Table Of Contents - LG KG800 Service Manual

1. INTRODUCTION ...............................5
1.1 Purpose .................................................. 5
1.2 Regulatory Information............................ 5
1.3 Abbreviations .......................................... 7
2. PERFORMANCE...............................9
2.1 H/W Features...........................................9
2.2 Technical Specification ..........................10
3. TECHNICAL BRIEF ........................15
3.1 Power Transceiver ................................15
3.2 13 MHz Clock.........................................22
3.3 Switchplexer for Triband ........................22
3.4 Digital Main Processor ...........................24
3.5 Analog Main & Power Management
Processor...............................................30
3.6 Charging IC............................................37
3.7 CAMERA IC ...........................................40
3.8 MIDI IC...................................................42
3.9 Keypad Switches and Scanning ............46
3.10 Microphone ..........................................47
3.11 Main Speaker.......................................47
3.12 IO Interface ......................................... 48
3.13 EL DRIVER IC .....................................49
3.14 MEMORY.............................................50
3.15 BLUETOOTH .......................................51
3.16 LCD BACKLIGHT, FLASH LED
CHARGE PUMP ..................................52
3.17 SLIDE SWITCH (U205) .......................53
3.18 VIBRATOR...........................................54
3.19 MULTIMEDIA MIC ...............................55
4. TROUBLESHOOTING ....................56
4.1 RX Trouble.............................................56
4.2 TX Trouble .............................................62
4.3 Power On Trouble..................................69
4.4 Charging Trouble ...................................71
4.5 Vibrator Trouble .....................................73
4.6 LCD Trouble.......................................... 75
4.7 BT Trouble .............................................78
4.8 Speaker Trouble ....................................81
4.9 SIM Card Interface Trouble....................84
4.10 Earphone Trouble ................................86
4.11 EL Trouble ...........................................89
4.12 Receiver Trouble..................................91

Table Of Contents

- 3 -
4.13 Microphone Trouble .............................94
4.14 RTC Trouble ........................................96
4.15 Navigation KEY Problem .....................98
5. DOWNLOAD.....................................100
6. BLOCK DIAGRAM ........................106
7. Circuit Diagram ............................107
8. pcb layout .....................................120
9. ENGINEERING MODE ..................135
9.1 BB Test [MENU 1]................................136
9.2 RF Test [MENU 2]................................138
9.3 MF mode [MENU 3] .............................138
9.4 Trace option [MENU 4] ........................139
9.5 Call timer [MENU 5] .............................139
9.6 Fact. Reset [MENU 6] ..........................139
9.7 S/W version..........................................139
10. STAND ALONE TEST .................140
10.1 Introduction ........................................140
10.2 Setting Method...................................140
10.3 Means of Test ....................................141
11. CALIBRATION.............................143
12. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 151
12.1 Exploded View .................................. 151
12.2 Replacement Parts ............................153
12.3 Accessory ......................................... 173