LG KG320, Service Manual

Page: 2 / 148

- 3 -
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 Transceiver (SI4210, U401).......................15
3.2 Power Amplifier (SKY77328, U400) ......... 20
3.3 26 MHz Clock (VCTCXO, X400)................22
3.4 FEM for Triband(FL400) ............................22
3.5 Digital Main Processor
(AD6527B, U102) ......................................24
3.5 Analog Main & Power Management
Processor (AD6535, U101)........................29
3.6 Charging IC (ISL6299, U205) ....................37
3.7 CAMERA IC(AIT811T,U103) .....................40
3.8 MIDI IC(YMU787,U202).............................42
3.9 Keypad Switches and Scanning ................46
3.10 Microphone ..............................................47
3.11 Main Speaker...........................................47
3.12 Headset Interface ....................................48
3.13 MEMORY(TOSHIBA, U204)....................49
3.14 BLUETOOTH(LBMA-2C67B2,U202).......50
3.15 CAMERA CONNECTOR, CAMERA
LDO(CN202,U201) ..................................51
3.16 KEY BACKLIGHT ....................................52
3.17 WHITE/FLASH LED LDO ........................52
3.18 FLIP SWITCH (U105) ..............................53
3.19 VIBRATOR ..............................................53
4. TROUBLE SHOOTING.......................54
4.1 RX Trouble.................................................54
4.2 TX Trouble .................................................60
4.3 Power On Trouble......................................67
4.4 Charging Trouble .......................................69
4.5 Vibrator Trouble .........................................71
4.6 LCD Trouble ..............................................73
4.7 BT Trouble .................................................76
4.8 Speaker Trouble ........................................79
4.9 SIM Card Interface Trouble .......................81
4.10 Earphone Trouble ....................................83
4.11 Receiver Trouble .....................................85
4.12 Microphone Trouble.................................87
4.13 RTC Trouble ............................................89
4.14 Camera and Flash Trouble ......................91
5. DOWNLOAD AND CALIBRATION.....94
5.1 Download...................................................94
6. BLOCK DIAGRAM .............................99
7. Circuit Diagram................................101
8. pcb layout ........................................108
9. ENGINEERING MODE......................115
9.1 BB Test [MENU 1] ...................................116
9.2 RF Test [MENU 2] ...................................118
9.3 MF mode [MENU 3] .................................118
9.4 Trace option [MENU 4] ............................119
9.5 Call timer [MENU 5] .................................119
9.6 Fact. Reset [MENU 6]..............................119
9.7 S/W version .............................................119
10. STAND ALONE TEST ....................130
10.1 Introduction ............................................120
10.2 Setting Method.......................................120
10.3 Means of Test ........................................121
11. AUTO CALIBRATION .....................123
11.1 Calibration..............................................123
11.2 AGC .......................................................127
11.3 APC .......................................................127
11.4 ADC .......................................................127
11.5 Setting....................................................127
11.6 How to do calibration .............................127
12. EXPLODED VIEW & REPLACEMENT
PART LIST ..................................... 129
12.1 Exploded View ...................................... 129
12.2 Replacement Parts ................................131
12.3 Accessory ............................................. 147
Table Of Contents