Table Of Contents - LG GD310 Service Manual

1. INTRODUCTION ............................................... 7
1.1 Purpose ......................................................................7
1.2 Regulatory Information .................................................7
1.3 ABBREVIATION ............................................................9
2. PERFORMANCE ............................................. 11
2.1 H/W Feature..............................................................11
2.2 Technical specifi cation ...............................................12
3. Technical Brief ............................................. 18
3.1. GD310 Functional Block diagram. ..............................18
3.2 Baseband Processor (BBP) Introduction ......................19
3.3 Power management IC...............................................30
3.4 Power ON/OFF ..........................................................35
3.5 SIM & uSD interface ..................................................36
3.6 Memory ....................................................................38
3.7 LCD Display ..............................................................39
3.8 Keypad Switching & Scanning ....................................40
3.9 Keypad back-light illumination ....................................41
3.10 LCD back-light illumination ......................................42
3.11 7-Segment LED module ...........................................43
3.12 JTAG & ETM interface connector ..............................44
3.13 Audio ......................................................................45
3.14 Charging circuit .......................................................48
3.15 FM radio & BLUETOOTH...........................................49
3.16 5pin Multi Media Interface connector ........................53
3.17 General Description .................................................56
3.18 Receiver part ...........................................................58
3.19 Transmitter part .......................................................59
3.20 RF synthesizer .........................................................60
3.21 DCXO .....................................................................60
3.22 Front End Module control .........................................61
3.23 Power Amplifi er Module ...........................................62
3.24 Mode Selection .......................................................63
3.25 PAM Schematic .......................................................64
4. PCB picture .................................................. 65
4.1 Main PCB component placement ................................65
4.2 F_LCD component placement ....................................66
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

Table Of Contents

5. TROUBLE SHOOTING ..................................... 67
5.1 Trouble shooting test setup ........................................67
5.2 Power on Trouble .......................................................68
5.3 Charging trouble........................................................71
5.4 LCD display trouble ...................................................54
5.5 Camera Trouble .........................................................75
5.6 Receiver & Speaker trouble ........................................77
5.7 Microphone trouble ...................................................79
5.8 Vibrator trouble ..........................................................81
5.9 Keypad back light trouble ...........................................83
5.10 SIM & uSD trouble ...................................................85
5.11 7-segment LED trouble ............................................88
5.12 Trouble shooting of Receiver part ..............................89
5.13 Trouble shooting of Transmitter part. .........................95
6. Download & S/W upgrade ......................... 104
6.1 S/W download setup ................................................104
6.2 Download program user guide ..................................105
7. Block Diagram ........................................... 116
8. CIRCUIT DIAGRAM ...................................... 117
9. BGA Pin Map .............................................. 125
10. PCB LAYOUT ............................................. 129
11. RF Calibration .......................................... 137
11.1. Test Equipment Setup ...........................................137
11.2. Calibration Step ....................................................137
12. Stand-alone Test ...................................... 142
12.1. Test Program Setting.............................................142
12.2. Tx Test .................................................................144
12.3. Rx Test .................................................................145
13. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................ 147
13.1 EXPLODED VIEW ...................................................147
13.2 Replacement Parts ................................................149
13.3 Accessory ............................................................. 242
- 5 - LGE Internal Use Only