2767*420927** = Czech WAP Settings
*2767*43927** = Austria WAP Settings
*2767*39927** = Italy WAP Settings
*2767*33927** = France WAP Settings
*2767*351927** = Portugal WAP Settings
*2767*34927** = Spain WAP Settings
*2767*46927** = Sweden WAP Settings
*2767*380927** = Ukraine WAP Settings
*2767*7927** = Russia WAP Settings
*2767*30927** = GREECE WAP Settings
*2767*73738927** = WAP Settings Reset
*2767*49667** = Germany MMS Settings
*2767*44667** = UK MMS Settings
*2767*31667** = Netherlands MMS Settings
*2767*420667** = Czech MMS Settings
*2767*43667** = Austria MMS Settings
*2767*39667** = Italy MMS Settings
*2767*33667** = France MMS Settings
*2767*351667** = Portugal MMS Settings
*2767*34667** = Spain MMS Settings
*2767*46667** = Sweden MMS Settings
*2767*380667** = Ukraine MMS Settings
*2767*7667**. = Russia MMS Settings
*2767*30667** = GREECE MMS Settings
*335** = Delete all MMS Messages
*663867** = Dump Mm file
***536961** = WAPSAR enable / HTTP disable
***536962** = WAPSAR disable / HTTP enable
***536963** = Serial eable / Others disable
***53696** = Java Download Mode
***5663351** = Wap Model ID [Your Model]
***5663352** = Wap Model ID [SEC-SGHXXXX/1.0]
***566335** = Wap Model ID [SEC-SGHXXXX/1.0]
*2767*66335** = Check on which model it is
*2767*7100** = SEC-SGHS100/1.0
*2767*8200** = SEC-SGHV200/1.0
*2767*7300** = SEC-SGHS300/1.0
*2767*7650** = Nokia7650/1.0
*2767*2877368** = Reset WAP Model ID to standa
Thursday, March 10, 2011
IMPORTANT INFORMATION SoftBank 705P/705Px Software Update
Thank you for using Softbank Mobile.
Faults (described below) have been found on some of SoftBank 705P/705Px handsets (manufactured by Panasonic Mobile Communications).
1. Identified Faults
When a sender's mail address contains a *quot;/*quot; (slash), characters after the *quot;/*quot; may not appear in Message List View or Message Window.
If battery is charged with handset power off, Retrieve Network Information window sometimes appears when handset is powered on again.
On occasion, parts of web links are not recognized as URLs (http://, https:// or rtsp://) in incoming messages.
Software to resolve the faults will be e available via Software Update. Software Update also includes other enhancements for 705P/705Px. We encourage all 705P/705Px users to download the new software. Please accept our apologies for any inconvenience. We appreciate your understanding.
2. Comprehensive SoftBank Mobile Response
Affected handsets:
Some products of SoftBank 705P (released on October 7, 2006)
Some products of SoftBank 705Px (released on June 21, 2007)
Software Update
Software Update will be available via the Network from November XX, 2007. Please follow steps below for Software Update.
*lt; Software Update Precautions *gt;
Before updating software, turn power off to end all active functions/applications, then restart handset.
Make sure battery is fully charged or charger is connected; a low battery may cause update failure.
Implement Software Update in a place where signal is strong and stable. Do not remove battery during Software Update.
Software Update may take up to approximately 15 minutes. More than one update may be required depending on handset. Follow onscreen instructions.
Do not remove battery during Software Update. If Update fails to complete after about 20 minutes, remove and reinstall battery before retrying. If Update still fails after retrying, bring the handset to the nearest
SoftBank shop.
Handset is disabled until update is complete. Other functions are disabled during Software Update.
Software Update should not affect Phone Book entries, images, sounds, etc. saved on 705P/705Px.
However, handset data may be lost due to hardware failure, damage, or water damage etc. Always back up important information before using Software Update.
Update automatically cancels Keypad Lock. Set Keypad Lock again after Software Update if necessary.
Packet transmission fees do not apply to updates (including checking,
downloading and rewriting).
Faults (described below) have been found on some of SoftBank 705P/705Px handsets (manufactured by Panasonic Mobile Communications).
1. Identified Faults
When a sender's mail address contains a *quot;/*quot; (slash), characters after the *quot;/*quot; may not appear in Message List View or Message Window.
If battery is charged with handset power off, Retrieve Network Information window sometimes appears when handset is powered on again.
On occasion, parts of web links are not recognized as URLs (http://, https:// or rtsp://) in incoming messages.
Software to resolve the faults will be e available via Software Update. Software Update also includes other enhancements for 705P/705Px. We encourage all 705P/705Px users to download the new software. Please accept our apologies for any inconvenience. We appreciate your understanding.
2. Comprehensive SoftBank Mobile Response
Affected handsets:
Some products of SoftBank 705P (released on October 7, 2006)
Some products of SoftBank 705Px (released on June 21, 2007)
Software Update
Software Update will be available via the Network from November XX, 2007. Please follow steps below for Software Update.
*lt; Software Update Precautions *gt;
Before updating software, turn power off to end all active functions/applications, then restart handset.
Make sure battery is fully charged or charger is connected; a low battery may cause update failure.
Implement Software Update in a place where signal is strong and stable. Do not remove battery during Software Update.
Software Update may take up to approximately 15 minutes. More than one update may be required depending on handset. Follow onscreen instructions.
Do not remove battery during Software Update. If Update fails to complete after about 20 minutes, remove and reinstall battery before retrying. If Update still fails after retrying, bring the handset to the nearest
SoftBank shop.
Handset is disabled until update is complete. Other functions are disabled during Software Update.
Software Update should not affect Phone Book entries, images, sounds, etc. saved on 705P/705Px.
However, handset data may be lost due to hardware failure, damage, or water damage etc. Always back up important information before using Software Update.
Update automatically cancels Keypad Lock. Set Keypad Lock again after Software Update if necessary.
Packet transmission fees do not apply to updates (including checking,
downloading and rewriting).
Saturday, March 5, 2011
redsn0w Crashing Issue FIX !!!
Hello,
Many Including me Encounter Problem that REDSn0w Crashes While JailBreaking 4.2.1 or Updating BaseBand Option ..
While the Uploading RAMDISK it says *quot; Redsnow Enoucounter an error and needs to be closed*quot;
FIX :
Is Simple Open Task Manager in your Windows computer , Right Click on RedSnow.exe process and select Set Affinity as shown in the image below . Set it to CPU 1 only . Now try to jailbreak or Update baseband of your phone .
This is for WinXP users
Win7 and Winvista users RUN Priority mode of Redsnow to WINXP SP2 and Run as Administrator
Br,
Many Including me Encounter Problem that REDSn0w Crashes While JailBreaking 4.2.1 or Updating BaseBand Option ..
While the Uploading RAMDISK it says *quot; Redsnow Enoucounter an error and needs to be closed*quot;
FIX :
Is Simple Open Task Manager in your Windows computer , Right Click on RedSnow.exe process and select Set Affinity as shown in the image below . Set it to CPU 1 only . Now try to jailbreak or Update baseband of your phone .
This is for WinXP users
Win7 and Winvista users RUN Priority mode of Redsnow to WINXP SP2 and Run as Administrator
Br,
Thursday, March 3, 2011
Trick to free up your N73's phone memory C: by 5MB...
Steps:
Hack your phone..Disable Plat security by CapsOff
Go to C:/private/102072c4 folder You will find a file named "reserved " of size 4.76MB
Delete it (Dont hesitate)
Congrats you've recovered ~5MB memory
CapsOn
why we Kicking this file out?
This reserved file is for FOTA (firmware over the air), and we wont need it as we never get any FOTA updates.It does eventually come back at times..most probably when you use the Device mgr. So at those times u can delete it again...Deleting this file will not affect your phone...I tested and using my N73 without any prob..
Warning: If you Wish, make a backup of the file in your Memory Card.
Hack your phone..Disable Plat security by CapsOff
Go to C:/private/102072c4 folder You will find a file named "reserved " of size 4.76MB
Delete it (Dont hesitate)
Congrats you've recovered ~5MB memory
CapsOn
why we Kicking this file out?
This reserved file is for FOTA (firmware over the air), and we wont need it as we never get any FOTA updates.It does eventually come back at times..most probably when you use the Device mgr. So at those times u can delete it again...Deleting this file will not affect your phone...I tested and using my N73 without any prob..
Warning: If you Wish, make a backup of the file in your Memory Card.
5 Tips to Make Your Cell Phone Battery Last Longer
Reducing power consumption helps fight global warming
Batteries can have a much longer life, if people follow just a few simple tips on how to save their power
Modern mobile phones have numerous applications installed, as well as a bunch of other features, including photo cameras, blitzes, Bluetooth devices and others. All these accessories take up large amounts of electricity from the battery, prompting users to recharge them more often. This consumes a lot of electric energy, placing unnecessary strain on power plants, to supply more juice.
Using energy-saving settings is a great way of reducing the overall electrical consumption of your phone, especially if you turn off the back light, which accounts for the depletion of the battery to a great extent. Screen-savers are also huge power drains, as they animate the screen even when the phone is still in the pocket.
New photo editing software, built into most mobile phones, are undoubtedly a great way of fine-tuning a photo on the spot, freshly after the moment it was taken. But using the blitz and the included pieces of software places great strain on the battery, which may need recharging after a couple of hours playing with these accessories. A good way to avoid this is by taking pictures in sunny spots, where additional lights are not required, and editing them at home.
Usually, if you stop an average guy on the street and take his phone, you will notice it has Bluetooth and WiFi turned on, as well as GPS, e-mail applications and several feeds, for the weather, sports results, news and whatnot. Turning all these applications off once you've finished working with them is a great way to save power. Also, when on the move, turn off the phone completely, as there's no signal anyway, and it takes a lot of power for the device to look for a connection.
Headsets are another one of life's little wonders, especially in a crowded place, where movements such as reaching inside your pocket are impossible. But you don't necessarily need a Bluetooth device for that; corded headphones work just as well. In fact, they might save you from curious glances, which are inevitably drawn to you when people think you're talking to yourself.
The next step is the easiest one – simply take care of the battery physically. Its contacts may become covered in dust or other such stuff, so cleaning them once in a while might prove to be an excellent idea. The link between the phone and the battery itself will be near perfect, and the amounts of electricity the battery will need to generate will be much smaller.
Batteries can have a much longer life, if people follow just a few simple tips on how to save their power
Using energy-saving settings is a great way of reducing the overall electrical consumption of your phone, especially if you turn off the back light, which accounts for the depletion of the battery to a great extent. Screen-savers are also huge power drains, as they animate the screen even when the phone is still in the pocket.
New photo editing software, built into most mobile phones, are undoubtedly a great way of fine-tuning a photo on the spot, freshly after the moment it was taken. But using the blitz and the included pieces of software places great strain on the battery, which may need recharging after a couple of hours playing with these accessories. A good way to avoid this is by taking pictures in sunny spots, where additional lights are not required, and editing them at home.
Usually, if you stop an average guy on the street and take his phone, you will notice it has Bluetooth and WiFi turned on, as well as GPS, e-mail applications and several feeds, for the weather, sports results, news and whatnot. Turning all these applications off once you've finished working with them is a great way to save power. Also, when on the move, turn off the phone completely, as there's no signal anyway, and it takes a lot of power for the device to look for a connection.
Headsets are another one of life's little wonders, especially in a crowded place, where movements such as reaching inside your pocket are impossible. But you don't necessarily need a Bluetooth device for that; corded headphones work just as well. In fact, they might save you from curious glances, which are inevitably drawn to you when people think you're talking to yourself.
The next step is the easiest one – simply take care of the battery physically. Its contacts may become covered in dust or other such stuff, so cleaning them once in a while might prove to be an excellent idea. The link between the phone and the battery itself will be near perfect, and the amounts of electricity the battery will need to generate will be much smaller.
Wednesday, March 2, 2011
How You Repair A Dead China Phone By Sam Rahman
First we need to know why a phone is dead-
1. For Software
2. For Hardware
1. For Software-
Flash is its final solution, but mtk cpu 90% phone done by format. if its MTK,SPD,AD, SI4904 cpu first try to format than try to full flash your phone with a good and perfect flash file. and other cpu haven't format option, so direct flash them. when you flash careful about original flash file version.
A. what you do before format or flash-
Always remember, before format or flash of your any china phone must first backup your current flash file if phone is dead, also do it. because it will help to find its original flash file version and many other.
B. What you need for flash or format a china phone-
(1) Connecting device (also your can do it with usb to serial cable but a device/box can give you full/final solution)
(2) Phone TX and RX.
(3) Need to know phone cpu type/model, flash chip type/model, Flash file version.
(4) For Flash need a good flash file which same to your phone original flash file version.
C. What problem you face for wrong flash file
(1) phone still dead
(2) white screen
(3) keypad not work
(4) phone hang after power on
(5) keep restarting
(6) no network
(7) etc.
Tool For MTK Flash info
2. For Hardware-
when a dead phone not possible to repair only with software you need to repair phone hardware.
Which hardware you need to check for dead phone-
(1) when you try to flash if phone not boot check power source/battery voltage/V+ pin in phone connector. just do confirm phone found enough voltage for software operation.
(2) if phone power source is ok but still not boot, do confirm your tx and rx is 100% working/tested.
(3) if tx rx is ok, than check your phone connector, its tx rx pin is confirm connect with cable and internal connector pin is joint on pcb perfectly.
(4) if pin is ok, maximum china phone tx rx going to cpu after crossing a resistor or capacitor so check them.
(5) if resistor is ok now you need to check boot diod, all phone have no boot diod so last try is check cpu tx rx pin.
(6) if boot is ok but phone not receive flash file, maximum time this problem coming from flash ic or ram (maximum china phone flash memory and ram have in one chip). so you need to try first re-hot it if still not solve change it.
but its true flash chip/ram always show error not only for them, sometimes cpu to flash chip/ram connection lost for bad cpu pin or bad cpu soldering on pcb. so check both of them.
(7) phone flash ok but not power on (although file is 100% correct) , for it you need to check
Flash chip/ram (95% include in 1 chip)
Clock crystal and battery
26mhz (near rf ic)
Rf ic,
Power ic and v+/b+ way
Bt ic
Last try is cpu.
i wish 2 do good for all
1. For Software
2. For Hardware
1. For Software-
Flash is its final solution, but mtk cpu 90% phone done by format. if its MTK,SPD,AD, SI4904 cpu first try to format than try to full flash your phone with a good and perfect flash file. and other cpu haven't format option, so direct flash them. when you flash careful about original flash file version.
A. what you do before format or flash-
Always remember, before format or flash of your any china phone must first backup your current flash file if phone is dead, also do it. because it will help to find its original flash file version and many other.
B. What you need for flash or format a china phone-
(1) Connecting device (also your can do it with usb to serial cable but a device/box can give you full/final solution)
(2) Phone TX and RX.
(3) Need to know phone cpu type/model, flash chip type/model, Flash file version.
(4) For Flash need a good flash file which same to your phone original flash file version.
C. What problem you face for wrong flash file
(1) phone still dead
(2) white screen
(3) keypad not work
(4) phone hang after power on
(5) keep restarting
(6) no network
(7) etc.
Tool For MTK Flash info
2. For Hardware-
when a dead phone not possible to repair only with software you need to repair phone hardware.
Which hardware you need to check for dead phone-
(1) when you try to flash if phone not boot check power source/battery voltage/V+ pin in phone connector. just do confirm phone found enough voltage for software operation.
(2) if phone power source is ok but still not boot, do confirm your tx and rx is 100% working/tested.
(3) if tx rx is ok, than check your phone connector, its tx rx pin is confirm connect with cable and internal connector pin is joint on pcb perfectly.
(4) if pin is ok, maximum china phone tx rx going to cpu after crossing a resistor or capacitor so check them.
(5) if resistor is ok now you need to check boot diod, all phone have no boot diod so last try is check cpu tx rx pin.
(6) if boot is ok but phone not receive flash file, maximum time this problem coming from flash ic or ram (maximum china phone flash memory and ram have in one chip). so you need to try first re-hot it if still not solve change it.
but its true flash chip/ram always show error not only for them, sometimes cpu to flash chip/ram connection lost for bad cpu pin or bad cpu soldering on pcb. so check both of them.
(7) phone flash ok but not power on (although file is 100% correct) , for it you need to check
Flash chip/ram (95% include in 1 chip)
Clock crystal and battery
26mhz (near rf ic)
Rf ic,
Power ic and v+/b+ way
Bt ic
Last try is cpu.
i wish 2 do good for all
Tuesday, February 22, 2011
MTK-chip mobile phone repair book series_Eng
We are currently in the maintenance of mobile phone chipset MTK accounted for more than 70%, MTK chipset cheaper mobile phones, multi-functional, non-technical conditions are ripe, and so on, so that the bad cell phone is easy to repair, we are bringing the vitality, MTK chipset in the mobile phone We have a lot of maintenance is characterized by, first, with a high degree of integration, and the other is a small external components such as the characteristics of the MTK chipset to understand the principles, so that rivals and emerge victorious in every battle, the failure to determine quickly and decisively to deal with failure, Our maintenance staff over the course, I introduced the following I MTK chipset in the maintenance of maintenance experience and common principles and to learn and exchange experiences.
First, power
At present, there are two power MTK chips, the two chip MT6305 is a MT6318 is a function of their more or less the same as in our regular maintenance to see.
Power pin map
Power boot process
Press the button when the boot after the diode turn-on, control the keyboard to detect low-level output signal, power supply and integrated circuit opened the output voltage, power supply start-up circuit is to maintain the reset signal, power supply reduction after the beginning of the normal output voltage separate ways, entering Start software, completion of the boot.
1, equipped with batteries, battery-powered start. Press the start button, so that the IC power (MTK6305) 32 feet (MTK6318) of the K7 feet high into low post, CPU to be reset after power supply, 32.768KHZ vibration from the system clock, CPU work, CPU power to the (MT6305) of 24 feet (MT6318) of the foot F9 reset signal, power supply is to maintain continuous work.
Second,
MTK chipset does not boot repair
Phone start working conditions, continued normal phone to boot, take the following four conditions: First, the work of the normal power supply IC; Second, the normal work of the clock, and the third is the normal logic circuits, software is the work of the normal four.
1, the work of the normal power supply IC
(1) MTK normal power supply IC is that there is a voltage, that is, the battery voltage or external power supply;
(2) start trigger signal, MTK boot trigger signal is low, the boot trigger signal is sent to the IC power, press the start button in, the boot will have a trigger signal changes in the level of (change from the high Low).
(3) power supply IC integrated within the general group of more controlled or controlled regulator circuit, when the boot trigger signal when the IC power regulators should have multiple output voltage output.
Power 18 # (VMEM) = 2.8V, for the character.
Power 20 # (VDD) = 2.8V, for logic.
Power 22 # (VRTC) = 1.5V, for real-time clock circuit.
Power 24 # (RESET) = 2.8V, voltage reset
Power 25 # (VTCXO) = 2.8V, for crystal 13M # 4.
Power 27 # (AVDD) = 2.8V, for logic.
Power 30 # (VREF) = 1.3V, voltage reference.
Power 33 # (PWRBB) = 1.5V voltage to maintain the boot, the CPU through the C1 feet.
Power 48 # (VCORE) = 1.8V, for the CPU.
(4) to maintain the start signal from the CPU, power supply IC has been only start after the signal to maintain in order to maintain output voltage, or cell phones will not be able to continue to boot.
2, clock circuit
There are the normal system clock. CPU clock signal by the beat is the basis of data processing, mobile phone in the clock circuit, there are two: One is the clock VCO modules, including the oscillation circuit components and crystal. When the normal power supply connection, the self-oscillation, the formation of the output signal 26MHZ; and the other is the crystal frequency integrated circuits and components, the frequency IC to be an internal power supply after the crystal oscillator circuit for start-from-IF amplification module output. 26MHZ clock after a general capacitor, resistor or amplifier supply CPU, also the supply of radio-frequency phase-locked loop circuit as a basic clock signal.
3, logic and normal work
(1) there is the normal work of the power supply. Press the start button, power supply IC output stable power supply voltage logic supply, including the CPU, FLASH and the clock circuit.
(2) there is a normal reset signal when the CPU just for the power, its internal register in the random, not the normal operation procedure, CPU reset signal must be reset. Cell phones in the reduction of the CPU are generally low-end reduction, that is, to a certain period after the clock so that a variety of internal CPU registers cleared, and then here was another high voltage, so that the CPU run the program from scratch.
(3) the main logic circuits, including CPU, FLASH, CSP. When the CPU power available, the clock and reset the three conditions, the adoption of election-chip FLASH contact with the signal through the data bus and address bus to transmit data with each other.
(4) is a software phone CPU control of the boot and features a variety of procedures, the boot process and stored in FLASH set up within, MTK's early 6205,6217,6218,6219 such as CPU, such as FLASH data encryption does not, in the late 6223's, such as CPU , 6225,6226 BA, 6228,6230, and so are the FLASH data encryption, data is encrypted with the mobile phone models are not compatible. Therefore, if the wrong software or software may not cause the phone not to boot. Of course, the software may also be caused by abnormal network does not, does not indicate that dysfunction, death, and so many of the resumption of the boot failure.
4, power is not caused by the boot
Kin start by measuring whether the power supply voltage is 3.6V, output voltage in the power measurement is normal, there is no test reset signal output voltage 2.8V, is the maintenance of high voltage signal 2.8V.
(1) failure to maintain signal
When the boot by phone keys, control the keyboard to detect low-level output signal, power supply and integrated circuit opened the output voltage, power supply start-up circuit is to maintain the reset signal, if the CPU does not maintain the output signal can cause boot release button fault shutdown , This proved not to maintain the CPU to send the signal to reach the power supply can lead to the maintenance of normal working condition.
Approach
1, MT6305 power to check the first 33 feet, MT6318 first leg A9 have to maintain voltage, if there is proof voltage CPU has to maintain the voltage sent from the generally bad power failures, power-for troubleshooting.
2, check power MT6305 first 33 feet, MT6318 first leg A9 has no voltage if there is no CPU or worse caused by Xu Han, the first Canadian solder to the CPU or CPU processing or replacement for, such as CPU.
(2) based on current key start small
When the boot by building ammeter that only reflects the current 10MA, the CPU is obviously not working, check to the CPU power supply voltage (MT6305 first 48 feet and 18 feet) (MT6318 No. J10 feet and legs G1) voltage of 1.8V, 2.8 V is normal.
Approach
Caused by the start button is mainly due to the current small-26M clock circuit caused by work.
1, MT6305 power of 25 feet if there are voltage
2, MT6305 power of 25 feet to the power supply line if-26M
3, 26M crystal clock is bad
4, whether or not the normal work of the frequency or frequency caused by the bad.
4, the normal voltage does not boot (3.6V)
Battery does not start with the work of power supply voltage of 3.7V not boot, when the voltage of 4.5V to start a mobile phone.
Approach
(1) Check power supply voltage VBAT first MT6305 # 7, # 19, # 26, # 47 voltage is low voltage of 3V or so, check the MT6305 voltage VBAT feet + B to have a load resistance is aging, corrosion, caused by bad The failure, shorted resistance to the battery installed after the normal boot.
(2) of the power failure caused by bad in itself, for a troubleshooting.
(3) Check whether the phone plug end the phenomenon of corrosion caused by short circuit
5, rise to power in a few minutes after the start of the crash, restart
When the normal start or restart a while on death, the phone does not work.
(1) to the failure of such phenomena in general we are dealing with software maintenance, software is treated the same fault, I suspect that is not bad software, written in the next after the failure is still the same, I suspect that is not the CPU Xu Han-induced, I CPU and add character to carry out welding, or failure still, I began measuring the output voltage power supply, I found that MT6305 power supply voltage of only 48 feet voltage 1V, the normal voltage is 1.8V, I take Power put on a try, the boot is not normal and the resumption of the death.
Note: The phone does not start when we should pay attention to the maintenance of the power supply output voltage, output voltage power supply to our maintenance staff is a very important figure to be the normal power supply voltage, sufficient to prove the power of good or bad, so we Inspection failure to speed up the pace, not a waste of time.
Third, the keyboard light control circuit and maintenance
Boot normal mobile phone keypad, and other non-liang, the detection of light-emitting diodes found negative for the control voltage 2.8V, cathode voltage of 3.7V, control and the negative Yong Niezi to short-liang, such as a keyboard, light-emitting diode that is normal, a fault in the negative Control side, check the power of the MT6305 of 41 feet, 41 feet and control of light-emitting diode negative side of the load resistance between short-term, double-check by the board found that there are traces of corrosion extract, and found clear after the power supply board consists of a corrosion hole lost, With a copper wire from the power of the light-emitting diodes to fly 41 feet of negative resistance load control on the troubleshooting.
Description: In the cell phone repair, is also very important details, grasp the principles and details in the maintenance of improved speed to improve their technology.
Fourth, the background screen lights control circuit and maintenance
MT6318 background signal-controlled road map
Lights in the context of cell phone applications are two basic
(1) is a step-up control circuit is a series of light-emitting diodes
(2) Multi-level control is a control IC to complete the control IC can control the 4-way voltage 4 so that the light-emitting diode light at the same time can also control the two light emitting diodes, or 4-way control of voltage to make changes in the brightness light-emitting diodes Variable low.
(3) in the regular maintenance we met the background screen is not bright lights failure, the first point of failure detection, measurement screen whether there is a voltage lights, a lot of multi-class background of the screen to control the lights, multi-level control panel lights for the line with 3-5, or Pressure is controlled by two light-ray background of the screen, so that we can determine or control is a multi-stage step-up control of the background light of the screen.
(4) screen background light is not bright lights
1) the background screen measuring voltage lights are in working order, if we are in the normal general maintenance, ordinary reactionary screen background of the screen so that the lights off caused a lot of lines.
2) the background screen control IC bad light, can not find in the accessories, we can change the way to deal with the multi-level control of the K1, K2, K3, K4, such as linking to connect to VBAT (3.7V) voltage Side, A1 is a negative side control, separate from the keyboard light control negative side, the keyboard lights in general has a negative side to control the load resistance, from one foot to power it, this does not pass the background screens load resistance of the lights is the perfect .
3) step-up screen background light control, boost control circuit or a bad driver IC or step-up coil, such as bad, if not find a corresponding accessories, we can do the change of the solution to the background screen is not bright lights, we all know Screen background signal-controlled step-up circuit of the screen is a series of background light, he can be more than 12V voltage required to light up the 4 light-emitting diodes, we screen the background of the LED lights off, into a parallel, so that you can point voltage 3V It Liang, a positive VBAT (3.7V) voltage end of the cathode separate from the keyboard light control negative side, the keyboard lights in general has a negative side to control the load resistance, from one foot to power it, this does not load Resistance screen background lights of the perfect.
Fifth, the circuit card fault detection and repair
The basic principles of work
MTK chipset, CPU has to provide circuit card SIM card data and the start signal voltage, SINDATA data signals, SIMRST reset signal, SIMCLK clock signal, SIMVCC voltage control, respectively, to the power of (MT6305) 9 feet, 10 feet, 11 feet, 12 Feet, and so on, an integrated power conversion module SIM card switch, the CPU to control SIMVCC, when the 12-foot power supply voltage 2.8V, SIN card to open the power switch conversion module is (MT6305) Power of 8 feet to the beginning of SIM cards Power, 14 feet, 15 feet, 16 feet to start output signal SIM card, SIM card is working.
Repair process
First of all, check card connector, measuring card data sitting on the line to resistance, the resistance did not prove card connector and power connector or not caused by short-term, oscilloscope measurements in the boot of 2-3 seconds can be measured card signal waveform, If there is no proof of wave power is no signal output card, check the power supply, power measuring 12 feet to see whether provided by the CPU voltage waveform, a waveform prove bad for power supply, no waves caused by Xu Han check whether the CPU or the CPU and the power of Interruption caused by the line, if the disconnect between the CPU and power supply you can find on a 2.8V power supply voltage from 12 feet, the second 2-3 start in measuring the power of 8 feet, 14 feet, 15 feet, 16 feet Card connector or a normal wave.
1, does not recognize card
Immersion is a mobile phone, customer identification card used to say, I open the phone to see the Main Board, was found next to the card connector corrosion, with oscilloscope waveform measurement card connector, three signal lines are low voltage waveform of the leakage, Multimeter used to detect signals in the card-to-ground capacitance, capacitance-to-earth removed troubleshooting.
2, arising from the non-recognition software card
Boot normal phone also did not find any other anomalies that do not identify card, open the phone card connector on the measurement of resistance to normal, oscilloscope waveform measurements found no wave, was also considered to be caused by a bad power supply in the boot 2 -- 3 seconds measured 12 feet of power has not found 2.8V voltage power source in the 9 feet, 10 feet, 11 feet and no wave is not a bad CPU, CPU to try to add the following welding how to test failure Or do not recognize the same card, it is the CPU it does not work in our industry has a habit of maintenance, as appears to be a hardware failure to deal with the software that I was an on-line information was loaded into power after the card identification card boot A.
3, Power caused by the non-recognition card
Bad power supply caused by the non-recognition cards, not-for-power deal can not fault identification card, the principle is power, there are circuit switched data card, the card and control signals from the CPU, by the CPU to power the output power out there.
The following graphic
Power in the identification card is not bad, not-for-power can also get it in the power of 9 feet, 10 feet, 11 feet, and so on from the CPU card from the three signals were received on card connector, in taking on a 2.8V power supply Voltage in the power of 14 feet, 15 feet, 16 feet card output broken foot, boot test drive all the normal identification card, in the maintenance of two-phone card to be alone when they found the problem, not through the power card signal from the CPU card directly to the conversion on the circuit.
4, two-maintenance card non-circuit detection and identification card maintenance
Two-card to be double-or dual-card single question, and so on, in the maintenance and repair single-card mode, dual-CPU are two CPU at the same time, start-up in the main CPU when the first post-paid start in the CPU, through the power circuit card The output, dual-card to be double-or single-output power when there is a signal to the dual-card circuit card in the card connector from the CPU control, dual-CPU single-CPU and the difference is that the CPU's have a single card conversion circuit, so that Phone cards to achieve double-double to be double or single card to be a switch card or 2 cards work in our maintenance, especially in dual-CPU single card to be double-or single-card circuit to be the conversion module (MT6302) a lot of problems because he VBAT directly to a battery power supply is likely to result in high current, leakage, short circuit, and other damage.
5, double, single card is not to be identified cards 2
Customers use mobile phone customers by phone, said a fall below 2 does not recognize the card, check card to open the phone's 2-to-ground resistance is normal, with 2 card oscilloscope measurements found no power supply voltage waveform, a card in the power supply Card 2 feet from the boot test, 2 cards can work, as mobile phone system switch card and a card 2 also normal.
Sixth, testing and maintenance of radio frequency circuit
The straight drive often to see the built-in antenna, there are basically two kinds of built-in antenna.
Preface: mobile phone antenna must be selected frequency circuit board and the resistance, if not in strong signal when the normal communication in weak signal when the signal-to-call diving, no service call, such as intermittent failure in our maintenance in a lot of people do not Take note of this fact, often higher rates of mobile phone renovation.
1, the election-frequency antenna circuit
As we often say that maintenance is frequently the election circuit, according to the theory is that the antenna matching circuit, generally 75 or so in Europe, we have two common.
2, in order to better send and receive electromagnetic waves, the parallel resonant capacitor in the circuit boards of the two very open to inductance for the oscillator. Capacitive distribution to achieve compatibility, - the GSM-band EGSM (low-fat, higher 880 ~ 915 MHz and 925 ~ 960 MHz) plus DCS (issued 1 710 ~ 1 785 MHz, received 1805 ~ 1 885 MHz), total Antenna on the request for DualBand (880 ~ 960 MHz, 1 710 ~ 1 880 MHz). Therefore, there are two inductors for a sparse density of the coil to meet the two-frequency band to send to receive.
3, cell phone antenna matching, the radio frequency band signal circuits, as well as the band device duplex to the phone in a different band of radio frequency signals connected to the antenna. One of the radio frequency signal circuits, respectively, with corresponding matching circuit, making the radio-frequency signal circuit by the launch of the antenna, the antenna receiving the signal characteristics will not affect each other. See here, everyone should know that the antenna and antenna matching circuit principle, we often met in the maintenance of such a situation, MTK chipsets.
3, antenna switch to switch the role of the band, the separation of receiving, signals the launch, in many cases because we do not have time for the antenna switch will direct the short, but some models because the receiver, launching another signal interference can cause signal weak , When the signal-to-call diving in weak signal areas such as mobile phone service without fault.
4, note: R1 for the 100-200? resistor, Q1.Q2 the old antenna switch, is looking for two (fast diodes) can, working principle is the fast diode switches from the role, in order to receive control for low-end power Ping, the switch does not work, to receive signals transmitted directly to receive a filter, when fired high for the fast turn-on diodes, power amplifier output directly from the antenna to launch out to receive such a launch could signal an independent, non - Interference. Fast diode work with the general principle is the same as diodes, but ordinary diode switches in a state of the reverse recovery time is longer, about 4 ~ 5ms, can not meet the high-frequency switching circuits. Fast diode rectifier mainly used in high-frequency, high-frequency switching power supply, high-frequency RC snubber circuit, inverter circuits, and so on, the reverse recovery time of up to 10ns. Fast diode include fast recovery diode and Schottky diodes.
5, antenna and antenna switch, filters, and other common cause of failure
1, signals diving
2, weak signal
3, firing difficult
4, intermittent firing
5, no signal
6, firing off
7, found gateway machine
Trouble is, and so on and the antenna matching circuit caused about.
Seven, IF principle of supply and maintenance
1, MT6129 four-band transceiver channels, mainly in GSM850, E-GSM-900, DCS1800-PCS1900MHz its receiving circuit, including selective circuit, the circuit switch (antenna switching) filter circuits such as filtering, MT6129 chip integrated with the launch of the reception circuit And the frequency synthesizer circuit, to enlarge Clock circuit and so on, and there are MT6129 regulator modules radiofrequency, VBAT from 6129 to 3 feet and 15 feet to provide 3.8V voltage, CPU T1 by the output VCXOEN foot control signal to the 6129 14-foot control 6129 RF internal voltage regulator power supply circuit work, 4 feet by the output VCC-RF2.8V, 16-pin output VCC-SYN2.8V, power supply from 27 feet ADD2.8V power output of 6129 to 37 feet for the 6129 IQ module to provide power supply circuits.
2, MT6139 in the MT6129, based on the four-band transceiver channels, mainly in GSM850, E-GSM-900, DCS1800-PCS1900MHz its receiving circuit, including selective circuit, the circuit switch (antenna switching) filter circuits such as filtering, MT6139 chip With the launch of the reception circuit and frequency synthesizer circuit, AFC and the clock amplifier and so on, 26M crystal clock and the General MT6129, a different shock is not the same way, MT6129 is the power supply shocks after the production of 26M into the IF frequency, MT6139's 26M is a crystal clock circuit 26M have access to the frequency of the frequency, 26M crystal clock has no direct power supply to three feet of a grounding pin output, MT6139 RF power supply is a regulator and a separate module.
3, the experience of maintenance: no maintenance of the mobile phone signal, must be selective circuit, receiving circuit, firing circuit to keep clean, there is no other flux, as are the use of high-frequency radio frequency circuit original, this will result in no signal, weak signals, Signal diving, firing difficulties, such as network failure, mainly due to failures caused by the election of the inductor circuit frequency, high-frequency capacitance, and so on, or removed for cause and does not match the impedance of the antenna, then hit the difficulties caused by the main reason.
4, quickly determine fault, IF we receive a foot of a leave Inductor take on the antenna, IF output will then launch a false antenna and boot test machine to see whether there is a cell phone signal and launch, and so on, if there is evidence has-IF front-end Issues such as antenna switching, filter receiver, to receive high-frequency capacitance, power amplifier and so on. If there is no signal, we suspected IF, 26M, CPU, software, which is divided into two major pieces of failure to narrow the scope of the failures in maintenance-free radio frequency signals, such as failure to quickly determine the point of failure.
5, MT chipset RF circuit repair my own experience
MTK chipset, the RF part of the circuit's IC mainly IF two chips: MT6129; Second, the MT6139.
No quick to judge the signal, without firing, weak signals, such as failure to fight the emergency phone
First of all, we open the phone first look below to see some of the radio frequency.
1) to see whether the radio frequency part of the clean
2) to see there is no other maintenance personnel have been revised
3) to see there are no places Corrosion extract
4) view the mobile phone is not original or Shuaiguo out of a catch or not
5) Check more attention to further understand the scope of failure
6, Jin-free 288 phone signal
Reflected by the customer before January extract, is looking to open a mobile phone chipset MTK, the main version has traces of corrosion, oxidation spot some of the components or circuits, such as broken, first of all, after the board clean boot, the boot through the current reaction and There is no signal screen, we know that MTK is not installed in the phone cards as long as there is time to start signal will be displayed, by detecting frequency signal oscilloscope input waveform has received hopping signals that the fundamental frequency of normal, careful testing found that the filter And inductors are traces of corrosion, the filter inductance and scored from the boot after the welding display the signal to put on a network card can be called normal.
Experience: Immersion corrosion in the maintenance of the radio frequency circuit, in the absence of failure should not be found on the frequency, antenna switch, power amplifier to carry out additional raids like welding, which will lead to corrosion of the original off, disconnected lines, such as corrosion, Some components or a bad motherboard, you have to bring a long slow process of repair.
7, transit ZT886 dual-card-free cell phone signal
Customers are used to crash, the screen has been bad for the screen, the screen for no signal, no current search network, the radio frequency part of the inspection did not find any abnormality, by their own experience, the general crash is the big thing is that Easily broken or delayed, such as welding, I would let CPU plus welding, machine failure test remains the same, said customers in the absence of prior to the fall also can be used to fight a good answer the phone, I would like CPU is not a welding trailer to a CPU Cong Zhi-tin solder in the back after the test machine is not the same signal, this time I used the oscilloscope measurements to receive the signal frequency, intermediate frequency receiver in the foot after another antenna or no false signals in the frequency feet will then launch a false signal to the antenna or not, the blame It is not a bad frequency, for a first look, or the same frequency and the CPU is not a short-circuit or clock problem, 26M measuring voltage 2.8V, measured in the frequency 26M is also normal, think of all of a sudden on-line measurement never 26M This is not quasi-26.00000000M, previous online surveys are 25.900000000M-25.9999999999 about 26M to the frequency of such quasi-line test is not, except in the AFC can find out when disconnected, and then think of the AFC signal, 26M measurement 26M won the AFC on foot to prevent the infinite is that the CPU is no signal to the AFC on 26M, 26M fly CPU won control of the AFC feet, boot test machine had received a phone call signal normalized.
Experience
CPU output from the AFC automatic frequency control signals, to adjust the frequency of 26M to reach the intermediate frequency mixer circuit work needs to receive the signal frequency tracking and locking, follow-up phase with the lock, and so on, the frequency is in a stable, we 26M measurement when the AFC after the foot off the Quasi is a measurement.
8, there is no signal the launch
CECT-368 double-double to be mobile, use a folding machine to see the new machine Moyoudongguo, the cards are installed on two-out do not call the failure of the launch, both cards can access, CPU is the 6225A, is the frequency MT6139, is the power amplifier PF08155B, suspected amplifier is not broken or industrial problems in the first intermediate frequency on leave after another antenna, then try to call a normal machine, which has proved to be amplifier, first in the oscilloscope measurements found the net in the amplifier Industrial foot found weak voltage waveform is not caused by the CPU, find the cause of the problem is the industrial control signals are provided by the CPU, the CPU plus the following welding failure is still the same, it is a software problem, not many would like to format the following In that format after the failure is still the same, then the next in line to write data into a boot dual boot machine test cards can be a normal calls.
Experience: We have not launched to deal with the problem, first of all to watch whether the radio frequency part of the unusual circumstances, (refers to the abnormal situation, extract, corrosion, there are obvious components of the damage, etc.) If not, the following measuring frequency of firing pin and output Amplification of the Industrial feet to determine the scope of failure to gain a better understanding after the start in the repair, do not add to large areas of welding, which can cause unnecessary losses, a waste of time.
9, no signal
One customer used the T168 mobile phone, CPU is 6226BA, IF is MT6129C, power amplifier is the RF3146, to open a cell phone to see very much of the repair, said customers in the repair before the signal is also from time to time so that they do not repair the signal of At this time I board the radio frequency part of the cleansing of all the following, do not look at the filter is used to connect the line, when I boot test drive found the signal, the signal is the weakness of the test call was also normal, weak signal That is the filter problem, in other motherboard down on a filter 900M, welding machine on the test signal over the normal cells also fired, a happy heart, the capacity to pay the next day, said a customer came in the home did not signal a The signal to go out there, the antenna is not a good catch, open the phone antenna is detected, the antenna to receive a number of election-frequency circuit capacitors and inductors of the two did not, the problem is not caused by, so to get a large capacitors and inductors Welding up after the normal test drive, type the following for customers to go back, go back to the customer does not come, proved to be selected frequency antenna circuit does not match the rise in weak signal of the signal he did not, in strong signal when the signal is over The grid.
Experience: We repair to the attention of radio frequency part of some of the details, one antenna, the antenna is a selective circuit, is a three-antenna switch, is a four-filter attaches great importance to this, five radio frequency circuit to be clean.
Eight, MTK low power shutdown
1, low-voltage mobile phones will soon prompt start off, this time on his cell phone turned off, the phone is not turned on.
MTK in the cause of the CPU has two voltage detection pin is a high detection, is a low-level detection, when the CPU-D6 not detected when high, CPU as the initiative on low-voltage shutdown, MTK-CPU There MT6205, MT6217, MT6218 are generally 104 resistance, MT6219, the general CPU in the next two to do resistance testing voltage, MT6226, MT6225, MT6228-CPU power MT6305 in the use of the general resistance of the two has to do voltage detection, MT6226, MT6225, MT6228-CPU in 6318 the use of power, there is a direct power supply to provide the high voltage.
2, MTK low maintenance shutdown is about to experience:
1) General is about to shut down a lot of low-power CPU is caused by Xu Han. Canadian approach to welding Zhi Cong CPU or CPU.
2) The software also can cause bad low-power shutdown failure to deal with the following format or software, written from the heart, and other information.
3) Detection of exclusion (exclusion 104) caused by the bad low-power shutdown, for exclusion (General MT6205, MT6217, MT6218) with the more exclusive group.
4) MT6219, MT6225A, MT6226, MT6228, and other low-power shutdown is usually caused by bad testing resistance, resistance to replace.
5) MT6219, MT6225A, MT6226, MT6228, and other low-power shutdown resistance testing has not caused a lot of voltage, resistance is not bad, we can take on a 2.8V power supply voltage to give him the OK.
6) MT6219, MT6225A, MT6226, MT6228 use the power MTK6318 usually caused by a bad power supply, and some not-for-power can deal with failures, first of all, when we start to measure the power around and see that no large capacitor voltage, that is, MT6139 L4 the foot if they did not have a voltage when you are next to the measurement of capacitance voltage 2.8V if you can draw on his try-voltage, if we can rule out the possibility that failure to prove the feet, MTK6139 power output of a battery voltage detection In the next to the power supply filter capacitor, as long as it is to find the capacitor to a voltage of 2.8V can be resolved by a low-power shutdown fault.
Nine, microphone and earpiece circuit repair
1, the first measurement of whether the damage to the microphone, you can use digital multimeter 2K files, then transfer Hong Bi-positive, negative and total access, digital multimeter numerical display, and then his mouth, then Blow Digital Multimeter changes in the value of the show. Shows that normal microphone.
2, a lot of bad cell phone microphone main reason is that the extract caused by corrosion or broken.
3, microphone in the stand-by phone when there is no voltage, in a phone call can be measured when the microphone out of the cathode voltage of about 1.8V-2.8V voltage, if there is no measuring voltage or power supply may be disconnected resistance Caused by the bad.
4, in the phone call, the microphone cathode voltage is normal, then send or sent to the voice of small words such as failure, usually have a microphone circuit caused by the leakage, paying particular attention to the microphone circuit-to-ground capacitance, Capacitance-to-ground fault caused a lot of leakage.
5, send microphone, the normal voltage, through telephone touch method used to find the reasons for failure, in the open when the phone Yong Niezi iron or touch the original microphone circuit in the phone to hear whether or not you have a touch with the original voices reflect If there proved to be a transmitter circuit problem is the absence of audio processing system, MTK chipset is the integrated audio processor in the CPU in, CPU or bad, Xu Han, then send the rise.
6, then send the MTK chipset, is the largest number of failures, caused by the software, then send or send voice so small and so are a lot of failures, so we sent in maintenance, then failure to pay attention to a few points above it.
10, MTK receiver circuit
MTK receiver circuit is very simple, CPU integrates audio processing module, the handset has audio signal directly from the CPU out, we did not repair the handset in the voice of the first to use handset multimeter resistance measurement to determine whether good or bad handset, measuring in the main board of the handset A \ B resistance point to determine whether the motherboard caused by short-term, with 10,086 dial desk in the oscilloscope to measure when the handset on the motherboard A \ B point there is no sound waves to determine whether the CPU is the problem, CPU Zhi Cong and so on, or for Approach.
11, MTK chipset music IC enlarge
1, MTK chipset to enlarge the music has more than 10 kinds of IC, I, for example on a common double, a single-or two-channel music to enlarge IC maintenance mode, the amplification of music IC 8 feet to 9 feet, 9 feet of two hours is a central point is grounded, is a central point of access VBAT voltage, we often encounter problems in maintenance.
2, MTK chipset with integrated MP3 music processing module, CPU's T3 terminal control and A15, B15 two-channel output, output music to zoom zoom IC output out to see if it is simple to do with the very complex, the first music IC amplification is very small, pin-not grasp the direction, once the foot-fault caused by welding current, welding technology can not result in the following short-circuit, 9, called the amplification of music, there are two IC, you can board the IC measurement center Then the ground is still the power to determine what music you use the zoom IC, 9 feet of the center of IC and two feet or take over the earth, and other such power to tell a good direction. So if there is no music, first detected the following input in the amplification of music around the IC has resistors or capacitors in general is input, oscilloscope measurements there is no sound wave, there is evidence to enlarge IC bad music, such as the CPU has not requested additional welding and so on.
3, MTK chipset with integrated MP3 music processing module music noise distortion great failure to understand the principle point of amplifier, we know that in the amplifier input enter a weak signal, amplified by the amplifier output to the speakers that we can hear the Zhener Sound, if brought out the amplifier input, such as failure or leakage, there is the voice of the amplifier output or the exchange of voice, and so much noise, noise in general is not a big music amplification IC caused by the bad is to enlarge the input signal IC caused by the inspection found that music There are black corrosion input capacitance, capacitance to be replaced after the normal music.
4, musical sound glitch
Customers by phone before the show music sounds great, the next day when all of a sudden the voice of a small, as long as we maintain in the cloud is on the small voices, there is no music in general is a direct amplification of music-for-IC, I changed the music is still very small, is Music is not the IC input in question, I major in computer audio input line used to receive mobile phone music IC input, so that the mobile phone play music, but still small voice, touch Yong Niezi music of the IC input found Great voice, this proved not bad music IC, the fault lies with the input, MTK have a CPU chip output signal of the music is not a bad CPU, the first increase in the following welding that the increase after the welding boot normally play music music A.
Fault: small voices in music, music without fault in the first music of the IC input signal into a look at music is not-for-IC, if that is normal CPU failures.
5, software failures are not ringing music
The fault is obvious software fault, because there is ringing voice, play music is sound, first of all to deal with the following software format, or as the failure to find a later written into the information the OK.
Little experience maintain
Maintenance of our music to enlarge the IC, I used my side of the tool is a computer sound, the computer's audio input received phone music of the IC input Do not forget ground, so your mobile phone, play music, you have a computer Stereo sound on the come, so you can more easily determine the CPU is the music or the issue of the IC.
12, the keyboard circuit testing and maintenance experience
MTK chipset, the following points about the keyboard
1, main board-style keyboard
Main Board-keyboard, and is one of the main board, MTK chipsets used in cell phones, many are also many failures, the board-type keyboard, many shortcomings, we often use the keyboard, especially good people who send text messages, according to the hand in the keys Pressure on the board so that the deformation caused by malfunctioning keys, Xu Han components, do not start to operate when the lock button, and other failures, said the key MTK chipset is almost no protection circuit, there are only a few places on the capacitor, the button directly to the CPU-side control .
2, single-socket keyboard
Keyboard-Sockets alone, the fault often lies with the seat up and down, frequently used keys is likely to result in a failure of one or more key group of key failure of failure, the reasons for the frequent use of the keyboard so that the keyboard loose Block up and down link will appear after one or a combination of Failure of key failures.
3, single-cable connection
Single-cable connection of the few bad, that is caused, such as broken, extract, in the maintenance of regular activities, causing damage to the keyboard cable, etc.
4, welding alone cable -
Welding row a separate line and can easily block almost worse, because in the ordinary use of the keyboard, the keyboard up and down the activities of the growing gap, the keyboard cable in the welding on the Main Board of occlusion is scheduled to spend the tin so hard and soft row One line and exclusive line of the regular activities of the welding head so that row and resulted in disconnected phone lines between key one or a combination of buttons, such as failure of failure.
5, fault detection and maintenance of key
After many years of maintenance experience, I give you several ways to detect and repair.
6, all the key failure
We all know that all the key failure of the basic principles, that is, if you press a button fixed under the circumstances, CPU you receive the key signal has become a high after the low-level, CPU in the working conditions under the command button, so that all The keys can not be used, all the keys out of two is common, and extract key corrosion, two, caused by leakage.
Detection and repair
Immersion corrosion caused by the failure of all the keys.
1) Check whether there are key areas of corrosion
There are buttons found corrosion, to deal with the washing.
2) Check whether there are abnormal side buttons
Side buttons can be easily corrosion due to sweat easily into the hands of side buttons, side buttons is corrosion, clean-up and side buttons on the side buttons to capacitance.
3) Check the end of play there is no interface corrosion
In many MTK chipset interface plug on the end of every boot signals the end of play are also easy to damp, extract all the corrosion, to the end of play or to deal with cleaning out, and so on.
a) check whether the normal voltage measurement button
Voltage is a key to a 2.8V voltage 0V, if all the keys out, there is a set of keys or all of the normal voltage is not such a failure is the number of board leakage, one or more keys in the work of the state caused.
b) use the oscilloscope measurements is key leakage
Key leakage, to use the oscilloscope measurements, oscilloscope measurements show outside 2.8V-vpp in the test were found inside 1.6V-vpp voltage leakage, treatment, cleaning the Main Board, on the keyboard to removal of all the capacitor, such as
c) start testing the health 3.5V voltage is higher than the voltage
Boot health caused by the failure of all the keys, the power is on the boot or boot can not boot off, and other health problems by measuring voltage boot Kin 1 ------ 2.3V voltage, the boot is a health or leakage caused by short circuit , First of all, whether or not-for-normal power supply, clean interface plug the end of the phone, start looking for lines and so on.
d) failure caused by bad software
Software failures, telephone switching machine to normal when the caller is unable to show calls, all the keys out, the measurement of the normal voltage, there is no leakage, by the customer, said he had received the message after the shutdown, in the boot All the key failure to see that this is obviously the fault of software, software to deal with the normal start button.
e) CPU failure caused by bad
CPU caused by the failure of all the key fault, the voltage detection button, there is no leakage, both within and outside the circle button, but there are voltage, a 2.8V voltage inner ring, outer ring has a strange 2.6V voltage This is not a software problem, Failure to deal with the following software is still the same, the CPU to increase the welding Zhi Cong is also a good thing as failure is not a bad CPU, a CPU that really put the troubleshooting.
4, even from top to bottom approach Failure Block button
Block up and down keys out even the general cleaning is more than can be two under, a group of key failure in general is to fly a seat in the end-line approach has been my personal experience in handling such a high rate of the renovation, due to the extraordinary Button operation, the key up and down easily relaxed even block or bad, is your cleaning repaired, a few days, and other customers come back, buttons and a failure or other malfunction of the key group of customers was not pleased to say that you are not technical , The following in order to deal with all the fly line only clean, even the general up and down the block on the line with more than 10, if the fly line is up to half an hour to get, so that customers can use for a year or so, I found a lot of maintenance Such a phenomenon, there are other people in the repair of several customers after the repair to me, I saw on the board after I tell their clients that, you want to deal with a one-time cleaning or the following first, but if one-time deal with fly line is we Customers know the trouble you have a high level, you have a two birds with one stone.
13, cell phone charger circuit detection and repair
1, mobile phone charger did not fault the MTK chipset also many, charging IC is a charge of 3 feet to control the foot, when the IC charge of 3 feet to detect external power supply, the turn-on charge into the IC at the same time MT6305 power of 1 foot, charging IC No. 4 feet to control the charging ,7-8 feet and 4 feet of the power battery voltage detection, through the power of the 5-6 feet to the CPU, so that the CPU switch to state-of-charge on-screen display.
2, cell phones do not charge, the charge is more than bad IC or IC charge of the foot control did not receive any external power supply voltage caused by, or for IC rechargeable inspection to check the end of the phone plug, the charge of the IC is 3 feet and tail plug to connect to check power 2 feet high it is, in charge of checking power supply voltage of 4 feet, such as whether there is
3, the charger is connected charger failure has been removed for maintenance
Chargers have been in addition to the charger to connect, MT6305 power of the charge is 6 feet detect low-level output signal pin, CPU time as a low-level received in the state of charge, the charger is connected screen, the screen shows the battery charge, When the CPU when they received a low-level display charger has been removed, the screen showed the end of the charge.
See above you know the basic history of the fault, the charger is connected to remove the charger has the following can cause failure.
1) CPU caused by Xu Han
2) The power supply caused by Xu Han
3) charge caused by bad IC
4) Play the end of corrosion caused by
4, the charger is connected to remove the charger have been failures, first check to go to the end of the phone plug, charging IC, power supply, CPU and so on, you have to blindly increase welding CPU, I have been in the maintenance charger to connect the charger has been removed When found Xu Han CPU is not a lot of failures, once used as a mobile phone customers a day that the charger is connected to remove the charger has to occur once or twice been in charge at times, I thought might be caused by the CPU Xu Han , Opened on the phone to the CPU plus welding, after the end of the deal to customers, such as four or five days, said a customer came, or appeared in the same fault, I took the CPU to open his cell phone to see if the following CPU tin point Normal CPU to go back and start welding there is no charger is connected to remove the charger has a fault, then thought for a long time they get to know why no CPU below the spot did not find dead or Xuhan point, why the Chargers Has been to remove the charger to connect, why not add welding the CPU emerged, this time to return phone customers, ten days after the card unit is back, or failure, however, do not tell their clients that the last time Long, multi-frequency, let me make the following checks for him, I carefully opened the cell phone was found charging IC testing before the end of play and have some corrosion in particular, the end of the play is very serious corrosion inside, I gave him a thorough After cleaning, is Customer SAIC looks to me that you have the money to repair my bad back, I went to repair elsewhere, I'm still not say that all low-line customers away, two or On the customer does not, then I looked at the drawings to find a way to understand the principle of charging.
4, and different power MT6318
14, MTK touch-screen circuits and maintenance
1, MTK four-wire resistive touch screen theory
Touch-screen display attached to the surface, and monitors the use of line, if the measure could touch points on the screen coordinates of the location may be based on screen display coordinates corresponding to the content or icons Touch informed of the intention. Resistive touch screens which in embedded systems with the more. Resistance touch screen is a 4-story transparent screen film complex, the bottom is a glass or plexiglass composition of the grass-roots level, is the top layer of the outer surface after hardening in order to deal with smooth plastic coating layer, the middle is the two-conductive metal layer, At the grass-roots level and above the plastic layer on the surface, the two conductive layer between many of the small transparent separation point separating them. When the fingers touch screen, the two conductive layers in touch contact points. The touch screen of the two conductive metal layer is a touch-screen face two in each of the two ends of the face coated with a silver plastic, known as the face of a pair of electrodes, if a face on the last imposed on the electrode Voltage, then the work will be formed on the surface evenly in a row parallel to the voltage distribution. As shown in Figure 1, when the X in the direction of the electrode on the last imposed a determined voltage, and the Y direction of the electrode without voltage, in parallel to the X-voltage field, contact the Department voltage value in Y + (or Y -) Last Electrode reflected by measuring the Y + on the electrode voltage to the size of the contact will be aware of the X coordinates. By the same token, when the Y added to the electrode voltage to the electrodes X and not on the voltage, by measuring the X + voltage electrodes, the contacts will be aware of the Y coordinates.
2, four-wire resistance touch screen flaws:
Resistance touch screen to the B side is often touch, touch-screen four-resistance of the B side to adopt ITO, we know that, ITO is a thin metal oxide, used in the process, will soon have a small crack, and crack once, The original current flow through the line and forced around the crack, the uniform distribution of the resulting destruction of the voltage, there is a touch screen damage, cracks for the performance of the Department are not allowed to point. With the crack and the increased number of touch-screen will gradually expire, so life is not long four-wire touch screen resistance of the main issues.
3, domestic and imported touch-screen phone is the same as resistive touch screen is, we want to maintain a very easy substitution, as long as the same size touch screen can be a substitution, below the experience of several substitution.
Now many non-brand-name screen handwriting of a high failure rate, we also encountered a lot, and the following to share with you this experience in maintenance,
MTK touch-screen common arrangement
1) 4 line of touch-screen interface for the order of X + Y + X-Y -
2) touch-screen interface 4 line order for the X-Y-X + Y +
3) touch-screen interface 4 line for the order of X + X-Y + Y -
4) Line 4 touch-screen interface for the order of X + Y-X-Y +
5) touch-screen interface 4 line order for the Y + X-X + Y -
6) touch-screen interface 4 line order for the Y-X + X-Y +.
As we meet for regular maintenance of touch screen was a problem, in fact, very simple operating principle that he can be a horizontal Y +, Y-, is a vertical X +, X-in touch screen point of view, can not help but to trouble you The purchase of touch-screen, look at him the same, that is axial to the touch screen, so to connect OK.
4, software-induced failures are also a lot of touch-screen, we can determine how bad is the touch-screen software is bad, my own experience to tell you the following.
Software failures caused by the phenomenon of
Touch-screen software failures are many, there are several characteristics
1) according to the touch screen when the number of health by a 3, 4 by 6 by 7 by 9 or a 9 by 3 or 7, according to a 7 by 3 of 9 This is caused by axial reversed, tested in the touch-screen Inspection of limitations are not allowed to deal with software on OK.
2) The touch screen can not, we go to the four touch-screen measuring voltage, in the case of the net can be detected Y + and Y-voltage 2.8V or two X +, X-voltage, and so on, the touch-screen input and output axial Voltage line proved that touch-screen has not worse, if that is inconsistent with touch-screen does not work, we can deal with the software tested on the following OK.
3) caused by the software lock-axis, can only touch-screen horizontal or vertical can not live Eng vertical line, and so on, settle axial center, is the only touch-screen rather than pressing the center of the digital afterlife is pressed to 5 The other can not deal with software on OK.
5, touch-screen hardware failure caused by the phenomenon of
1) touch-screen is no obvious damage, there is no touch-screen click the reflect, touch-screen measuring voltage is only one of the voltage on the other yo yo 0:00 a few volts, and so on, are generally caused by the touch screen for.
2) touch-screen from time to time in writing or painting intermittent phenomenon occurs when short-term line, bending, alignment, and so on, can not use touch-screen or the lower part of the upper part could not be used, and so on, have a 1.40 touch screen angle can not be used or not, c. And so on with.
3) points in the touch-screen screen from time to time does not reflect the trend, that is not reflected in the menu and so on.
More than a few of my personal experience, so you can quickly determine it is a software failure caused by hardware failure or failures, our maintenance staff is first-line speed is money, speed is a technical difference.
Five-Year Plan, the headset mode detection and repair
1, headset models are basically in a headset interface, or the end of the phone plug failures, is a multi-extract, corrosion, the end of a bad play, bad blocks caused by the headset. We repair the failure of the headset mode, it is necessary to double-check interface circuit, with million will be used to measure voltage switch and headphone Block work, and some MTK chipset design of the conversion circuit and control circuit and so on, CPU Xu Han failure caused by bad or very The small, we often see in the maintenance of software failures, and so on.
2, headphone model is CPU-controlled, CPU-MT6226BA-V1 is the control of foot feet, CPU-V1 is a foot high ban on low-level control, repairs so that we found in the headset mode, the CPU in the foot V1 Voltage 2.8V to add it.
3, headset mode rapid approach
Sent by mobile phone customers that the calls can be silent is to screen a headset symbol on my heart to understand, to open a cell phone to see some amendments, I asked the customers over there, said the amendment did not fix I did not say if the second pick up the phone motherboard, look for one with fine copper wire, copper wire in the degree of tin, with Feng Qiang 6226BA-CPU to the heating, found in a 6226BA-CPU than the CPU to find the foot of the V1 The location of fine copper wire into the power supply to find a 2.8V voltage connect, try booting the machine OK.
Description: In the same maintenance over the phone, do not fix fault is not so good looking, so if you have experienced, then according to your own experience to deal with failure, this is also to save time, save the trouble of checking, it is necessary to quickly and Decisively deal with.
16, the same way memory card and maintenance
1, circuit card is simple, from 4 to send a data clock signal, the main storage is read, when we start the mobile phone in a state of memory card inserted (card control signal into a high-low) cell phone screen Show or SD card has been inserted, such as pull-out tips, we do not often find in the maintenance of identification cards, a lot of failures in the card connector, a variety of memory card blocks, the most closed-end cards is a bad seat.
2, does not recognize card
Customers use the phone that I do not put the MP3, the following can help me, I do not recognize a memory card, open the phone is closed check card Block, SD card in the deck, I also start to identify the cards I check the back seat was found the following card connector has a control switch card, MCINS switch to connect and, when inserted into the card to time, MCINS into a low-level mobile phones have been prompted to insert SD card, and so on, I MCINS Yong Niezai feet and Then the screen showed the SD card has been inserted in the phone when you start out, or insert SD card mobile phone screen is not prompted, insert the SD card when the SD card does not reset the phone system, there will be no SD card inserted, if the shutdown in the boot on the SD card Identified, we should not overlook the maintenance of the SD card switch.
3, does not recognize card
The same is used to open the phone, measuring multimeter card Block 8 of the line-to-ground resistance and found no abnormal, start to do the measurement card 8 voltage line 6 has 2.8V voltage, there is a Grounding, is a clock signal to start in 2-3 seconds when measuring the SD card so the clock has not found foot-voltage voltage, SD card clock in the foot or boot MCINS switch detects when there are SD cards, not detected SD card in the 2-3 seconds from low into high, the clock appeared to be caused by circuit problems! After checking on the Main Board found that while there is a row of resistors and capacitors are dirty black surface, cleaning the following are found in several other countries have corrosion resistance and capacitance, capacitance measurement is one end there are two ends of the earth, the capacitor in the boot removed after the test drive SD card The normal work.
17, circuit camera and maintenance
Camera principle
CPU integrated video camera and processing systems, such as drive, CPU and camera data signals are 8-10 months, the CPU is based on the model itself and the camera set, when the mobile phone into the system to take photographs or video, there is a power of 2.8 V voltage, CPU out of the reset signal so that the camera reset for data transmission at the same time to start working into the camera.
Camera fault maintenance
We often found in maintenance, installation is not ready to spend camera, camera Screen of Death, to take photographs when dark color display screen, photographed in the picture there is time to preserve the image, save pictures and no image is black, non-screen display, such as failure , To introduce the following my own experience in maintenance.
1, the camera itself bad failures
Device is not ready to spend camera, camera Screen of Death, to take photographs when dark color display screen, photographed in the picture there is time to preserve the image, save pictures and no image is a black camera, and so bad in itself caused by failure
2, the device is not ready
Bad software, CPU or bad virtual defend, the camera does not cause the power supply.
Device is not ready when we met a lot of maintenance, we write a new version of the information wrong, that is not camera data will also be installed in place not to drive caused by the camera, the software can also cause bad device is not ready, We usually deal with the case could be a multi-media format, CPU or bad virtual defend also caused many, CPU with 25 lines to the camera, there will be a line break caused by camera failure.
3, ZT288 cell phone, camera does not come out as the screen, the screen is black, but as the picture is normal, I saw very curious, this failure is rare, especially in our maintenance is rare in general do not fault Easily move the Main Board, the maintenance of our instinct, on first look at the following format, or failure, on-line under the months to write the information into the open the boot after the camera images on the screen already had it.
4, the two do not use peer-fault camera phone, I open the board to see all the action again, there is an extract phone, camera, said peers have replaced or failure, so that the camera itself is not the problem , Open the phone to start repair, extract the cell phone in the main board, ultrasound clear that the pre-Taiwan, to look at the camera had no problem connecting Block, to start in the camera when the power supply voltage measurement is also normal, surveying connectivity Block the line of resistance to two found no resistance, is not empty my feet on the main board of the camera block out the traces of corrosion were found on board the black spot is dead, after cleaning by welding back seat The camera installed boot test drive a normal camera. Taiwan has been fixed in the amendment that Taiwan, from ultrasound, drying out after the test cameras installed, this is also normal, not a repair.
Experience: In our maintenance, pay attention to details can not be ignored, he lost, in particular those details to save you time and take up the same phone they are not repair all the big move is basically over, You must do to gain the upper hand on the details of your maintenance to improve the speed, but also to improve your technique.
18, decryption software and processing software
6226BA just in the times listed, we do not have decryption technology, is no way to repair 6226BA phone chips, the beginning of a lot of online users to read out the information on the forum, you can not write the information exchange that is not written into the boot, Information is encrypted, and that many times on the phone to the same body lying there, not a very good way, and so there is only a tool to crack, this time in my dedicated researched the beginning of the decryption technology, did not engage in a few days out Understand that no matter is not filled or emptied into FF address above can not solve the problem of decryption, in a fortuitous opportunity to have a customer used a mobile phone that I often look at the crash was anything wrong, I can open a cell phone is 6226BA The CPU I have a silly, I really 6226BA the CPU is the encryption software can not write, I have to tell customers that your phone is a software problem to deal with software, customers deal with a unified software, I gave the customer-processing software, said there are risks Some cell phone encryption is to write the software will not boot, said that customers do not you write can not write, I ran several of the maintenance shop are saying that there is no way to deal with you on this can be, you write the At this time I said you have to deal with the information needs of mobile phone a few days, the reunification of the customer, so I feel pleased but not show, I can study the following 6226BA encryption issue, because I still have a few phone did not start the 6226BA is also a CPU and his The same, so let the customer on study of the following well here. Customers can use the phone boot, the boot after a crash on the night I put the phone customer information read out by 48 after a month in the online information is not written into the boot, a boot or not, information is really Encrypted so mysterious it, I used a tool to open source data did not look to see what the beginning of a problem discovered by a few to see all the information found in the Department F00000 node. F00000 after I cleared all the information in ten FF is a six-band in the sense of space, in the decimal metric system equal to F, 255, written after the filling into the phone after only a half-day boot, the boot can be
With the normal use of the death is not, this is a new discovery, filled with new information or not boot, is not the original data, there is no decryption code out to understand, just to rest, the operator will be able to fix one, A few days later I found an on-line information and I have not found information on phone model and CPU, the same font type, I put him down in the evening I write this new information has been lying in more than a month of cell phone , The phone did not expect the boot, 6226BA the start of the CPU, I am very surprised I had the original data and information on the following comparison 7M basically the same 7M after a lot of different, I do not like the pre-7M code coverage to the original data Years after the start or not, I also found the following on the Internet have been used to break free from the machine-readable information and I like that I wrote into the boot or not, when I found that I was under the information has been declassified information I previously tried under the new information and contrast the following information is in a section 7M ago and a few other characters do not like no other, I do not like the comparison over a period of the code to cover new information, Written on the cell phone after the boot screen Tang Liang does not reflect the following after the beginning of the ammeter and not the same as the previous 40MA about the current fixed there is some Jishi Miao ammeter to move the following 20MA to 40MA to boot, I have Carefully check the source code to narrow the scope, coverage to the new address information in paragraph 48 after written into the boot of the success of the test machine, start the mobile phone, equipped with card as soon as possible a normal test drive, I was excited, happy night did not break , And two mobile phones, I found a new on-line information, the beginning of the new information not found on this abandoned, and later data also found that the two get.
This is not a story to tell you, this is my cell phone access to decrypt the beginning of the study, since then, their research has been on the phone's data encryption issues to the present, their pay has also brought rich fruit.
Good deposit from SamOnline.
First, power
At present, there are two power MTK chips, the two chip MT6305 is a MT6318 is a function of their more or less the same as in our regular maintenance to see.
Power pin map
Power boot process
Press the button when the boot after the diode turn-on, control the keyboard to detect low-level output signal, power supply and integrated circuit opened the output voltage, power supply start-up circuit is to maintain the reset signal, power supply reduction after the beginning of the normal output voltage separate ways, entering Start software, completion of the boot.
1, equipped with batteries, battery-powered start. Press the start button, so that the IC power (MTK6305) 32 feet (MTK6318) of the K7 feet high into low post, CPU to be reset after power supply, 32.768KHZ vibration from the system clock, CPU work, CPU power to the (MT6305) of 24 feet (MT6318) of the foot F9 reset signal, power supply is to maintain continuous work.
Second,
MTK chipset does not boot repair
Phone start working conditions, continued normal phone to boot, take the following four conditions: First, the work of the normal power supply IC; Second, the normal work of the clock, and the third is the normal logic circuits, software is the work of the normal four.
1, the work of the normal power supply IC
(1) MTK normal power supply IC is that there is a voltage, that is, the battery voltage or external power supply;
(2) start trigger signal, MTK boot trigger signal is low, the boot trigger signal is sent to the IC power, press the start button in, the boot will have a trigger signal changes in the level of (change from the high Low).
(3) power supply IC integrated within the general group of more controlled or controlled regulator circuit, when the boot trigger signal when the IC power regulators should have multiple output voltage output.
Power 18 # (VMEM) = 2.8V, for the character.
Power 20 # (VDD) = 2.8V, for logic.
Power 22 # (VRTC) = 1.5V, for real-time clock circuit.
Power 24 # (RESET) = 2.8V, voltage reset
Power 25 # (VTCXO) = 2.8V, for crystal 13M # 4.
Power 27 # (AVDD) = 2.8V, for logic.
Power 30 # (VREF) = 1.3V, voltage reference.
Power 33 # (PWRBB) = 1.5V voltage to maintain the boot, the CPU through the C1 feet.
Power 48 # (VCORE) = 1.8V, for the CPU.
(4) to maintain the start signal from the CPU, power supply IC has been only start after the signal to maintain in order to maintain output voltage, or cell phones will not be able to continue to boot.
2, clock circuit
There are the normal system clock. CPU clock signal by the beat is the basis of data processing, mobile phone in the clock circuit, there are two: One is the clock VCO modules, including the oscillation circuit components and crystal. When the normal power supply connection, the self-oscillation, the formation of the output signal 26MHZ; and the other is the crystal frequency integrated circuits and components, the frequency IC to be an internal power supply after the crystal oscillator circuit for start-from-IF amplification module output. 26MHZ clock after a general capacitor, resistor or amplifier supply CPU, also the supply of radio-frequency phase-locked loop circuit as a basic clock signal.
3, logic and normal work
(1) there is the normal work of the power supply. Press the start button, power supply IC output stable power supply voltage logic supply, including the CPU, FLASH and the clock circuit.
(2) there is a normal reset signal when the CPU just for the power, its internal register in the random, not the normal operation procedure, CPU reset signal must be reset. Cell phones in the reduction of the CPU are generally low-end reduction, that is, to a certain period after the clock so that a variety of internal CPU registers cleared, and then here was another high voltage, so that the CPU run the program from scratch.
(3) the main logic circuits, including CPU, FLASH, CSP. When the CPU power available, the clock and reset the three conditions, the adoption of election-chip FLASH contact with the signal through the data bus and address bus to transmit data with each other.
(4) is a software phone CPU control of the boot and features a variety of procedures, the boot process and stored in FLASH set up within, MTK's early 6205,6217,6218,6219 such as CPU, such as FLASH data encryption does not, in the late 6223's, such as CPU , 6225,6226 BA, 6228,6230, and so are the FLASH data encryption, data is encrypted with the mobile phone models are not compatible. Therefore, if the wrong software or software may not cause the phone not to boot. Of course, the software may also be caused by abnormal network does not, does not indicate that dysfunction, death, and so many of the resumption of the boot failure.
4, power is not caused by the boot
Kin start by measuring whether the power supply voltage is 3.6V, output voltage in the power measurement is normal, there is no test reset signal output voltage 2.8V, is the maintenance of high voltage signal 2.8V.
(1) failure to maintain signal
When the boot by phone keys, control the keyboard to detect low-level output signal, power supply and integrated circuit opened the output voltage, power supply start-up circuit is to maintain the reset signal, if the CPU does not maintain the output signal can cause boot release button fault shutdown , This proved not to maintain the CPU to send the signal to reach the power supply can lead to the maintenance of normal working condition.
Approach
1, MT6305 power to check the first 33 feet, MT6318 first leg A9 have to maintain voltage, if there is proof voltage CPU has to maintain the voltage sent from the generally bad power failures, power-for troubleshooting.
2, check power MT6305 first 33 feet, MT6318 first leg A9 has no voltage if there is no CPU or worse caused by Xu Han, the first Canadian solder to the CPU or CPU processing or replacement for, such as CPU.
(2) based on current key start small
When the boot by building ammeter that only reflects the current 10MA, the CPU is obviously not working, check to the CPU power supply voltage (MT6305 first 48 feet and 18 feet) (MT6318 No. J10 feet and legs G1) voltage of 1.8V, 2.8 V is normal.
Approach
Caused by the start button is mainly due to the current small-26M clock circuit caused by work.
1, MT6305 power of 25 feet if there are voltage
2, MT6305 power of 25 feet to the power supply line if-26M
3, 26M crystal clock is bad
4, whether or not the normal work of the frequency or frequency caused by the bad.
4, the normal voltage does not boot (3.6V)
Battery does not start with the work of power supply voltage of 3.7V not boot, when the voltage of 4.5V to start a mobile phone.
Approach
(1) Check power supply voltage VBAT first MT6305 # 7, # 19, # 26, # 47 voltage is low voltage of 3V or so, check the MT6305 voltage VBAT feet + B to have a load resistance is aging, corrosion, caused by bad The failure, shorted resistance to the battery installed after the normal boot.
(2) of the power failure caused by bad in itself, for a troubleshooting.
(3) Check whether the phone plug end the phenomenon of corrosion caused by short circuit
5, rise to power in a few minutes after the start of the crash, restart
When the normal start or restart a while on death, the phone does not work.
(1) to the failure of such phenomena in general we are dealing with software maintenance, software is treated the same fault, I suspect that is not bad software, written in the next after the failure is still the same, I suspect that is not the CPU Xu Han-induced, I CPU and add character to carry out welding, or failure still, I began measuring the output voltage power supply, I found that MT6305 power supply voltage of only 48 feet voltage 1V, the normal voltage is 1.8V, I take Power put on a try, the boot is not normal and the resumption of the death.
Note: The phone does not start when we should pay attention to the maintenance of the power supply output voltage, output voltage power supply to our maintenance staff is a very important figure to be the normal power supply voltage, sufficient to prove the power of good or bad, so we Inspection failure to speed up the pace, not a waste of time.
Third, the keyboard light control circuit and maintenance
Boot normal mobile phone keypad, and other non-liang, the detection of light-emitting diodes found negative for the control voltage 2.8V, cathode voltage of 3.7V, control and the negative Yong Niezi to short-liang, such as a keyboard, light-emitting diode that is normal, a fault in the negative Control side, check the power of the MT6305 of 41 feet, 41 feet and control of light-emitting diode negative side of the load resistance between short-term, double-check by the board found that there are traces of corrosion extract, and found clear after the power supply board consists of a corrosion hole lost, With a copper wire from the power of the light-emitting diodes to fly 41 feet of negative resistance load control on the troubleshooting.
Description: In the cell phone repair, is also very important details, grasp the principles and details in the maintenance of improved speed to improve their technology.
Fourth, the background screen lights control circuit and maintenance
MT6318 background signal-controlled road map
Lights in the context of cell phone applications are two basic
(1) is a step-up control circuit is a series of light-emitting diodes
(2) Multi-level control is a control IC to complete the control IC can control the 4-way voltage 4 so that the light-emitting diode light at the same time can also control the two light emitting diodes, or 4-way control of voltage to make changes in the brightness light-emitting diodes Variable low.
(3) in the regular maintenance we met the background screen is not bright lights failure, the first point of failure detection, measurement screen whether there is a voltage lights, a lot of multi-class background of the screen to control the lights, multi-level control panel lights for the line with 3-5, or Pressure is controlled by two light-ray background of the screen, so that we can determine or control is a multi-stage step-up control of the background light of the screen.
(4) screen background light is not bright lights
1) the background screen measuring voltage lights are in working order, if we are in the normal general maintenance, ordinary reactionary screen background of the screen so that the lights off caused a lot of lines.
2) the background screen control IC bad light, can not find in the accessories, we can change the way to deal with the multi-level control of the K1, K2, K3, K4, such as linking to connect to VBAT (3.7V) voltage Side, A1 is a negative side control, separate from the keyboard light control negative side, the keyboard lights in general has a negative side to control the load resistance, from one foot to power it, this does not pass the background screens load resistance of the lights is the perfect .
3) step-up screen background light control, boost control circuit or a bad driver IC or step-up coil, such as bad, if not find a corresponding accessories, we can do the change of the solution to the background screen is not bright lights, we all know Screen background signal-controlled step-up circuit of the screen is a series of background light, he can be more than 12V voltage required to light up the 4 light-emitting diodes, we screen the background of the LED lights off, into a parallel, so that you can point voltage 3V It Liang, a positive VBAT (3.7V) voltage end of the cathode separate from the keyboard light control negative side, the keyboard lights in general has a negative side to control the load resistance, from one foot to power it, this does not load Resistance screen background lights of the perfect.
Fifth, the circuit card fault detection and repair
The basic principles of work
MTK chipset, CPU has to provide circuit card SIM card data and the start signal voltage, SINDATA data signals, SIMRST reset signal, SIMCLK clock signal, SIMVCC voltage control, respectively, to the power of (MT6305) 9 feet, 10 feet, 11 feet, 12 Feet, and so on, an integrated power conversion module SIM card switch, the CPU to control SIMVCC, when the 12-foot power supply voltage 2.8V, SIN card to open the power switch conversion module is (MT6305) Power of 8 feet to the beginning of SIM cards Power, 14 feet, 15 feet, 16 feet to start output signal SIM card, SIM card is working.
Repair process
First of all, check card connector, measuring card data sitting on the line to resistance, the resistance did not prove card connector and power connector or not caused by short-term, oscilloscope measurements in the boot of 2-3 seconds can be measured card signal waveform, If there is no proof of wave power is no signal output card, check the power supply, power measuring 12 feet to see whether provided by the CPU voltage waveform, a waveform prove bad for power supply, no waves caused by Xu Han check whether the CPU or the CPU and the power of Interruption caused by the line, if the disconnect between the CPU and power supply you can find on a 2.8V power supply voltage from 12 feet, the second 2-3 start in measuring the power of 8 feet, 14 feet, 15 feet, 16 feet Card connector or a normal wave.
1, does not recognize card
Immersion is a mobile phone, customer identification card used to say, I open the phone to see the Main Board, was found next to the card connector corrosion, with oscilloscope waveform measurement card connector, three signal lines are low voltage waveform of the leakage, Multimeter used to detect signals in the card-to-ground capacitance, capacitance-to-earth removed troubleshooting.
2, arising from the non-recognition software card
Boot normal phone also did not find any other anomalies that do not identify card, open the phone card connector on the measurement of resistance to normal, oscilloscope waveform measurements found no wave, was also considered to be caused by a bad power supply in the boot 2 -- 3 seconds measured 12 feet of power has not found 2.8V voltage power source in the 9 feet, 10 feet, 11 feet and no wave is not a bad CPU, CPU to try to add the following welding how to test failure Or do not recognize the same card, it is the CPU it does not work in our industry has a habit of maintenance, as appears to be a hardware failure to deal with the software that I was an on-line information was loaded into power after the card identification card boot A.
3, Power caused by the non-recognition card
Bad power supply caused by the non-recognition cards, not-for-power deal can not fault identification card, the principle is power, there are circuit switched data card, the card and control signals from the CPU, by the CPU to power the output power out there.
The following graphic
Power in the identification card is not bad, not-for-power can also get it in the power of 9 feet, 10 feet, 11 feet, and so on from the CPU card from the three signals were received on card connector, in taking on a 2.8V power supply Voltage in the power of 14 feet, 15 feet, 16 feet card output broken foot, boot test drive all the normal identification card, in the maintenance of two-phone card to be alone when they found the problem, not through the power card signal from the CPU card directly to the conversion on the circuit.
4, two-maintenance card non-circuit detection and identification card maintenance
Two-card to be double-or dual-card single question, and so on, in the maintenance and repair single-card mode, dual-CPU are two CPU at the same time, start-up in the main CPU when the first post-paid start in the CPU, through the power circuit card The output, dual-card to be double-or single-output power when there is a signal to the dual-card circuit card in the card connector from the CPU control, dual-CPU single-CPU and the difference is that the CPU's have a single card conversion circuit, so that Phone cards to achieve double-double to be double or single card to be a switch card or 2 cards work in our maintenance, especially in dual-CPU single card to be double-or single-card circuit to be the conversion module (MT6302) a lot of problems because he VBAT directly to a battery power supply is likely to result in high current, leakage, short circuit, and other damage.
5, double, single card is not to be identified cards 2
Customers use mobile phone customers by phone, said a fall below 2 does not recognize the card, check card to open the phone's 2-to-ground resistance is normal, with 2 card oscilloscope measurements found no power supply voltage waveform, a card in the power supply Card 2 feet from the boot test, 2 cards can work, as mobile phone system switch card and a card 2 also normal.
Sixth, testing and maintenance of radio frequency circuit
The straight drive often to see the built-in antenna, there are basically two kinds of built-in antenna.
Preface: mobile phone antenna must be selected frequency circuit board and the resistance, if not in strong signal when the normal communication in weak signal when the signal-to-call diving, no service call, such as intermittent failure in our maintenance in a lot of people do not Take note of this fact, often higher rates of mobile phone renovation.
1, the election-frequency antenna circuit
As we often say that maintenance is frequently the election circuit, according to the theory is that the antenna matching circuit, generally 75 or so in Europe, we have two common.
2, in order to better send and receive electromagnetic waves, the parallel resonant capacitor in the circuit boards of the two very open to inductance for the oscillator. Capacitive distribution to achieve compatibility, - the GSM-band EGSM (low-fat, higher 880 ~ 915 MHz and 925 ~ 960 MHz) plus DCS (issued 1 710 ~ 1 785 MHz, received 1805 ~ 1 885 MHz), total Antenna on the request for DualBand (880 ~ 960 MHz, 1 710 ~ 1 880 MHz). Therefore, there are two inductors for a sparse density of the coil to meet the two-frequency band to send to receive.
3, cell phone antenna matching, the radio frequency band signal circuits, as well as the band device duplex to the phone in a different band of radio frequency signals connected to the antenna. One of the radio frequency signal circuits, respectively, with corresponding matching circuit, making the radio-frequency signal circuit by the launch of the antenna, the antenna receiving the signal characteristics will not affect each other. See here, everyone should know that the antenna and antenna matching circuit principle, we often met in the maintenance of such a situation, MTK chipsets.
3, antenna switch to switch the role of the band, the separation of receiving, signals the launch, in many cases because we do not have time for the antenna switch will direct the short, but some models because the receiver, launching another signal interference can cause signal weak , When the signal-to-call diving in weak signal areas such as mobile phone service without fault.
4, note: R1 for the 100-200? resistor, Q1.Q2 the old antenna switch, is looking for two (fast diodes) can, working principle is the fast diode switches from the role, in order to receive control for low-end power Ping, the switch does not work, to receive signals transmitted directly to receive a filter, when fired high for the fast turn-on diodes, power amplifier output directly from the antenna to launch out to receive such a launch could signal an independent, non - Interference. Fast diode work with the general principle is the same as diodes, but ordinary diode switches in a state of the reverse recovery time is longer, about 4 ~ 5ms, can not meet the high-frequency switching circuits. Fast diode rectifier mainly used in high-frequency, high-frequency switching power supply, high-frequency RC snubber circuit, inverter circuits, and so on, the reverse recovery time of up to 10ns. Fast diode include fast recovery diode and Schottky diodes.
5, antenna and antenna switch, filters, and other common cause of failure
1, signals diving
2, weak signal
3, firing difficult
4, intermittent firing
5, no signal
6, firing off
7, found gateway machine
Trouble is, and so on and the antenna matching circuit caused about.
Seven, IF principle of supply and maintenance
1, MT6129 four-band transceiver channels, mainly in GSM850, E-GSM-900, DCS1800-PCS1900MHz its receiving circuit, including selective circuit, the circuit switch (antenna switching) filter circuits such as filtering, MT6129 chip integrated with the launch of the reception circuit And the frequency synthesizer circuit, to enlarge Clock circuit and so on, and there are MT6129 regulator modules radiofrequency, VBAT from 6129 to 3 feet and 15 feet to provide 3.8V voltage, CPU T1 by the output VCXOEN foot control signal to the 6129 14-foot control 6129 RF internal voltage regulator power supply circuit work, 4 feet by the output VCC-RF2.8V, 16-pin output VCC-SYN2.8V, power supply from 27 feet ADD2.8V power output of 6129 to 37 feet for the 6129 IQ module to provide power supply circuits.
2, MT6139 in the MT6129, based on the four-band transceiver channels, mainly in GSM850, E-GSM-900, DCS1800-PCS1900MHz its receiving circuit, including selective circuit, the circuit switch (antenna switching) filter circuits such as filtering, MT6139 chip With the launch of the reception circuit and frequency synthesizer circuit, AFC and the clock amplifier and so on, 26M crystal clock and the General MT6129, a different shock is not the same way, MT6129 is the power supply shocks after the production of 26M into the IF frequency, MT6139's 26M is a crystal clock circuit 26M have access to the frequency of the frequency, 26M crystal clock has no direct power supply to three feet of a grounding pin output, MT6139 RF power supply is a regulator and a separate module.
3, the experience of maintenance: no maintenance of the mobile phone signal, must be selective circuit, receiving circuit, firing circuit to keep clean, there is no other flux, as are the use of high-frequency radio frequency circuit original, this will result in no signal, weak signals, Signal diving, firing difficulties, such as network failure, mainly due to failures caused by the election of the inductor circuit frequency, high-frequency capacitance, and so on, or removed for cause and does not match the impedance of the antenna, then hit the difficulties caused by the main reason.
4, quickly determine fault, IF we receive a foot of a leave Inductor take on the antenna, IF output will then launch a false antenna and boot test machine to see whether there is a cell phone signal and launch, and so on, if there is evidence has-IF front-end Issues such as antenna switching, filter receiver, to receive high-frequency capacitance, power amplifier and so on. If there is no signal, we suspected IF, 26M, CPU, software, which is divided into two major pieces of failure to narrow the scope of the failures in maintenance-free radio frequency signals, such as failure to quickly determine the point of failure.
5, MT chipset RF circuit repair my own experience
MTK chipset, the RF part of the circuit's IC mainly IF two chips: MT6129; Second, the MT6139.
No quick to judge the signal, without firing, weak signals, such as failure to fight the emergency phone
First of all, we open the phone first look below to see some of the radio frequency.
1) to see whether the radio frequency part of the clean
2) to see there is no other maintenance personnel have been revised
3) to see there are no places Corrosion extract
4) view the mobile phone is not original or Shuaiguo out of a catch or not
5) Check more attention to further understand the scope of failure
6, Jin-free 288 phone signal
Reflected by the customer before January extract, is looking to open a mobile phone chipset MTK, the main version has traces of corrosion, oxidation spot some of the components or circuits, such as broken, first of all, after the board clean boot, the boot through the current reaction and There is no signal screen, we know that MTK is not installed in the phone cards as long as there is time to start signal will be displayed, by detecting frequency signal oscilloscope input waveform has received hopping signals that the fundamental frequency of normal, careful testing found that the filter And inductors are traces of corrosion, the filter inductance and scored from the boot after the welding display the signal to put on a network card can be called normal.
Experience: Immersion corrosion in the maintenance of the radio frequency circuit, in the absence of failure should not be found on the frequency, antenna switch, power amplifier to carry out additional raids like welding, which will lead to corrosion of the original off, disconnected lines, such as corrosion, Some components or a bad motherboard, you have to bring a long slow process of repair.
7, transit ZT886 dual-card-free cell phone signal
Customers are used to crash, the screen has been bad for the screen, the screen for no signal, no current search network, the radio frequency part of the inspection did not find any abnormality, by their own experience, the general crash is the big thing is that Easily broken or delayed, such as welding, I would let CPU plus welding, machine failure test remains the same, said customers in the absence of prior to the fall also can be used to fight a good answer the phone, I would like CPU is not a welding trailer to a CPU Cong Zhi-tin solder in the back after the test machine is not the same signal, this time I used the oscilloscope measurements to receive the signal frequency, intermediate frequency receiver in the foot after another antenna or no false signals in the frequency feet will then launch a false signal to the antenna or not, the blame It is not a bad frequency, for a first look, or the same frequency and the CPU is not a short-circuit or clock problem, 26M measuring voltage 2.8V, measured in the frequency 26M is also normal, think of all of a sudden on-line measurement never 26M This is not quasi-26.00000000M, previous online surveys are 25.900000000M-25.9999999999 about 26M to the frequency of such quasi-line test is not, except in the AFC can find out when disconnected, and then think of the AFC signal, 26M measurement 26M won the AFC on foot to prevent the infinite is that the CPU is no signal to the AFC on 26M, 26M fly CPU won control of the AFC feet, boot test machine had received a phone call signal normalized.
Experience
CPU output from the AFC automatic frequency control signals, to adjust the frequency of 26M to reach the intermediate frequency mixer circuit work needs to receive the signal frequency tracking and locking, follow-up phase with the lock, and so on, the frequency is in a stable, we 26M measurement when the AFC after the foot off the Quasi is a measurement.
8, there is no signal the launch
CECT-368 double-double to be mobile, use a folding machine to see the new machine Moyoudongguo, the cards are installed on two-out do not call the failure of the launch, both cards can access, CPU is the 6225A, is the frequency MT6139, is the power amplifier PF08155B, suspected amplifier is not broken or industrial problems in the first intermediate frequency on leave after another antenna, then try to call a normal machine, which has proved to be amplifier, first in the oscilloscope measurements found the net in the amplifier Industrial foot found weak voltage waveform is not caused by the CPU, find the cause of the problem is the industrial control signals are provided by the CPU, the CPU plus the following welding failure is still the same, it is a software problem, not many would like to format the following In that format after the failure is still the same, then the next in line to write data into a boot dual boot machine test cards can be a normal calls.
Experience: We have not launched to deal with the problem, first of all to watch whether the radio frequency part of the unusual circumstances, (refers to the abnormal situation, extract, corrosion, there are obvious components of the damage, etc.) If not, the following measuring frequency of firing pin and output Amplification of the Industrial feet to determine the scope of failure to gain a better understanding after the start in the repair, do not add to large areas of welding, which can cause unnecessary losses, a waste of time.
9, no signal
One customer used the T168 mobile phone, CPU is 6226BA, IF is MT6129C, power amplifier is the RF3146, to open a cell phone to see very much of the repair, said customers in the repair before the signal is also from time to time so that they do not repair the signal of At this time I board the radio frequency part of the cleansing of all the following, do not look at the filter is used to connect the line, when I boot test drive found the signal, the signal is the weakness of the test call was also normal, weak signal That is the filter problem, in other motherboard down on a filter 900M, welding machine on the test signal over the normal cells also fired, a happy heart, the capacity to pay the next day, said a customer came in the home did not signal a The signal to go out there, the antenna is not a good catch, open the phone antenna is detected, the antenna to receive a number of election-frequency circuit capacitors and inductors of the two did not, the problem is not caused by, so to get a large capacitors and inductors Welding up after the normal test drive, type the following for customers to go back, go back to the customer does not come, proved to be selected frequency antenna circuit does not match the rise in weak signal of the signal he did not, in strong signal when the signal is over The grid.
Experience: We repair to the attention of radio frequency part of some of the details, one antenna, the antenna is a selective circuit, is a three-antenna switch, is a four-filter attaches great importance to this, five radio frequency circuit to be clean.
Eight, MTK low power shutdown
1, low-voltage mobile phones will soon prompt start off, this time on his cell phone turned off, the phone is not turned on.
MTK in the cause of the CPU has two voltage detection pin is a high detection, is a low-level detection, when the CPU-D6 not detected when high, CPU as the initiative on low-voltage shutdown, MTK-CPU There MT6205, MT6217, MT6218 are generally 104 resistance, MT6219, the general CPU in the next two to do resistance testing voltage, MT6226, MT6225, MT6228-CPU power MT6305 in the use of the general resistance of the two has to do voltage detection, MT6226, MT6225, MT6228-CPU in 6318 the use of power, there is a direct power supply to provide the high voltage.
2, MTK low maintenance shutdown is about to experience:
1) General is about to shut down a lot of low-power CPU is caused by Xu Han. Canadian approach to welding Zhi Cong CPU or CPU.
2) The software also can cause bad low-power shutdown failure to deal with the following format or software, written from the heart, and other information.
3) Detection of exclusion (exclusion 104) caused by the bad low-power shutdown, for exclusion (General MT6205, MT6217, MT6218) with the more exclusive group.
4) MT6219, MT6225A, MT6226, MT6228, and other low-power shutdown is usually caused by bad testing resistance, resistance to replace.
5) MT6219, MT6225A, MT6226, MT6228, and other low-power shutdown resistance testing has not caused a lot of voltage, resistance is not bad, we can take on a 2.8V power supply voltage to give him the OK.
6) MT6219, MT6225A, MT6226, MT6228 use the power MTK6318 usually caused by a bad power supply, and some not-for-power can deal with failures, first of all, when we start to measure the power around and see that no large capacitor voltage, that is, MT6139 L4 the foot if they did not have a voltage when you are next to the measurement of capacitance voltage 2.8V if you can draw on his try-voltage, if we can rule out the possibility that failure to prove the feet, MTK6139 power output of a battery voltage detection In the next to the power supply filter capacitor, as long as it is to find the capacitor to a voltage of 2.8V can be resolved by a low-power shutdown fault.
Nine, microphone and earpiece circuit repair
1, the first measurement of whether the damage to the microphone, you can use digital multimeter 2K files, then transfer Hong Bi-positive, negative and total access, digital multimeter numerical display, and then his mouth, then Blow Digital Multimeter changes in the value of the show. Shows that normal microphone.
2, a lot of bad cell phone microphone main reason is that the extract caused by corrosion or broken.
3, microphone in the stand-by phone when there is no voltage, in a phone call can be measured when the microphone out of the cathode voltage of about 1.8V-2.8V voltage, if there is no measuring voltage or power supply may be disconnected resistance Caused by the bad.
4, in the phone call, the microphone cathode voltage is normal, then send or sent to the voice of small words such as failure, usually have a microphone circuit caused by the leakage, paying particular attention to the microphone circuit-to-ground capacitance, Capacitance-to-ground fault caused a lot of leakage.
5, send microphone, the normal voltage, through telephone touch method used to find the reasons for failure, in the open when the phone Yong Niezi iron or touch the original microphone circuit in the phone to hear whether or not you have a touch with the original voices reflect If there proved to be a transmitter circuit problem is the absence of audio processing system, MTK chipset is the integrated audio processor in the CPU in, CPU or bad, Xu Han, then send the rise.
6, then send the MTK chipset, is the largest number of failures, caused by the software, then send or send voice so small and so are a lot of failures, so we sent in maintenance, then failure to pay attention to a few points above it.
10, MTK receiver circuit
MTK receiver circuit is very simple, CPU integrates audio processing module, the handset has audio signal directly from the CPU out, we did not repair the handset in the voice of the first to use handset multimeter resistance measurement to determine whether good or bad handset, measuring in the main board of the handset A \ B resistance point to determine whether the motherboard caused by short-term, with 10,086 dial desk in the oscilloscope to measure when the handset on the motherboard A \ B point there is no sound waves to determine whether the CPU is the problem, CPU Zhi Cong and so on, or for Approach.
11, MTK chipset music IC enlarge
1, MTK chipset to enlarge the music has more than 10 kinds of IC, I, for example on a common double, a single-or two-channel music to enlarge IC maintenance mode, the amplification of music IC 8 feet to 9 feet, 9 feet of two hours is a central point is grounded, is a central point of access VBAT voltage, we often encounter problems in maintenance.
2, MTK chipset with integrated MP3 music processing module, CPU's T3 terminal control and A15, B15 two-channel output, output music to zoom zoom IC output out to see if it is simple to do with the very complex, the first music IC amplification is very small, pin-not grasp the direction, once the foot-fault caused by welding current, welding technology can not result in the following short-circuit, 9, called the amplification of music, there are two IC, you can board the IC measurement center Then the ground is still the power to determine what music you use the zoom IC, 9 feet of the center of IC and two feet or take over the earth, and other such power to tell a good direction. So if there is no music, first detected the following input in the amplification of music around the IC has resistors or capacitors in general is input, oscilloscope measurements there is no sound wave, there is evidence to enlarge IC bad music, such as the CPU has not requested additional welding and so on.
3, MTK chipset with integrated MP3 music processing module music noise distortion great failure to understand the principle point of amplifier, we know that in the amplifier input enter a weak signal, amplified by the amplifier output to the speakers that we can hear the Zhener Sound, if brought out the amplifier input, such as failure or leakage, there is the voice of the amplifier output or the exchange of voice, and so much noise, noise in general is not a big music amplification IC caused by the bad is to enlarge the input signal IC caused by the inspection found that music There are black corrosion input capacitance, capacitance to be replaced after the normal music.
4, musical sound glitch
Customers by phone before the show music sounds great, the next day when all of a sudden the voice of a small, as long as we maintain in the cloud is on the small voices, there is no music in general is a direct amplification of music-for-IC, I changed the music is still very small, is Music is not the IC input in question, I major in computer audio input line used to receive mobile phone music IC input, so that the mobile phone play music, but still small voice, touch Yong Niezi music of the IC input found Great voice, this proved not bad music IC, the fault lies with the input, MTK have a CPU chip output signal of the music is not a bad CPU, the first increase in the following welding that the increase after the welding boot normally play music music A.
Fault: small voices in music, music without fault in the first music of the IC input signal into a look at music is not-for-IC, if that is normal CPU failures.
5, software failures are not ringing music
The fault is obvious software fault, because there is ringing voice, play music is sound, first of all to deal with the following software format, or as the failure to find a later written into the information the OK.
Little experience maintain
Maintenance of our music to enlarge the IC, I used my side of the tool is a computer sound, the computer's audio input received phone music of the IC input Do not forget ground, so your mobile phone, play music, you have a computer Stereo sound on the come, so you can more easily determine the CPU is the music or the issue of the IC.
12, the keyboard circuit testing and maintenance experience
MTK chipset, the following points about the keyboard
1, main board-style keyboard
Main Board-keyboard, and is one of the main board, MTK chipsets used in cell phones, many are also many failures, the board-type keyboard, many shortcomings, we often use the keyboard, especially good people who send text messages, according to the hand in the keys Pressure on the board so that the deformation caused by malfunctioning keys, Xu Han components, do not start to operate when the lock button, and other failures, said the key MTK chipset is almost no protection circuit, there are only a few places on the capacitor, the button directly to the CPU-side control .
2, single-socket keyboard
Keyboard-Sockets alone, the fault often lies with the seat up and down, frequently used keys is likely to result in a failure of one or more key group of key failure of failure, the reasons for the frequent use of the keyboard so that the keyboard loose Block up and down link will appear after one or a combination of Failure of key failures.
3, single-cable connection
Single-cable connection of the few bad, that is caused, such as broken, extract, in the maintenance of regular activities, causing damage to the keyboard cable, etc.
4, welding alone cable -
Welding row a separate line and can easily block almost worse, because in the ordinary use of the keyboard, the keyboard up and down the activities of the growing gap, the keyboard cable in the welding on the Main Board of occlusion is scheduled to spend the tin so hard and soft row One line and exclusive line of the regular activities of the welding head so that row and resulted in disconnected phone lines between key one or a combination of buttons, such as failure of failure.
5, fault detection and maintenance of key
After many years of maintenance experience, I give you several ways to detect and repair.
6, all the key failure
We all know that all the key failure of the basic principles, that is, if you press a button fixed under the circumstances, CPU you receive the key signal has become a high after the low-level, CPU in the working conditions under the command button, so that all The keys can not be used, all the keys out of two is common, and extract key corrosion, two, caused by leakage.
Detection and repair
Immersion corrosion caused by the failure of all the keys.
1) Check whether there are key areas of corrosion
There are buttons found corrosion, to deal with the washing.
2) Check whether there are abnormal side buttons
Side buttons can be easily corrosion due to sweat easily into the hands of side buttons, side buttons is corrosion, clean-up and side buttons on the side buttons to capacitance.
3) Check the end of play there is no interface corrosion
In many MTK chipset interface plug on the end of every boot signals the end of play are also easy to damp, extract all the corrosion, to the end of play or to deal with cleaning out, and so on.
a) check whether the normal voltage measurement button
Voltage is a key to a 2.8V voltage 0V, if all the keys out, there is a set of keys or all of the normal voltage is not such a failure is the number of board leakage, one or more keys in the work of the state caused.
b) use the oscilloscope measurements is key leakage
Key leakage, to use the oscilloscope measurements, oscilloscope measurements show outside 2.8V-vpp in the test were found inside 1.6V-vpp voltage leakage, treatment, cleaning the Main Board, on the keyboard to removal of all the capacitor, such as
c) start testing the health 3.5V voltage is higher than the voltage
Boot health caused by the failure of all the keys, the power is on the boot or boot can not boot off, and other health problems by measuring voltage boot Kin 1 ------ 2.3V voltage, the boot is a health or leakage caused by short circuit , First of all, whether or not-for-normal power supply, clean interface plug the end of the phone, start looking for lines and so on.
d) failure caused by bad software
Software failures, telephone switching machine to normal when the caller is unable to show calls, all the keys out, the measurement of the normal voltage, there is no leakage, by the customer, said he had received the message after the shutdown, in the boot All the key failure to see that this is obviously the fault of software, software to deal with the normal start button.
e) CPU failure caused by bad
CPU caused by the failure of all the key fault, the voltage detection button, there is no leakage, both within and outside the circle button, but there are voltage, a 2.8V voltage inner ring, outer ring has a strange 2.6V voltage This is not a software problem, Failure to deal with the following software is still the same, the CPU to increase the welding Zhi Cong is also a good thing as failure is not a bad CPU, a CPU that really put the troubleshooting.
4, even from top to bottom approach Failure Block button
Block up and down keys out even the general cleaning is more than can be two under, a group of key failure in general is to fly a seat in the end-line approach has been my personal experience in handling such a high rate of the renovation, due to the extraordinary Button operation, the key up and down easily relaxed even block or bad, is your cleaning repaired, a few days, and other customers come back, buttons and a failure or other malfunction of the key group of customers was not pleased to say that you are not technical , The following in order to deal with all the fly line only clean, even the general up and down the block on the line with more than 10, if the fly line is up to half an hour to get, so that customers can use for a year or so, I found a lot of maintenance Such a phenomenon, there are other people in the repair of several customers after the repair to me, I saw on the board after I tell their clients that, you want to deal with a one-time cleaning or the following first, but if one-time deal with fly line is we Customers know the trouble you have a high level, you have a two birds with one stone.
13, cell phone charger circuit detection and repair
1, mobile phone charger did not fault the MTK chipset also many, charging IC is a charge of 3 feet to control the foot, when the IC charge of 3 feet to detect external power supply, the turn-on charge into the IC at the same time MT6305 power of 1 foot, charging IC No. 4 feet to control the charging ,7-8 feet and 4 feet of the power battery voltage detection, through the power of the 5-6 feet to the CPU, so that the CPU switch to state-of-charge on-screen display.
2, cell phones do not charge, the charge is more than bad IC or IC charge of the foot control did not receive any external power supply voltage caused by, or for IC rechargeable inspection to check the end of the phone plug, the charge of the IC is 3 feet and tail plug to connect to check power 2 feet high it is, in charge of checking power supply voltage of 4 feet, such as whether there is
3, the charger is connected charger failure has been removed for maintenance
Chargers have been in addition to the charger to connect, MT6305 power of the charge is 6 feet detect low-level output signal pin, CPU time as a low-level received in the state of charge, the charger is connected screen, the screen shows the battery charge, When the CPU when they received a low-level display charger has been removed, the screen showed the end of the charge.
See above you know the basic history of the fault, the charger is connected to remove the charger has the following can cause failure.
1) CPU caused by Xu Han
2) The power supply caused by Xu Han
3) charge caused by bad IC
4) Play the end of corrosion caused by
4, the charger is connected to remove the charger have been failures, first check to go to the end of the phone plug, charging IC, power supply, CPU and so on, you have to blindly increase welding CPU, I have been in the maintenance charger to connect the charger has been removed When found Xu Han CPU is not a lot of failures, once used as a mobile phone customers a day that the charger is connected to remove the charger has to occur once or twice been in charge at times, I thought might be caused by the CPU Xu Han , Opened on the phone to the CPU plus welding, after the end of the deal to customers, such as four or five days, said a customer came, or appeared in the same fault, I took the CPU to open his cell phone to see if the following CPU tin point Normal CPU to go back and start welding there is no charger is connected to remove the charger has a fault, then thought for a long time they get to know why no CPU below the spot did not find dead or Xuhan point, why the Chargers Has been to remove the charger to connect, why not add welding the CPU emerged, this time to return phone customers, ten days after the card unit is back, or failure, however, do not tell their clients that the last time Long, multi-frequency, let me make the following checks for him, I carefully opened the cell phone was found charging IC testing before the end of play and have some corrosion in particular, the end of the play is very serious corrosion inside, I gave him a thorough After cleaning, is Customer SAIC looks to me that you have the money to repair my bad back, I went to repair elsewhere, I'm still not say that all low-line customers away, two or On the customer does not, then I looked at the drawings to find a way to understand the principle of charging.
4, and different power MT6318
14, MTK touch-screen circuits and maintenance
1, MTK four-wire resistive touch screen theory
Touch-screen display attached to the surface, and monitors the use of line, if the measure could touch points on the screen coordinates of the location may be based on screen display coordinates corresponding to the content or icons Touch informed of the intention. Resistive touch screens which in embedded systems with the more. Resistance touch screen is a 4-story transparent screen film complex, the bottom is a glass or plexiglass composition of the grass-roots level, is the top layer of the outer surface after hardening in order to deal with smooth plastic coating layer, the middle is the two-conductive metal layer, At the grass-roots level and above the plastic layer on the surface, the two conductive layer between many of the small transparent separation point separating them. When the fingers touch screen, the two conductive layers in touch contact points. The touch screen of the two conductive metal layer is a touch-screen face two in each of the two ends of the face coated with a silver plastic, known as the face of a pair of electrodes, if a face on the last imposed on the electrode Voltage, then the work will be formed on the surface evenly in a row parallel to the voltage distribution. As shown in Figure 1, when the X in the direction of the electrode on the last imposed a determined voltage, and the Y direction of the electrode without voltage, in parallel to the X-voltage field, contact the Department voltage value in Y + (or Y -) Last Electrode reflected by measuring the Y + on the electrode voltage to the size of the contact will be aware of the X coordinates. By the same token, when the Y added to the electrode voltage to the electrodes X and not on the voltage, by measuring the X + voltage electrodes, the contacts will be aware of the Y coordinates.
2, four-wire resistance touch screen flaws:
Resistance touch screen to the B side is often touch, touch-screen four-resistance of the B side to adopt ITO, we know that, ITO is a thin metal oxide, used in the process, will soon have a small crack, and crack once, The original current flow through the line and forced around the crack, the uniform distribution of the resulting destruction of the voltage, there is a touch screen damage, cracks for the performance of the Department are not allowed to point. With the crack and the increased number of touch-screen will gradually expire, so life is not long four-wire touch screen resistance of the main issues.
3, domestic and imported touch-screen phone is the same as resistive touch screen is, we want to maintain a very easy substitution, as long as the same size touch screen can be a substitution, below the experience of several substitution.
Now many non-brand-name screen handwriting of a high failure rate, we also encountered a lot, and the following to share with you this experience in maintenance,
MTK touch-screen common arrangement
1) 4 line of touch-screen interface for the order of X + Y + X-Y -
2) touch-screen interface 4 line order for the X-Y-X + Y +
3) touch-screen interface 4 line for the order of X + X-Y + Y -
4) Line 4 touch-screen interface for the order of X + Y-X-Y +
5) touch-screen interface 4 line order for the Y + X-X + Y -
6) touch-screen interface 4 line order for the Y-X + X-Y +.
As we meet for regular maintenance of touch screen was a problem, in fact, very simple operating principle that he can be a horizontal Y +, Y-, is a vertical X +, X-in touch screen point of view, can not help but to trouble you The purchase of touch-screen, look at him the same, that is axial to the touch screen, so to connect OK.
4, software-induced failures are also a lot of touch-screen, we can determine how bad is the touch-screen software is bad, my own experience to tell you the following.
Software failures caused by the phenomenon of
Touch-screen software failures are many, there are several characteristics
1) according to the touch screen when the number of health by a 3, 4 by 6 by 7 by 9 or a 9 by 3 or 7, according to a 7 by 3 of 9 This is caused by axial reversed, tested in the touch-screen Inspection of limitations are not allowed to deal with software on OK.
2) The touch screen can not, we go to the four touch-screen measuring voltage, in the case of the net can be detected Y + and Y-voltage 2.8V or two X +, X-voltage, and so on, the touch-screen input and output axial Voltage line proved that touch-screen has not worse, if that is inconsistent with touch-screen does not work, we can deal with the software tested on the following OK.
3) caused by the software lock-axis, can only touch-screen horizontal or vertical can not live Eng vertical line, and so on, settle axial center, is the only touch-screen rather than pressing the center of the digital afterlife is pressed to 5 The other can not deal with software on OK.
5, touch-screen hardware failure caused by the phenomenon of
1) touch-screen is no obvious damage, there is no touch-screen click the reflect, touch-screen measuring voltage is only one of the voltage on the other yo yo 0:00 a few volts, and so on, are generally caused by the touch screen for.
2) touch-screen from time to time in writing or painting intermittent phenomenon occurs when short-term line, bending, alignment, and so on, can not use touch-screen or the lower part of the upper part could not be used, and so on, have a 1.40 touch screen angle can not be used or not, c. And so on with.
3) points in the touch-screen screen from time to time does not reflect the trend, that is not reflected in the menu and so on.
More than a few of my personal experience, so you can quickly determine it is a software failure caused by hardware failure or failures, our maintenance staff is first-line speed is money, speed is a technical difference.
Five-Year Plan, the headset mode detection and repair
1, headset models are basically in a headset interface, or the end of the phone plug failures, is a multi-extract, corrosion, the end of a bad play, bad blocks caused by the headset. We repair the failure of the headset mode, it is necessary to double-check interface circuit, with million will be used to measure voltage switch and headphone Block work, and some MTK chipset design of the conversion circuit and control circuit and so on, CPU Xu Han failure caused by bad or very The small, we often see in the maintenance of software failures, and so on.
2, headphone model is CPU-controlled, CPU-MT6226BA-V1 is the control of foot feet, CPU-V1 is a foot high ban on low-level control, repairs so that we found in the headset mode, the CPU in the foot V1 Voltage 2.8V to add it.
3, headset mode rapid approach
Sent by mobile phone customers that the calls can be silent is to screen a headset symbol on my heart to understand, to open a cell phone to see some amendments, I asked the customers over there, said the amendment did not fix I did not say if the second pick up the phone motherboard, look for one with fine copper wire, copper wire in the degree of tin, with Feng Qiang 6226BA-CPU to the heating, found in a 6226BA-CPU than the CPU to find the foot of the V1 The location of fine copper wire into the power supply to find a 2.8V voltage connect, try booting the machine OK.
Description: In the same maintenance over the phone, do not fix fault is not so good looking, so if you have experienced, then according to your own experience to deal with failure, this is also to save time, save the trouble of checking, it is necessary to quickly and Decisively deal with.
16, the same way memory card and maintenance
1, circuit card is simple, from 4 to send a data clock signal, the main storage is read, when we start the mobile phone in a state of memory card inserted (card control signal into a high-low) cell phone screen Show or SD card has been inserted, such as pull-out tips, we do not often find in the maintenance of identification cards, a lot of failures in the card connector, a variety of memory card blocks, the most closed-end cards is a bad seat.
2, does not recognize card
Customers use the phone that I do not put the MP3, the following can help me, I do not recognize a memory card, open the phone is closed check card Block, SD card in the deck, I also start to identify the cards I check the back seat was found the following card connector has a control switch card, MCINS switch to connect and, when inserted into the card to time, MCINS into a low-level mobile phones have been prompted to insert SD card, and so on, I MCINS Yong Niezai feet and Then the screen showed the SD card has been inserted in the phone when you start out, or insert SD card mobile phone screen is not prompted, insert the SD card when the SD card does not reset the phone system, there will be no SD card inserted, if the shutdown in the boot on the SD card Identified, we should not overlook the maintenance of the SD card switch.
3, does not recognize card
The same is used to open the phone, measuring multimeter card Block 8 of the line-to-ground resistance and found no abnormal, start to do the measurement card 8 voltage line 6 has 2.8V voltage, there is a Grounding, is a clock signal to start in 2-3 seconds when measuring the SD card so the clock has not found foot-voltage voltage, SD card clock in the foot or boot MCINS switch detects when there are SD cards, not detected SD card in the 2-3 seconds from low into high, the clock appeared to be caused by circuit problems! After checking on the Main Board found that while there is a row of resistors and capacitors are dirty black surface, cleaning the following are found in several other countries have corrosion resistance and capacitance, capacitance measurement is one end there are two ends of the earth, the capacitor in the boot removed after the test drive SD card The normal work.
17, circuit camera and maintenance
Camera principle
CPU integrated video camera and processing systems, such as drive, CPU and camera data signals are 8-10 months, the CPU is based on the model itself and the camera set, when the mobile phone into the system to take photographs or video, there is a power of 2.8 V voltage, CPU out of the reset signal so that the camera reset for data transmission at the same time to start working into the camera.
Camera fault maintenance
We often found in maintenance, installation is not ready to spend camera, camera Screen of Death, to take photographs when dark color display screen, photographed in the picture there is time to preserve the image, save pictures and no image is black, non-screen display, such as failure , To introduce the following my own experience in maintenance.
1, the camera itself bad failures
Device is not ready to spend camera, camera Screen of Death, to take photographs when dark color display screen, photographed in the picture there is time to preserve the image, save pictures and no image is a black camera, and so bad in itself caused by failure
2, the device is not ready
Bad software, CPU or bad virtual defend, the camera does not cause the power supply.
Device is not ready when we met a lot of maintenance, we write a new version of the information wrong, that is not camera data will also be installed in place not to drive caused by the camera, the software can also cause bad device is not ready, We usually deal with the case could be a multi-media format, CPU or bad virtual defend also caused many, CPU with 25 lines to the camera, there will be a line break caused by camera failure.
3, ZT288 cell phone, camera does not come out as the screen, the screen is black, but as the picture is normal, I saw very curious, this failure is rare, especially in our maintenance is rare in general do not fault Easily move the Main Board, the maintenance of our instinct, on first look at the following format, or failure, on-line under the months to write the information into the open the boot after the camera images on the screen already had it.
4, the two do not use peer-fault camera phone, I open the board to see all the action again, there is an extract phone, camera, said peers have replaced or failure, so that the camera itself is not the problem , Open the phone to start repair, extract the cell phone in the main board, ultrasound clear that the pre-Taiwan, to look at the camera had no problem connecting Block, to start in the camera when the power supply voltage measurement is also normal, surveying connectivity Block the line of resistance to two found no resistance, is not empty my feet on the main board of the camera block out the traces of corrosion were found on board the black spot is dead, after cleaning by welding back seat The camera installed boot test drive a normal camera. Taiwan has been fixed in the amendment that Taiwan, from ultrasound, drying out after the test cameras installed, this is also normal, not a repair.
Experience: In our maintenance, pay attention to details can not be ignored, he lost, in particular those details to save you time and take up the same phone they are not repair all the big move is basically over, You must do to gain the upper hand on the details of your maintenance to improve the speed, but also to improve your technique.
18, decryption software and processing software
6226BA just in the times listed, we do not have decryption technology, is no way to repair 6226BA phone chips, the beginning of a lot of online users to read out the information on the forum, you can not write the information exchange that is not written into the boot, Information is encrypted, and that many times on the phone to the same body lying there, not a very good way, and so there is only a tool to crack, this time in my dedicated researched the beginning of the decryption technology, did not engage in a few days out Understand that no matter is not filled or emptied into FF address above can not solve the problem of decryption, in a fortuitous opportunity to have a customer used a mobile phone that I often look at the crash was anything wrong, I can open a cell phone is 6226BA The CPU I have a silly, I really 6226BA the CPU is the encryption software can not write, I have to tell customers that your phone is a software problem to deal with software, customers deal with a unified software, I gave the customer-processing software, said there are risks Some cell phone encryption is to write the software will not boot, said that customers do not you write can not write, I ran several of the maintenance shop are saying that there is no way to deal with you on this can be, you write the At this time I said you have to deal with the information needs of mobile phone a few days, the reunification of the customer, so I feel pleased but not show, I can study the following 6226BA encryption issue, because I still have a few phone did not start the 6226BA is also a CPU and his The same, so let the customer on study of the following well here. Customers can use the phone boot, the boot after a crash on the night I put the phone customer information read out by 48 after a month in the online information is not written into the boot, a boot or not, information is really Encrypted so mysterious it, I used a tool to open source data did not look to see what the beginning of a problem discovered by a few to see all the information found in the Department F00000 node. F00000 after I cleared all the information in ten FF is a six-band in the sense of space, in the decimal metric system equal to F, 255, written after the filling into the phone after only a half-day boot, the boot can be
With the normal use of the death is not, this is a new discovery, filled with new information or not boot, is not the original data, there is no decryption code out to understand, just to rest, the operator will be able to fix one, A few days later I found an on-line information and I have not found information on phone model and CPU, the same font type, I put him down in the evening I write this new information has been lying in more than a month of cell phone , The phone did not expect the boot, 6226BA the start of the CPU, I am very surprised I had the original data and information on the following comparison 7M basically the same 7M after a lot of different, I do not like the pre-7M code coverage to the original data Years after the start or not, I also found the following on the Internet have been used to break free from the machine-readable information and I like that I wrote into the boot or not, when I found that I was under the information has been declassified information I previously tried under the new information and contrast the following information is in a section 7M ago and a few other characters do not like no other, I do not like the comparison over a period of the code to cover new information, Written on the cell phone after the boot screen Tang Liang does not reflect the following after the beginning of the ammeter and not the same as the previous 40MA about the current fixed there is some Jishi Miao ammeter to move the following 20MA to 40MA to boot, I have Carefully check the source code to narrow the scope, coverage to the new address information in paragraph 48 after written into the boot of the success of the test machine, start the mobile phone, equipped with card as soon as possible a normal test drive, I was excited, happy night did not break , And two mobile phones, I found a new on-line information, the beginning of the new information not found on this abandoned, and later data also found that the two get.
This is not a story to tell you, this is my cell phone access to decrypt the beginning of the study, since then, their research has been on the phone's data encryption issues to the present, their pay has also brought rich fruit.
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