Table Of Contents - LG GT540 Service Manual

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. Main Parts : GSM Solution ...........................................7
2.4 HW Features ...............................................................8
2.5 SW Features .............................................................10
2.6 HW SPEC. ................................................................1
3. TECHNnICAL BRIEF....................................... 19
.1 GENERAL DESCRIPTION .............................................19
.2 GSM MODE ...............................................................21
. UMTS MODE .............................................................2
.4 GPS RECEIVER ..........................................................26
.5 LO GENERATION and DISTRIBUTION CIRCUIT ..............27
.6 OFF-CHIP RF COMPONENTS ......................................28
.7 Digital Baseband(DBB/MSM7227) ..............................4
.8 Hardware Architecture ...............................................5
.9 Subsystem (MSM7227) .............................................9
.10 Power Block ............................................................42
.11 External memory interface .......................................48
.12 H/W Sub System .....................................................50
.1. Audio and sound .....................................................58
.14 Display ...................................................................65
.15 Motion Sensor .........................................................67
.16 Vibrators .................................................................68
.17 Compass Sensor .....................................................69
.18 Main Features .........................................................70
4. Trouble Shooting .......................................... 78
4.1 RF Component ..........................................................78
4.2 SIGNAL PATH ............................................................80
4. Checking TCXO Block ................................................84
4.4 Checking GSM TX Module(GSM PAM+FEM) BLOCK .....86
4.5 Checking WCDMA Block ............................................89
4.6 Checking GSM BLOCK ...............................................99
4.7 GPS/WIFI/BT RF COMPONENTS................................104
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Only for training and service purposes

Table Of Contents

4.8 GPS/WIFI/BT Trouble shooting ..................................106
4.9 Power ON Troubleshooting .......................................109
4.10 Charger Troubleshooting ........................................11
4.11 USB trouble ...........................................................116
4.12 Audio trouble .........................................................119
4.1 M AF Camera trouble ...........................................129
4.14 Main LCD trouble ..................................................12
4.15 SIM Detect Troubleshooting ....................................14
4.16 Side Key Troubleshooting .......................................16
4.17 VIBRATOR .............................................................18
4.18 Motion Sensor on/off trouble ..................................140
4.19 Compass Sensor on/off trouble ..............................142
5. Download ................................................... 144
6. Block diagram ............................................ 157
7. Circuit Diagram .......................................... 165
8. BGA Pin Map .............................................. 177
9. PCB Layout ................................................. 181
10. Calibration & RF Auto Test Program
(Tachyon) .................................................. 191
12. Exploded view & Replacement part list . 207
12.1 Exploded view .......................................................207
12.2 Replacement Parts ................................................209
12. Accessory .............................................................25
-  - LGE Internal Use Only