LG KG920 - Default Chapter; Table of Contents

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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 ..............................18
3. TECHNICAL BRIEF............................23
3.1 Transceiver (SI4210) .................................23
3.2 PAM (SKY77328) ..................................... 27
3.3 26 26 MHz Clock (VCTCXO) .....................28
3.4 Power Supplies for RF Circuits (RF LDO) .28
3.5 Digital Main Processor (AD6527B) ............30
3.6 Analog Main & Power Management
Processor (AD6535) ..................................36
3.7 Battery Charging Block ..............................43
3.8 MUMTI-MEDIA INTERFACE .....................47
3.9 MIDI IC(YMU787) ......................................59
3.10 MEMORY
(512Mbits NOR + 128Mbits PSRAM) ......63
3.11 Keypad Switches and Scanning ..............66
3.12 Main Microphone .....................................68
3.13 Main Receiver..........................................69
3.14 Headset Interface ....................................70
3.15 BLUETOOTH(LBMA-2C67B2) ................71
3.16 Mini-SD ....................................................72
3.17 FLIP SWITCH ..........................................73
3.18 VIBRATOR ..............................................74
3.19 Audio CODEC..........................................74
3.20 KEY backlight ..........................................75
4. TROUBLE SHOOTING.......................76
4.1 RF Component ..........................................76
4.2 BT Trouble .................................................86
4.3 Power On Trouble......................................89
4.4 Charging Trouble .......................................91
4.5 Vibrator Trouble .........................................93
4.6 SIM Card Trouble ......................................95
4.7 KEY backlight Trouble ...............................97
4.8 Side KEY backlight Trouble (SUB board) ..99
4.9 RTC Trouble ............................................101
4.10 Swivel Trouble .......................................103
4.11 LCD Trouble ..........................................105
4.12 Camera Trouble.....................................108
4.13 Speaker Trouble ....................................120
4.14 Headphone Trouble ...............................122
4.15 Receiver Trouble ...................................124
4.16 Microphone Trouble...............................126
5. DOWNLOAD AND CALIBRATION...128
5.1 Download.................................................128
5.2 Calibration................................................134
6. BLOCK DIAGRAM ...........................140
7. Circuit Diagram................................141
8. pcb layout ........................................149
9. ENGINEERING MODE .....................157
9.1 About Engineering Mode .........................157
9.2 Access Codes..........................................157
9.3 Key Operation..........................................157
9.4 Engineering Mode Menu Tree .................157
9.5 BB Test [MENU 1] ...................................158
9.6 RF Test [MENU 2] ...................................160
9.7 MF mode [MENU 3] .................................160
9.8 Trace option [MENU 4] ............................161
9.9 Call timer [MENU 5] .................................161
9.10 Fact. Reset [MENU 6]............................162
9.11 S/W version [MENU 7]...........................162
9.12 MM S/W Download [MENU 8] ...............162
12. EXPLODED VIEW & REPLACEMENT
PART LIST ..................................... 163
12.1 Exploded View ...................................... 163
12.2 Replacement Parts ................................165
12.3 Accessory ............................................. 194
Table Of Contents