1 OBJECTIVE 3
2 SCOPE 3
3 GENERAL DESCRIPTIONS 3
3.1 PRODUCT OVERVIEW 4
3.2 PRODUCT TECHNICAL PARAMETERS 4
3.3 PHONE PART EXPLODED PICTURE 5
3.4 PART FIGURE 6
3.5 DISASSEMBLE INSTRUCTION 7
3.6 XXXX PCBA OVERVIEW 10
4 XXXX PRINCIPLE AND TROUBLESHOOTING 12
4.1 MOBILE VOLTAGE OUT PUT 12
4.2 PMU OUTPUT VOLTAGE 13
4.3 RECEIVER PRINCIPLE AND TROUBLESHOOTING 14
4.4 TROUBLE SHOOTING TO RECEIVER CIRCUIT 18
4.5 TRANSMITTER PRINCIPLE AND TROUBLESHOOTING 18
4.6 TRANSMITTER CIRCUIT TROUBLESHOOTING 21
4.7 LOGIC CIRCUIT PRINCIPLE AND TROUBLESHOOTING 22
4.7.1 PHONE CAN NOT POWER ON 22
4.7.2 VIBRATOR ISSUE 23
4.7.3 NO KEY FUNCTION 24
4.7.4 KEY PAD BACKLIGHT ISSUE. 25
4.7.5 MICROPHONE HAS NO FUNCTION 26
4.7.6 Touch Panel Issue 28
4.7.7 SIM CARD ISSUE 27
4.7.8 LCD NO DISPLAY 29
4.7.9 LCD BACKLIGHT NO FUNCTION 31
4.7.10 SPEAKER & RECEIVER NO FUNCTION 30
4.7.11 T-FLASH CARD ISSUE 31
4.7.12 CAMERA HAS NO FUNCTION: 32
4.7.13 BLUE TOOTH HAS NO FUNCTION 33
4.7.14 TV&FM ISSUE 34
4.8 TROUBLE DESCRIPTIONS (ABBREVIATION) LIS 38
4.9 USB CONNECTION DEFINITION 39
5 MAPPING DRAWING 40