LG KC550, Руководство по обслуживанию, Страница: 4 / 183

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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1. INTRODUCTION ...............................7
1.1 Purpose .................................................. 7
1.2 Regulatory Information............................ 7
1.3 ABBREVIATION ..................................... 9
2. GENERAL PERFORMANCE ..........11
2.1 H/W Features.........................................11
2.2 Technical specification...........................12
3. TECHNICAL BRIEF ........................19
3.1 KC550 Component Block diagram.........19
3.2 Main Chip Introduction ...........................20
3.3 Baseband Part Introduction ...................22
3.4 Power Management Unit .......................38
3.5 Power ON/OFF ......................................43
3.6 SIM interface..........................................47
3.7 Memory ..................................................48
3.8 LCD Display ...........................................50
3.9 Keypad Switching & Scanning ...............53
3.10 Keypad back-light illumination .............54
3.11 LCD back-light illumination ..................55
3.12 JTAG interface connector ....................57
3.13 Audio....................................................58
3.14 USB charging circuit ............................62
3.15 BLUETOOTH .......................................63
3.16 FM Radio..............................................66
3.17 Micro SD external memory card slot....67
3.18 18pin Multi Media Interface
connector .............................................69
4. RF circuit technical brief ...............71
4.1 General Description ...............................71
4.2 Receiver part..........................................73
4.3 Transmitter part......................................74
4.4 RF synthesizer .......................................75
4.5 DCXO.....................................................76
4.6 Front End Module control.......................76
4.7 Power Amplifier Module .........................77
4.8 Mode Selection ......................................78
5. PCB layout......................................79
5.1 Main PCB component placement ..........79
6. Trouble shooting............................84
6.1 Trouble shooting test setup....................84
6.2 Power on Trouble...................................85
6.3 Charging trouble ....................................88
6.4 LCD display trouble................................90
6.5 Camera Trouble .....................................93
6.6 Receiver & Speaker trouble ...................95
6.7 Microphone trouble ................................97
6.8 Ear-MIc Jack Detection trouble..............98
6.9 Vibrator trouble ......................................99
6.10 Keypad back light trouble...................100
6.11 SIM & uSD trouble .............................103
6.12 RF Troubleshooting ...........................106
6.13 RF Receiver path Troubleshooting ....110
6.14 RF Transmitter path Troubleshooting 113
7. Download & S/W upgrade...............118
7.1 Download program user guide.............118
7.2 Multi-Download Program Setting .........119
8. CIRCUIT DIAGRAM ......................121
9. BGM PIN MAP...............................131
10. PCB LAYOUT ..............................137
11. RF Calibration.............................145
11.1 Test Equipment Setup .......................145
11.2 Calibration Step .................................145
12. Stand-alone Test ........................151
12.1 Test Program Setting .........................151
12.2 Tx Test ...............................................153
12.3 Rx Test...............................................154
13. ENGINEERING MODE ................155
14. EXPLODED VIEW &
REPLACEMENT PART LIST ......157
14.1 Exploded View ...................................157
14.2 Replacement Parts ............................159
14.3 Accessory ..........................................182
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