LG GW620 - Default Chapter; Table of Contents

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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
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. ................................................................12
3. Technical Brief .............................................18
3.1 GENERAL DESCRIPTION .............................................18
3.2 GSM MODE ...............................................................20
3.3 UMTS MODE .............................................................24
3.4 LO GENERATION and DISTRIBUTION CIRCUIT ..............27
3.5 OFF-CHIP RF COMPONENTS ......................................28
3.6 GPS MODE ...............................................................32
3.7 GPS/WIFI/BT OFF-CHIP RF COMPONENTS ..................33
3.8 FM Transceiver ..........................................................36
3.9 Digital Baseband(DBB/MSM7200A)Q ..........................38
3.10 Hardware Architecture .............................................39
3.11 Subsystem(MSM7200A) ..........................................43
3.12 Power Block ............................................................46
3.13 External memory interface .......................................52
3.14 H/W Sub System .....................................................53
3.15 Audio and sound .....................................................67
3.16. Proximity Sensor .....................................................76
3.17. Luminance Sensor ..................................................77
3.18. Motion Sensor ........................................................78
3.19 Vibrators .................................................................79
3.20 Compass Sensor .....................................................80
3.21 Main Features .........................................................81
4. TROUBLE SHOOTING ..................................... 89
4.1 RF Component ..........................................................89
4.2 SIGNAL PATH ............................................................91
4.3 Checking TCXO Block ................................................95
4.4 Checking GSM TX Module(GSM PAM + FEM) Block .....97
4.5 Checking WCDMA Block ..........................................100
4.6 Checking GSM Block ...............................................112
4.7 GPS/WIFI/BT RF components ...................................120
4.8 GPS/WIFI/BT SIGNAL PATH ......................................122
4.9 GPS/WIFI/BT Trouble shooting ..................................124
4.10 Power ON Troubleshooting .....................................133
4.11 Charger Troubleshooting ........................................137
4.12. USB trouble ..........................................................140
4.13. Audio troubleQ .....................................................143
4. 14. 5M Camera trouble ..............................................153
4. 15. Main LCD trouble .................................................157
4.16 SIM Detect Troubleshooting ....................................159
4.17 Side Key Troubleshooting .......................................161
4.18 VIBRATORS ...........................................................163
4.19. Proximity Sensor on/off trouble ..............................164
4.20. Luminance Sensor on/off trouble ...........................166
4.21. Motion Sensor on/off trouble .................................168
4.22. Compass Sensor on/off trouble ..............................170
5. DOWNLOAD & S/W UPGRADE .....................172
6. Block Diagram ...........................................197
7. CIRCUIT DIAGRAM ...................................... 207
8. BGA Pin Map ..............................................219
9. PCB LAYOUT ............................................... 225
10. Calibration & RF Auto Test Program
(Tachyon) .................................................. 233
11. Stand-alone Test ...................................... 238
12. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................ 251
12.1 EXPLODED VIEW ...................................................251
12.2 Replacement Parts ................................................253
12.3 Accessory ............................................................. 282