Table Of Contents - LG GB175 Service Manual

1. INTRODUCTION........................3
1.1 Purpose.......................................3
1.2 Regulatory Information.....................3
2. PERFORMANCE........................5
2.1 H/W Features.................................5
2.2 S/W Features.................................6
3. TECHNICAL BRIEF..................16
3.1 Digital Main Processor(
3.2 Power Amplifier Module(
3.3 Transceiver Module(
3.4 PMIC (MT6318)............................26
3.5 Memory Module (
3.6 FM Radio Module (Si4708)..............32
3.7 Antenna Switch Module (
3.8 LCD Interface...............................35
3.9 SIM& Micro SD Card Interface..........37
3.10 KEYPAD Interface.......................38
3.11 Battery Charging Block Interface.....39
3.12 Audio Interface............................40
3.13 Vibrator Interface.........................42
4. TROUBLE SHOOTING..............43
4.1 Power On Trouble.........................43
4.2 SIM Card Trouble..........................45
4.3 Vibrator Trouble............................47
4.4 Keypad Trouble............................48
4.5 RTC Trouble.................................50
4.6 Key Backlight Trouble.....................53
4.7 LCM Backlight Trouble...................56
4.8 LCM Trouble................................58
4.9 Microphone Trouble.......................60
4.10 Receiver Trouble.........................62

Table Of Contents

)..........16
MT6225
).......23
SKY77518
)..............24
AD6548
.......28
PF38F4050M0Y0CG)
).........34
B9308
4.11 Speaker Trouble..........................64
4.12 Headphone Trouble.....................66
4.13 Charging Trouble.........................69
4.14 FM Radio Trouble........................71
4.15 RF Trouble.................................73
5. DOWNLOAD............................78
5.1 Download setup...........................78
5.2 Download Process........................79
6. BLOCK DIAGRAM...................87
7. CIRCUIT DIAGRMA..................88
8. BGA IC PIN Check...................96
9. PCB LAYOUT..........................99
10.ENGINEERING MODE............101
11. CALIBRATION......................105
11.1 Test Equipment Setup.................105
11.2 Calibration Steps........................106
12. STAND ALONE TEST............145
12.1 Test Configuration......................145
12.2 META tool Install process............146
12.3 Rx Test....................................149
12.4 Tx Test.....................................153
13. EXPLODED VIEW&
REPLACEMENT PART LIST........155
13.1 Exploded View..........................155
13.2 Replacement Part list..................157
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