Table Of Contents - LG KU800 Service Manual

1. INTRODUCTION .............................. 5
1.1 Purpose................................................... 5
1.2 Regulatory Information............................ 5
2. PERFORMANCE...............................7
2.1 System Overview .....................................7
2.2 Usable environment .................................8
2.3 Radio Performance ..................................8
2.4 Current Consumption.............................14
2.5 RSSI BAR ..............................................14
2.6 Battery BAR ...........................................14
2.7 Sound Pressure Level............................15
2.8 Charging ................................................16
3. TECHNICAL BRIEF ........................17
3.1 General Description ...............................17
3.2 GSM Mode.............................................20
3.3 WCDMA Mode .......................................23
3.4 LO Phase-locked Loop ..........................25
3.5 Off-chip RF Components .......................28
3.6 Digital Baseband(DBB/MSM6275).........35
3.7 Hardware Architecture ...........................36
3.8 Subsystem(MSM6275) ..........................38
3.9 Power Block ...........................................41
3.10 External memory interface ...................46
3.11 H/W Sub System..................................47
4. TROUBLE SHOOTING ...................75
4.1 RF Component.......................................75
4.2 SIGNAL PATH .......................................76
4.3 Checking VTCXO Block.........................78
4.4 Checking Ant. SW Module Block ...........81
4.5 Checking WCDMA Block .......................83
4.6 Bluetooth RF Block ................................86
4.7 Checking GSM Block .............................88
4.8 Power ON Troubleshooting....................96
4.9 Charger Troubleshooting .....................101
4.10 USB Troubleshooting.........................104

Table Of Contents

- 3 -
4.11 SIM Detect Troubleshooting ..............106
4.12 Key Sense Troubleshooting...............107
4.13 Camera Troubleshooting
(2M Camera)......................................108
4.14 Keypad Backlight Troubleshooting ....110
4.15 Folder ON/OFF Troubleshooting .......111
4.16 Main LCD Troubleshooting ................112
4.17 Main LCD Troubleshooting ................113
4.18 Audio Trouble Shooting .....................115
4.19 Audio Trouble Shooting .....................116
5. DOWNLOAD .................................126
5.1 Introduction ..........................................126
5.2 Downloading Procedure.......................126
5.3 Troubleshooting Download Errors .......139
5.4 Caution.................................................145
6. BLOCK DIAGRAM ........................146
6.1 GSM & WCDMA RF Block...................146
6.2 Interface Diagram ................................148
7. Circuit Diagram ............................151
8. pcb layout .....................................162
9. Calibration & RF Auto
Test Program ................................173
9.1 Configuration of HOT KIMCHI .............173
9.2 Example for using HOT KIMCHI ..........177
10. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 179
10.1 EXPLODED VIEW ............................ 179
10.2 Replacement Parts
<Mechanic component>.................... 181
<Main component> ........................... 185
10.3 Accessory ......................................... 203