Table Of Contents - LG -P940 Service Manual

1. INTRODUCTION ..................................................................... 3
1.1 Purpose ........................................................................................................3
1. Regulatory Information .........................................................................3
1.3 Abbreviations.............................................................................................5
2. PERFORMANCE ...................................................................... 7
.1 Product Name ............................................................................................7
. Supporting Standard ..............................................................................7
.3 Main Parts : GSM Solution .....................................................................7
.4 HW Features ...............................................................................................8
.5 SW Features ............................................................................................. 11
.6 HW SPEC. ................................................................................................. 14
.7 P940 Figures ............................................................................................ 5
3. TECHNICAL BRIEF ................................................................ 26
3.1 Radio Part General ................................................................................ 7
3. Radio Part Rx Section ........................................................................... 8
3.3 Radio Part Tx Section ........................................................................... 9
3.4 Radio Part Interfaces ............................................................................ 30
3.5 Digital Baseband (OMAP4430) ........................................................ 31
3.6 Hardware Architecture ........................................................................ 33
3.7 Subsystem (PMB9811_X-GOLDTM66) ....................................... 34
3.8 Power Block ............................................................................................. 47
3.9 External memory interface ................................................................ 54
3.10 Audio and sound ................................................................................ 55
3.11 Main (8M pixels) & Sub (1.6M) Camera .................................... 60
3.1 Display ..................................................................................................... 6
3.13 Vibrators.................................................................................................. 64
3.14 MHL(u-USB for HDMI) ....................................................................... 65
3.15 Compass Sensor .................................................................................. 67
3.16 Motion Sensor ...................................................................................... 68
3.17 Gyro Sensor ........................................................................................... 69
3.18 Illumination & Proximity Sensor ................................................... 70
3.19 Touch Module ...................................................................................... 71
3.0 Main Features ....................................................................................... 7
4. TROUBLE SHOOTING .......................................................... 73
4.1 RF Component ....................................................................................... 73
4. SIGNAL PATH ........................................................................................... 74
4.3 Checking TCXO Block ........................................................................... 77
4.4 Checking WCDMA Block .................................................................... 79
4.5 Checking WCDMA Block .................................................................... 86
LGE Internal Use Only

Table Of Contents

4.6 GPS/WIFI/BT RF components ........................................................... 93
4.7 GPS/WIFI/BT SIGNAL PATH ................................................................ 95
4.8 NFC .............................................................................................................. 97
4.9 Power ON Troubleshooting ............................................................... 99
4.10 Charger Troubleshooting ..............................................................103
4.11 USB Trouble shooting .....................................................................105
4.1 Audio trouble .....................................................................................107
4.13 Camera trouble(8M/1.6M) ..........................................................116
4.14 Main LCD trouble ..............................................................................10
4.15 SIM detect Trouble shooting ........................................................1
4.16 Vibrator Troubleshooting ..............................................................14
4.17 HDMI Troubleshooting ...................................................................16
4.18 Motion Sensor on/off trouble ......................................................17
4.19 Gyro/Compass sensor troubleshooting ..................................130
4.0 Proximity Sensor on/off trouble .................................................133
4.1 Illumination Sensor on/off trouble ............................................135
4. Touch trouble .....................................................................................137
5. DOWNLOAD ....................................................................... 140
6. BLOCK DIAGRAM ............................................................... 162
7. CIRCUIT DIAGRAM ............................................................ 168
8. BGA PIN MAP .................................................................... 184
9. PCB LAYOUT ....................................................................... 193
10. CALIBRATION ................................................................... 201
10.1 Configuration of Tachyon ..............................................................01
10. How to use Tachyon .........................................................................03
11. HIDDEN MENU ................................................................. 207
12. EXPLODED VIEW & REPLACEMENT PART LIST ............. 233
1.1 EXPLODED VIEW ................................................................................33
1. Replacement Parts ...........................................................................41
1.3 Accessory .............................................................................................73
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