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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 : Solution
............................................................................5
2.4 HW Features ...............................................................................................6
2.5 SW Features ................................................................................................8
2.6 HW SPEC ................................................................................................... 10
3. TROUBLE SHOOTING .......................................................... 20
3.1RF Component ........................................................................................ 20
3.2 SIGNAL PATH ........................................................................................... 21
3.3 Checking XO Block ................................................................................ 22
3.4 Checking FEMID (GSM, W B1/B2/B5/B8) Block ......................... 26
3.5 Checking WCDMA Block .................................................................... 28
3.6 Checking WCDMA Block .................................................................... 53
3.7 GPS/WIFI/BT RF component ............................................................. 57
3.8 GPS/WIFI/BT SIGNAL PATH ................................................................ 58
3.9 GPS/WIFI/BTTroubleshooting .......................................................... 60
3.10 Audio ....................................................................................................... 64
3.11 Main Camera Trouble Shooting .................................................... 72
3.12 Main LCD Trouble Shooting ........................................................... 74
3.13 Touch troubleshooting ..................................................................... 86
3.14 Accel&Compass sensor troubleshooting .................................. 78
3.15 Proximity Sensor troubleshooting............................................... 80
3.16 Power ON Troubleshooting ............................................................ 82
3.17 Charging Troubleshooting .............................................................. 86
3.18 USB Trouble shooting ....................................................................... 88
4. DOWNLOAD ......................................................................... 91
5. BLOCK DIAGRAM ...............................................................108
6. CIRCUIT DIAGRAM ............................................................116
7. BGA PIN MAP ....................................................................132
8. PCB LAYOUT .......................................................................136
9. CALIBRATION .....................................................................140
10. DISASSEMBLE GUIDE ......................................................159
11. EXPLODED VIEW & REPLACEMENT PART LIST .............164