Table Of Contents - LG GD910 Service Manual

1. INTRODUCTION ............................................... 5
1.1 Purpose ......................................................................5
1.2 Regulatory Information .................................................5
1.3 Abbreviations ..............................................................7
2. PERFORMANCE ............................................... 9
2.1 Supporting Standard ....................................................9
2.2 Main Parts : Solution ....................................................9
2.3 H/W features ...............................................................9
2.4 HW Spec. .................................................................11
3. BB Circuit Technical brief ............................ 16
3.1 Functional Block Diagram ..........................................16
3.2 Baseband Processor Introduction ...............................17
3.3 Power management IC...............................................30
3.4 Power ON/OFF ..........................................................37
3.5 SIM Interface .............................................................38
3.6 Memory ....................................................................39
3.7 LCD Display ..............................................................40
3.8 LCD back-light illumination ........................................41
3.9 Battery voltage monitor ..............................................42
3.10 Audio ......................................................................43
3.11 5 PIN Interface connector .........................................44
4. RF Circuit Technical Brief ............................ 45
4.1 General Description ...................................................45
4.2 GSM Part ..................................................................49
4.3 WCDMA Part .............................................................53
4.4 GSM Power Amplifi er Module .....................................56
4.5 WCDMA Band1 Power Amplifi er Module .....................57
4.6 WCDMA Band1/8 Low Noise Amplifi er ........................58
4.7 WCDMA Band1 Duplexer ...........................................59
4.8 Bluetooth ..................................................................60
5. Trouble shooting .......................................... 62
5.1 Trouble shooting test setup ........................................62
5.2 Power on trouble .......................................................63
5.3 Charging Trouble .......................................................67
5.4 USB Trouble ..............................................................70
5.5 SIM Detect Trouble ....................................................72
5.6 Side Key Trouble ........................................................75
5.7 Audio Trouble ............................................................76
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Table Of Contents

5.8 Microphone Trouble ...................................................78
5.9 VGA Camera .............................................................80
5.10 Main LCD Trouble ....................................................82
5.11 Main Clock part .......................................................84
5.12 RF Component ........................................................85
5.13 RF SIGNAL PATH .....................................................86
5.14 Trouble Shooting of GSM Part ...................................87
5.15 Trouble Shooting of WCDMA Part ..............................96
5.16 Trouble shooting of Bluetooth .................................103
6. Download & S/W upgrade ......................... 106
6.1 S/W download setup ................................................106
6.2 Download program user guide ..................................107
7. Block Diagram ........................................... 110
8. CIRCUIT DIAGRAM ...................................... 111
9. BGA Pin Map .............................................. 115
10. PCB LAYOUT ............................................. 119
11. RF Calibration .......................................... 121
11.1 Test Equipment Setup ............................................121
11.2 Calibration Step .....................................................121
12. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................ 127
12.1 EXPLODED VIEW ...................................................127
12.2 Replacement Parts ................................................129
12.3 Accessory ............................................................. 145
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