LG KG240, Service Manual

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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 ..............................10
3. TECHNICAL BRIEF............................15
3.1 Transceiver (SI4210, U401).......................15
3.2 PAM (SKY77328, U500)........................... 19
3.3 26 MHz Clock (VCTCXO, X400)................20
3.4 Power Supplies for RF Circuits
(RF LDO, U403).........................................20
3.5 Digital Main Processor (AD6527, U102)....22
3.6 Analog Main & Power Management
Processor (AD6537B, U101) .....................28
3.7 LCD MODULE ...........................................38
3.8 Camera ......................................................39
3.9 Keypad Switch and Scanning ....................41
3.10 Microphone ..............................................42
3.11 Main Speaker...........................................42
3.12 Headset Interface ....................................43
3.13 Key Back-light Illumination.......................44
3.14 VIBRATOR ..............................................45
3.15 Bluetooth Section Description (M201) .....46
4. TROUBLE SHOOTING.......................48
4.1 RF Component ..........................................48
4.2 RX Trouble.................................................49
4.3 TX Trouble .................................................55
4.4 Power On Trouble......................................62
4.5 Bluetooth Section Trouble Shooting ..........63
4.6 Charging Trouble .......................................68
4.7 Vibrator Trouble .........................................70
4.8 LCD Trouble ..............................................72
4.9 Camera Trouble.........................................74
4.10 Speaker Trouble ......................................76
4.11 SIM Card Interface Trouble .....................78
4.12 Earphone Trouble ....................................80
4.13 KEY backlight Trouble .............................82
4.14 Receiver Trouble .....................................84
4.15 Microphone Trouble.................................86
4.16 RTC Trouble ............................................88
4.17 Folder on/off Trouble ...............................89
5. DOWNLOAD.......................................90
5.1 Download Setup ........................................90
5.2 Download Procedure .................................91
5.3 SERVICE AND CALIBRATION .................98
6. BLOCK DIAGRAM ...........................101
7. Circuit Diagram................................103
8. pcb layout.........................................111
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[MENU 7]..............................119
10. STAND ALONE TEST ....................120
10.1 Introduction ............................................120
10.2 Setting Method.......................................120
10.3 Means of Test ........................................121
11. AUTO CALIBRATION .....................123
11.1 Overview................................................123
11.2 Requirements ........................................123
11.3 Menu and Settings.................................123
11.4 AGC .......................................................125
11.5 APC .......................................................125
11.6 ADC .......................................................125
11.7 Setting....................................................125
11.8 How to do calibration .............................125
12. EXPLODED VIEW & REPLACEMENT
PART LIST ..................................... 127
12.1 Exploded View ...................................... 127
12.2 Replacement Parts ................................129
12.3 Accessory ............................................. 145
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