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Copyright © 2009 LG Electronics. Inc. All right reserved.
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
1.3. ABBREVIATION ...........................................................7
2. PERFORMANCE............................................... 9
2.1 Supporting Standard....................................................9
2.2 Main Parts : Solution..................................................10
2.3 H/W features.............................................................10
2.4 HW Spec. ................................................................12
3. BB CIRCUIT TECHNICAL BRIEF..................... 17
3.1 Functional Block Diagram ..........................................17
3.2 Baseband Processor Introduction ..............................18
3.3 Power management IC...............................................31
3.4 Power ON/OFF ..........................................................38
3.5 SIM Interface.............................................................39
3.6 T - Flash connector....................................................40
3.7 Memory ...................................................................41
3.8 LCD Display ..............................................................42
3.9 LCD back-light illumination ........................................43
3.10 Battery voltage monitor............................................44
3.11 Audio......................................................................45
3.12 WLAN/Bluetooth/FM (LBEH19UNBC).........................49
3.13 18PIN Interface connector........................................51
4. RF Circuit Technical Brief ............................52
4.1 General Description ...................................................52
4.2 GSM Part..................................................................55
4.3 WCDMA Part.............................................................59
4.4 GSM Power Amplifier Module.....................................61
4.5 WCDMA Band1/8 Power Amplifier Module ..................62
4.6 WCDMA Band1/8 Low Noise Amplifier ........................64
4.7 WCDMA Band1/2 Duplexer ........................................65
4.8 WCDMA Band5/8 Duplexer ........................................66
5. Trouble shooting ..........................................67
5.1 Trouble shooting test setup ........................................67
5.2 Power on trouble .......................................................68
5.3 Charging Trouble .......................................................73
5.4 USB Trouble ..............................................................76
5.5 SIM Detect Trouble ....................................................79
5.7 Micro SD Trouble .......................................................82
5.8 Audio Trouble ............................................................84
5.9 Microphone Trouble ...................................................88
5.10 Camera Trouble.......................................................92
5.11 Main LCD Trouble ....................................................96
5.12 WiFi /Bluetooth Trouble ............................................98
5.13 A-GPS Trouble.......................................................104
5.14 SIDE FPCB ............................................................108
5.15 Speaker Module ....................................................110
5.16 Ambient Sensor.....................................................112
5.17 Touch Sensor ........................................................113
6. Download & S/W upgrade .........................115
7. BLOCK DIAGRAM........................................126
8. CIRCUIT DIAGRAM...................................... 127
9. BGA Pin Map ..............................................139
10. PCB LAYOUT .............................................143
11. RF Calibration .......................................... 151
11.1. Test Equipment Setup ...........................................151
11.2. Calibration Step....................................................151
12. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................157
12.1 EXPLODED VIEW ...................................................157
12.2 Replacement Parts ................................................159
12.3 Accessory .............................................................192
