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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. Abbreviations ................................................................................... 7
2. PERFORMANCE ...................................................................9
2.1 Product Name .................................................................................. 9
2.2 Supporting Standard .................................................................... 9
2. Main Parts : GSM Solution ........................................................... 9
2.4 HW Features ....................................................................................10
2.5 SW Features ....................................................................................12
2.6 HW SPEC. .........................................................................................14
3. TECHNICAL BRIEF .............................................................22
.1 GENERAL DESCRIPTION .............................................................22
.2 GSM MODE ......................................................................................24
. UMTS MODE ...................................................................................26
.4 GPS RECEIVER .................................................................................29
.5 LO GENERATION and DISTRIBUTION CIRCUIT ...................29
.6 OFF-CHIP RF COMPONENTS ....................................................29
.7 Digital Baseband(DBB/MSM7227) .........................................5
.8 Hardware Architecture ...............................................................6
.9 Subsystem (MSM7227)...............................................................8
.10 Power Block ..................................................................................41
.11 External memory interface ....................................................46
.12 H/W Sub System .........................................................................47
.1 Audio and sound ........................................................................54
.14 Display ............................................................................................60
.15 Proximity Sensor ........................................................................62
.16 Vibrators (Q-Coin Motor) .........................................................6
.17 Compass Sensor .........................................................................64
.18 Motion Sensor .............................................................................66
.19 Main Features ..............................................................................67
4. TROUBLE SHOOTING .......................................................75
4.1 RF Component...............................................................................75
4.2 SIGNAL PATH ..................................................................................77
4. 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 M AF Camera trouble ......................................................... 122
4. 1 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 ........................................ 11
4.17 Q coin Motor ............................................................................. 1
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.................................................................. 18
12. Accessory ................................................................................... 199