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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION...............................................5
1.1 Purpose......................................................................5
1.2 Regulatory Information.................................................5
2. SYSTEM SPECIFICATION.................................7
2.1 General function..........................................................7
2.2 Usable Environment.....................................................8
2.3 Radio Performance......................................................8
2.4 Current Consumption.................................................16
2.5 RSSI .........................................................................16
2.6 Battery Bar................................................................16
2.7 Sound Pressure Level ................................................17
2.8 Charging...................................................................18
3. TECHNICAL BRIEF......................................... 19
3.1 Digital Baseband(DBB) & Multimedia Processor...........19
3.2 GAM Hardware Subsystem.........................................39
3.3. Audio Part ................................................................50
3.4 GPADC(General Purpose ADC) and AUTOADC2............57
3.5 Charger control .........................................................58
3.6 Voltage Regulation.....................................................64
3.7 RF Technical Description ............................................65
4. TROUBLE SHOOTING..................................... 75
4.1 Power ON Trouble......................................................75
4.2 USB Trouble ..............................................................76
4.3 SIM Detect Trouble ....................................................77
4.4 MicroSD card Trouble ................................................78
4.5 Keypad Trouble..........................................................79
4.6 Touch Screen ............................................................80
4.7 Camera Trouble.........................................................82
4.8 Main LCD Trouble......................................................88
4.9 Keypad Backlight Trouble ...........................................90
4.10 Folder ON/OFF Trouble.............................................91
4.11 Audio Trouble Shooting ............................................93
4.12 Charger Trouble Shooting.......................................112
4.13 Checking Bluetooth Block ......................................114
4.14 Checking AGPS Block ............................................118
4.15 RF Component ......................................................121
4.16 Procedure to check ...............................................122
4.17 Checking Common Power Source Block..................123
4.18 Checking VCXO Block ............................................128
4.19 Checking Front End Module Block ..........................132
4.20 Checking Front End Module Block input logic ..........133
4.21 Checking WCDMA Block ........................................135
4.22 Checking GSM Block .............................................145
5. Download ................................................... 158
6. Block Diagram ........................................... 161
7. CIRCUIT DIAGRAM...................................... 163
8. BGA Pin Map ..............................................171
9. PCB LAYOUT ...............................................175
10. CALIBRATION............................................ 183
10.1 General Description ...............................................183
10.2 Environment..........................................................183
10.3 Calibration Environment .........................................184
10.4 Program Operation ................................................185
11. Stand-alone Test...................................... 190
11.1 General Description ...............................................190
11.2 USB Communication Setting...................................191
11.3 Program Operation ................................................192
11.4 Stand-alone Test ...................................................195
12. EXPLODED VIEW & REPLACEMENT
PART LIST .................................................197
12.1 EXPLODED VIEW ...................................................197
12.2 Replacement Parts ................................................205
12.3 Accessory .............................................................230
