
- 2 - Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION..................................................................... 3
1.1 Purpose ........................................................................................................3
1.2 Regulatory Information.........................................................................3
2. PERFORMANCE...................................................................... 5
2.1 Product Name............................................................................................5
2.2 Supporting Standard..............................................................................5
2.3 Main Parts : GSM Solution.....................................................................5
2.4 HW Features ...............................................................................................6
2.5 SW Features................................................................................................9
2.6 HW SPEC. ................................................................................................. 12
3. TROUBLE SHOOTING .......................................................... 21
3.1 RF Component ....................................................................................... 21
3.2 SIGNAL PATH........................................................................................... 23
3.3 Checking XO Block................................................................................ 26
3.4 Checking FEMID (GSM, W B1/B2/B8) Block................................. 28
3.5 Checking WCDMA Block .................................................................... 31
3.6 Checking GSM Block............................................................................ 58
3.7 GPS Trouble Shooting ......................................................................... 65
3.8 WIFI/BT Trouble Shooting.................................................................. 70
3.9 Audio Trouble ......................................................................................... 75
3.10 Camera.................................................................................................... 88
3.11 Main LCDTrouble Shooting ........................................................... 93
3.12 Touch troubleshooting..................................................................... 96
3.13 Vibrator Trouble Shooting............................................................... 99
3.14 Gyro/Accel Trouble Shooting.......................................................101
3.15 Compass sensor troubleshooting..............................................103
3.16 Proximity Sensor troubleshooting.............................................105
3.17 Power ON Troubleshooting..........................................................107
3.18 FM Trouble Shooting.......................................................................111
3.19 USBTrouble Shooting ....................................................................116
4. DOWNLOAD.......................................................................120
5. BLOCK DIAGRAM...............................................................137
6. CIRCUIT DIAGRAM ............................................................146
7. BGA PIN MAP ....................................................................162
8. PCB LAYOUT.......................................................................169
9. CALIBRATION.....................................................................173
10. HIDDEN MENU.................................................................192
11. DISASSEMBLE GUIDE......................................................199
12. EXPLODED VIEW & REPLACEMENT PART LIST .............204