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Copyright © 2011 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
1.3 Abbreviations.............................................................................................5
2. PERFORMANCE ...................................................................... 7
2.1 Product Name ............................................................................................7
2.2 Supporting Standard ..............................................................................7
2.3 Main Parts : GSM Solution .....................................................................7
2.4 HW Features ...............................................................................................8
2.5 SW Features ............................................................................................. 10
2.6 HW SPEC. ................................................................................................. 14
3. TECHNICAL BRIEF ................................................................ 25
3.1 GENERAL DESCRIPTION ...................................................................... 25
3.2 GSM MODE .............................................................................................. 28
3.3 UMTS MODE ............................................................................................ 31
3.4 GPS RECEIVER.......................................................................................... 33
3.5 LO GENERATION and DISTRIBUTION CIRCUIT............................ 37
3.6 OFF-CHIP RF COMPONENTS ............................................................. 39
3.7 Digital Baseband(DBB/MSM7227) .................................................. 44
3.8 Hardware Architecture ........................................................................ 46
3.9 Subsystem (MSM7227) ....................................................................... 48
3.10 Power Block ........................................................................................... 59
3.11 External memory interface ............................................................. 65
3.12 H/W Sub System .................................................................................. 66
3.13 Audio and sound ................................................................................ 82
3.14 Display ..................................................................................................... 89
3.14 Main (5M pixels) & Sub (2M pixels) Camera ............................. 93
3.16 Vibrator ................................................................................................... 96
3.17 Compass Sensor .................................................................................. 97
3.18 Motion Sensor ...................................................................................... 98
3.19 Gyro Sensor ........................................................................................... 99
3.20 Proximity Sensor ...............................................................................100
3.21 Illumination Sensor ..........................................................................101
3.22 Touch Module ....................................................................................102
3.23 Main Features .....................................................................................103
4. TROUBLE SHOOTING ........................................................ 106
4.1 RF Component .....................................................................................106
4.2 SIGNAL PATH .........................................................................................107
4.3 Checking TCXO Block .........................................................................109
4.4 Checking GSM TX Module(GSM PAM + FEM) Block ..............111
4.5 Checking WCDMA Block ..................................................................114
4.6 Checking GSM Block ..........................................................................125
4.7 GPS/WIFI/BT RF components .........................................................133
4.8 GPS/WIFI/BT SIGNAL PATH ..............................................................135
4.9 Power ON troubleshooting .............................................................137
4.10 Charger Troubleshooting ..............................................................140
4.11 USB Trouble shooting .....................................................................143
4.12 Audio trouble .....................................................................................147
4.13 Camera troubleshooting ...............................................................158
4.14 Main LCD trouble ..............................................................................161
4.15 SIM detect Trouble shooting ........................................................164
4.16 Side Key Trouble shooting ............................................................168
4.17 Vibrator Troubleshooting ..............................................................170
4.18 Motion sensor troubleshooting ..................................................173
4.19 Gyro/Compass sensor troubleshooting ..................................175
4.20 Proximity Sensor on/off trouble .................................................178
4.21 Illumination Sensor on/off trouble ............................................180
4.22 Touch trouble .....................................................................................182
5. DOWNLOAD .......................................................................184
6. BLOCK DIAGRAM ...............................................................203
7. CIRCUIT DIAGRAM ............................................................206
8. BGA Pin Map ......................................................................219
9. PCB LAYOUT ....................................................................... 224
10. CALIBRATION ...................................................................234
10.1 General Description .........................................................................234
10.2 Requirement .......................................................................................234
10.3 Setup for RF calibration ..................................................................235
10.4 Tachyon Software Installation .....................................................235
10.5 Tachyon Start ......................................................................................236
10.6 Overview of RF Calibration ...........................................................240
11. HIDDEN MENU .................................................................245
12. EXPLODED VIEW & REPLACEMENT PART LIST .............253
12.1 EXPLODED VIEW ................................................................................253
12.2 Replacement Parts ...........................................................................254
12.3 Accessory .............................................................................................295
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