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G16(EM941) SERVICE MANUAL 

 

GSM/GPRS 900/1800MHz 

Support EDGE, only downloading. 

WAP/MMS 
GPRS Class 12 
playe

r 

MP3 player 
music library 
SRS 
Voice Recorder 
FM Radio 
Micro USB 2.0 
JAVA 

Main 

WIFI 

Blue tooth 
MSN,Yahoo messenger,Youtube, Google talk, 
Facebook,Twitter,Mini Opera,Google search 
3.5mm Audio Jack,Yamaha amplifie 

 

 

 

 

Содержание EM941

Страница 1: ...DGE only downloading WAP MMS GPRS Class 12 player MP3 player music library SRS Voice Recorder FM Radio Micro USB 2 0 JAVA Main WIFI Blue tooth MSN Yahoo messenger Youtube Google talk Facebook Twitter...

Страница 2: ...rostatic discharge can easily damage the sensitive components of electronic products Therefore every service supplier must observe the precautions which mentioned above GENERAL REPAIR INFORMATION 1 Ma...

Страница 3: ...3 DISASSEMBLY AND ASSEMBLY SERVICE TOOLS Voltage regulator Multimeter Iron 850 heater Constant temperature heater Oscillograph...

Страница 4: ...oves Wrist grounding strap Antistatic gloves Software download cable Microscope Solder wire soldering paste Metal tweezers Screw driver SRT 6 Plates Metal tweezers SRT 6 Screw driver MTK series CPU pl...

Страница 5: ...5 DISASSEMBLY Pull out battery cover Take out the screws Take off the back cover Separate the FPC connector Take off the screw Prize up the middle housing...

Страница 6: ...6 Paste the film on lens and LCD Take PCBA out of A cover Take off the main key...

Страница 7: ...7 ASSEMBLY Put the PCBA into A cover Close the FPC connector Put the cover on the PCBA Install the screw Close back cover and front cover together Install power on key...

Страница 8: ...8 FINISH Lock the screws Assemble battery cover...

Страница 9: ...9 Chapter 2 SYSTEM BLOCK DIAGRAM...

Страница 10: ...10 Chapter4 ACTUALL BOARD PCBA layout drawing A side J701 LCD connector...

Страница 11: ...11 Electronic schemes Main CPU...

Страница 12: ...12 Keypad input...

Страница 13: ...13 Oclock Electronic schemes Cable and flash connect sheet Oclock out put...

Страница 14: ...14 BT control SIM card data out put 7 2 MT6235 CPU power output...

Страница 15: ...e current Vcore 1 2v 200ma Vio 2 8v 100ma Vadd 2 8v 150ma Vtcxo 2 8v 20ma Vrtc 1 2v 200ma Vmem 2 8v 150ma Vsim 2 8v 20ma Vcs 2 8v 200ma vcs 1 8v 150ma CPU voitage and current sheet CPU SIM SIM 7 3 bat...

Страница 16: ...16 BT MODEL...

Страница 17: ...17 Audio PA U201 I O connector 5PIN...

Страница 18: ...18 PA IC RF AD6548 RF7166...

Страница 19: ...19 FM SIM card SIM 1 SIM 1power supplier SIM 1 data SIM 2 power supplier SIM 2...

Страница 20: ...20 8 0 WIFI 2 Control loop...

Страница 21: ...of master Clean or replace SIM socket Check if points of SIM card are OK NO NO NO NO YES YES YES YES OK End If SIM card is invalidation Connect to steady voltage power supply to see if current is OK P...

Страница 22: ...d of slave Clean or replace SIM socket If points of SIM are OK NO NO NO YES YES YES YES OK End If SIM card is invalidation Connect to steady voltage power supply to see if current is OK Test if voltag...

Страница 23: ...be MT6235 is fault Could not power on Re solder or replace J402 of battery Check battery point of J402 is OK NO NO NO NO YES YES YES OK End Connect to power supply if it can be power on If current is...

Страница 24: ...B206 No sound in headphone Check if C201 has sundries or damaged If there is sound when switch to loudspeaker NO NO NO NO YES YES YES YES Repulse C201 or clean it If headphone is connect OK or not Re...

Страница 25: ...h when bell works No sound of bell Remove headphone and test it by multimeter s beep function If there is sound like sasa from headphone NO NO NO YES YES YES YES Replace bell components If it is libra...

Страница 26: ...start signal from pin 13 of J601 and if 8 bit address bus is normal or not No display or display abnormal when power on Replace LCD NO NO NO OK YES YES If display interface connects OK Replace LCD FPC...

Страница 27: ...obile such as configuration of software cable power PC etc Whether mobile is power on NO NO NO NO YES YES YES YES YES OK Replace or re configure Check whether J302 connector is false solder or damaged...

Страница 28: ...receiver will have a sound 3 Key press relevant keys appear in the screen 5 Libration The cellphone will librate 6 Lond SPK there will be a sound from the speaker 7 Ring press start there will be some...

Страница 29: ...roxy Address 010 000 000 172 Username Optional Password Optional After setting as above the WAP is ready 2 MMS parameter setting instruction Premise is WAP is valid Setting process Menu Messages MMS M...

Страница 30: ...the user s Password Password of the use s E Mail B Incoming server pop3 126 com depend on the user s Email website E Mail Address Full E Mail Address of the user s Password Password of the use s E Mai...

Страница 31: ...d in your computer Contact us please when you have any queries 1 Install the USB driver if not yet 1 1 Run the USB driver without the upgrade cable plugged into the computer Figure 1 1 2 After the ins...

Страница 32: ...ence enter DEVICE UART and TST config Choose UART1 and Clink done and then the phone restarts After the phone restarts power it off 3 choose the Database of the phone s software 3 1 run Catcher exe ch...

Страница 33: ...hen you examine the master phone s problems choose the master phone software s database file and when the slave phone s problems the slave phone s database file The database in the phone must be exact...

Страница 34: ...34 Figure 8 4 2 clink button Configure RS232 in figure 9 then figure 10 occurs choose the right COM in Port option and clink OK Figure 9...

Страница 35: ...5 use the Catcher to record debug information 5 1 clink the button connect in figure 11 clink the button Default Filter in figure12 select Field Trial button in figure 13 and then clink set in Figure...

Страница 36: ...36 Figure 12 Figure 13 5 2 Clink Filter in figure 14 choose some items in figure 15 and then clink ok in figure 15 Please query us if you need to choose the filter settings...

Страница 37: ...the phone If the database in the phone is not exactly the same as the chose database in Catcher figure 16 occurs for example different software versions and wrong cable connectors lead to the differen...

Страница 38: ...seful primitive information Then the phone user carries on some operations to the phone to make the failures recur After the wanted failures occur wholly clink the button disconnect in figure 19 You c...

Страница 39: ...39 Figure 18 Figure 19...

Страница 40: ...40 Figure 20...

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