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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
3. TECHNICAL BRIEF.............................................................22
3.1 GENERAL DESCRIPTION.............................................................22
3.2 GSM MODE......................................................................................24
3.3 UMTS MODE ...................................................................................26
3.4 GPS RECEIVER.................................................................................29
3.5 LO GENERATION and DISTRIBUTION CIRCUIT...................29
3.6 OFF-CHIP RF COMPONENTS ....................................................29
3.7 Digital Baseband(DBB/MSM7227).........................................35
3.8 Hardware Architecture...............................................................36
3.9 Subsystem (MSM7227)...............................................................38
3.10 Power Block..................................................................................41
3.11 External memory interface....................................................46
3.12 H/W Sub System.........................................................................47
3.13 Audio and sound........................................................................54
3.14 Display............................................................................................60
3.15 Proximity Sensor ........................................................................62
3.16 Vibrators (Q-Coin Motor).........................................................63
3.17 Compass Sensor.........................................................................64
3.18 Motion Sensor.............................................................................66
3.19 Main Features..............................................................................67
4. TROUBLE SHOOTING .......................................................75
4.1 RF Component...............................................................................75
4.2 SIGNAL PATH ..................................................................................77
4.3 Checking TCXO Block..................................................................80
4.4 Checking GSM TX Module(GSM PAM + FEM) Block .......82
4.5 Checking WCDMA Block............................................................85
4.6 Checking GSM Block ...................................................................97
4.7 GPS/WIFI/BT RF Component................................................. 105
4.8 GPS/WIFI/BT SIGNAL PATH.....................................................107
4.9 GPS/WIFI/BT Trouble shooting............................................. 109
4.10 Power ON Troubleshooting ................................................ 117
4.11 Charging Trouble shooting................................................. 120
4. 12 3M AF Camera trouble......................................................... 122
4. 13 Main LCD trouble................................................................... 125
4.14 Proximity Sensor on/off trouble ....................................... 127
4.15 Motion Sensor on/off trouble............................................ 129
4.16 Compass Sensor on/off trouble........................................ 131
4.17 Q coin Motor............................................................................. 133
5. DOWNLOAD................................................................... 136
6. BLOCK DIAGRAM........................................................... 149
7. CIRCUIT DIAGRAM ........................................................ 153
8. BGA Pin Map.................................................................. 161
9. PCB LAYOUT................................................................... 165
10. RF CALIBRATION ......................................................... 169
10.1 Configuration of Tachyon.................................................... 169
10.2 How to use Tachyon............................................................... 171
11. STAND ALONE TEST .................................................... 174
12. EXPLODED VIEW & REPLACEMENT PART LIST ......... 181
12.1 EXPLODED VIEW...................................................................... 181
12.2 Replacement Parts.................................................................. 183
12.3 Accessory ................................................................................... 199
