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Content
CHAPTER 1 MAINBOARD WORKING PRINCIPLE................................................................................................................4
CHAPTER 2 MAINBOARD DEVICE LOCATION PLAN AND MATERIAL BOM INFORMATION................................................7
CHAPTER 3 MAINTAIN FLOW DIRECTION...................................................................................................................... 11
3.1 HOST MAINTAIN FLOW............................................................................................................................................ 11
3.2 FLASHTOOL LOAD GUIDANCE(HAVE ERASYRE FLASH OR ALL EARSURE FLASH ......................................................................13
3.3 STANDLONE VERSION WRITE STATION TOOL GUIDANCE.......................................................................................................15
3.4 WRITE CUSTOM MADE INFORMATION GUIDANCE.....................................................................................................15
CHAPTER 4 ADVANCED MAINTAIN CONDITION AND TOOL DETAILED ACCOUNT..........................................................16
CHAPTER 5 MOBILE PRINCIPLE AND MALFUNCTION ANALYSIS ..................................................................................17
5.1 FAIL TO START UP ....................................................................................................................................................17
5.1.1 NO CURRENT..................................................................................................................................................................17
5.1.2 LOWER CURRENT (DIRECT-CURRENT MAIN POWER SUPPLY) ......................................................................................19
5.1.3 LARGE CURRENT (DIRECT-CURRENT MAIN POWER SUPPLY).......................................................................................23
5.2 RESTART ON SCREEN...............................................................................................................................................26
5.3 utomatic shutdown crash ...................................................................................................................................................28
5.3.1 auto power-off...................................................................................................................................................................28
5.3.2 SYSTEM HALTED..............................................................................................................................................................30
5.4 MOBILE PHONE HOT,STANDBY TIME IS SHORT.........................................................................................................32
5.5 NOT RING ................................................................................................................................................................34
5.5.1 speaker noumenon bad......................................................................................................................................................34
5.5.2 speaker access ...................................................................................................................................................................34
5.6 NO RECEIVER ..........................................................................................................................................................37
5.7 NO SPEAKER,LOW SPEAKER VOICE .........................................................................................................................37
5.8 NO SIGNAL,FEEBLE SIGNAL ....................................................................................................................................39
5.9 NO RECOGNIZE CARD ..............................................................................................................................................41
5.9.1NO RECOGINZE SIM card.................................................................................................................................................41
5.9.2 NO RECOGNIZE TCARD...................................................................................................................................................44
5.10 NO CAMERASHOOTING.......................................................................................................................................44
5.11 TOCUH SCREEN NO WORK......................................................................................................................................46
5.12 FAIL TO CHARGE....................................................................................................................................................48
5.13 HEADSET TROUBLE...............................................................................................................................................51
5.14 FM ........................................................................................................................................................................54
5.15 GPS WIFI BT ......................................................................................................................................................56
5.16 MOTOR G-SENSOR SIDEKEY............................................................................................................................57
5.16.1 MOTOR ..........................................................................................................................................错误！未定义书签。
5.16.2 G-SENSOR ....................................................................................................................................................................58
5.16.3 SIDEKEY.........................................................................................................................................错误！未定义书签。
5.17 KEYPAD LIGHT .................................................................................................................................................59
CHAPTER 6 PCB BOARD AND BGA CHIP WELDING SPOT INDICATOR DIAGRAM ............................................................61
