Table Of Contents - LG E900 Service Manual

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. .........................................................................................15
2.7 LG-E900 Figures .............................................................................21
3. TECHNICAL BRIEF .............................................................22
.1 RF GENERAL DESCRIPTION .......................................................22
.2 GSM MODE ......................................................................................24
. UMTS MODEE .................................................................................28
.4 GPS MODE .......................................................................................1
.5 OFF-CHIP RF COMPONENTS ....................................................2
.6 Digital Baseband(DBB/QSD8650) ..........................................6
.7 Hardware Architecture ...............................................................7
.8 Microprocessor Subsytem(QSD8650) ..................................40
.9 Power Block.....................................................................................41
.10 H/W Sub System .........................................................................46
.11 Audio and sound ........................................................................50
.12 Display ............................................................................................54
.1 Proximity Sensor ........................................................................55
.14 Light Sensor .................................................................................55
.15 Motion Sensor (Three-axis-accelerometer) .....................56
.16 Compass Sensor .........................................................................56
.17 LG -E900 Main Features ..........................................................58
.18 Main Component .......................................................................59
4. TROUBLE SHOOTING .......................................................62
4.1 RF Component...............................................................................62
4.2 SIGNAL PATH ..................................................................................64
4. Checking TCXO Block ..................................................................68
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Only for training and service purposes

Table Of Contents

4.4 Checking FEM Block ....................................................................70
4.5 Checking WCDMA Block ............................................................7
4.6 Checking GSM Block ...................................................................84
4. 7 GPS/WIFI/BT/FM Radio RF components ............................92
4.8 GPS/WIFI/BT Signal path ...........................................................94
4. 9 GPS/WIFI/BT Trouble shooting ...............................................96
4.10 Power ON Troubleshooting ................................................ 105
4.11 Charger Troubleshooting .................................................... 108
4.12 USB trouble................................................................................ 111
4.1 Audio trouble ........................................................................... 11
4.14 5M Camera trouble ................................................................ 12
4.15 Main LCD trouble .................................................................... 125
4.16 SIM Detect Troubleshooting .............................................. 127
4.17 Key Troubleshooting ............................................................. 129
4.18 VIBRATOR .................................................................................... 10
4.19 Proximity Sensor on/off trouble ....................................... 11
4.20 Luminance Sensor on/off trouble .................................... 1
4.21 Motion Sensor on/off trouble ............................................ 15
5. DOWNLOAD ................................................................... 137
6. BLOCK DIAGRAM ........................................................... 150
7. CIRCUIT DIAGRAM ........................................................ 159
8. BGA Pin Map .................................................................. 169
9. PCB LAYOUT ................................................................... 173
10. RF CALIBRATION ......................................................... 179
10.1 Configuration of Tachyon .................................................... 179
10.2 How to use Tachyon ............................................................... 181
11. EXPLODED VIEW & REPLACEMENT PART LIST ......... 185
11.1 EXPLODED VIEW ...................................................................... 185
11.2 Replacement Parts.................................................................. 187
11. Accessory ................................................................................... 209
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