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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 Functions of Major Semi-Conductors ..............................................5
2.4 HW Features ...............................................................................................6
2.5 SW Features ................................................................................................7
2.6 H/W SPEC. ................................................................................................. 10
3. TROUBLE SHOOTING .......................................................... 11
3.1 RF Components ..................................................................................... 11
3.2 LTE & WCDMA & CDMA & GSM Tx SIGNAL PATH ...................... 14
3.3 LTE & WCDMA & CDMA & GSM Rx SIGNAL PATH ...................... 15
3.4 Checking RF Tx Level ............................................................................ 17
3.5 Checking RF Tx Level (Cont.) ............................................................. 25
3.6 Checking RF PRx Level ........................................................................ 28
3.7 Checking RF DRx Level ........................................................................ 31
3.8 GPS/WIFI/BT Module ............................................................................ 34
3.9 GPS/WIFI/BT SIGNAL PATH ................................................................ 36
3.10 Checking GPS/WIFI/BT...................................................................... 37
3.11 Checking NFC ....................................................................................... 43
3. 12 SIM ........................................................................................................... 46
3. 13 Side Key ................................................................................................. 48
3. 14 USB .......................................................................................................... 50
3. 15 Gyro Sensor / Accelerometer sensor ......................................... 53
3. 16 Compass Sensor ................................................................................. 56
3. 17 Proximity/Ambient Light Sensor ................................................. 59
3. 18 Camera ................................................................................................... 62
3. 19 LCD .......................................................................................................... 68
3. 20 Touch Trouble Shooting .................................................................. 71
3. 21 Vibrator Troubleshooting ............................................................... 74
3. 22 Audio ...................................................................................................... 76
4. DOWNLOAD ......................................................................... 86
5. BLOCK DIAGRAM ..............................................................102
6. CIRCUIT DIAGRAM ............................................................111
7. BGA PIN MAP .....................................................................127
8. PCB LAYOUT .......................................................................142
9. CALIBRATION .....................................................................148
10. HIDDEN MENU .................................................................167
11. DISASSEMBLE GUIDE ......................................................172
12. EXPLODED VIEW & REPLACEMENT PART LIST .............178
