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Copyright © 2010 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
1.3 Abbreviations ................................................................................... 7
2. PERFORMANCE ...................................................................9
2.1 Product Name .................................................................................. 9
2.2 Supporting Standard .................................................................... 9
2.3 Main Parts : GSM Solution ........................................................... 9
2.4 HW Features ....................................................................................10
2.5 SW Features ....................................................................................12
2.6 HW SPEC. .........................................................................................14
2.7 C320 Figures ...................................................................................15
3. TECHNICAL BRIEF .............................................................16
3.1 General Description .....................................................................16
3.2 Power management ....................................................................28
3.3 SUB SYSTEM ....................................................................................32
3.4 General Description (RF Part) ..................................................40
3.5 GSM MODE ......................................................................................41
3.6 OFF-CHIP RF COMPONENTS ....................................................44
3.7 OFF-CHIP COMPONENTS ..........................................................46
4. TROUBLE SHOOTING .......................................................50
4.1 Power ON Troubleshooting ......................................................50
4.2 Charger Troubleshooting ..........................................................52
4.3 USB Troubleshooting ..................................................................54
4.4 USIM Detect Troubleshooting .................................................56
4.5 Camera Troubleshooting ...........................................................58
4.6 Main side view LED Troubleshooting ...................................60
4.7 Slide Key side view LED Troubleshooting ...........................61
4.8 LCD Troubleshooting ..................................................................63
4.9 Vibrator Troubleshooting ..........................................................65
4.10 Receiver Path ...............................................................................67
4.11 Headset path ...............................................................................70
4.12 Speaker/Speaker Phone path ...............................................73
4.13 Main microphone ......................................................................78
4.14 Headset microphone ................................................................80
4.15 RF Component ............................................................................82
4.16 RF Path ............................................................................................83
4.17 Trouble Shooting of GSM Part ..............................................84
4.18 Checking Bluetooth Block ......................................................91
4.19 Checking FM Radio Block .......................................................96
5. DOWNLOAD ......................................................................99
6. BLOCK DIAGRAM ........................................................... 112
7. CIRCUIT DIAGRAM ........................................................ 123
8. BGA Pin Map .................................................................. 137
9. PCB LAYOUT ................................................................... 143
10. RF CALIBRATION ......................................................... 149
10.1 Usage of Tachyon for RF Calibration and Test ............. 149
11. TEST ALONE ................................................................. 152
11.1 Phone Test Mode..................................................................... 152
12. EXPLODED VIEW & REPLACEMENT PART LIST ......... 157
11.1 EXPLODED VIEW ...................................................................... 157
11.2 Replacement Parts.................................................................. 159
11.3 Accessory ................................................................................... 175