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Copyright © 2010 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 Abbreviations ................................................................................... 7
2. PERFORMANCE ..................................................9
2.1 H/W Features .................................................................................... 9
2.2 Technical Specification ...............................................................10
3. TECHNICAL BRIEF ............................................17
3.1 GX500 Functional Block diagram...........................................17
3.2 Dual Baseband Processor (BBP) Introduction ...................18
3.3 Power management IC ..............................................................38
3.4 Power ON/OFF ...............................................................................46
3.5 Dual SIM & u-SD Interface .........................................................48
3.6 Memory ............................................................................................50
3.7 LCD Display .....................................................................................53
3.8 Keypad Switching & Scanning ................................................54
3.9 LCD back-light illumination ......................................................55
3.10 JTAG & ETM interface connector .........................................56
3.11 Audio ...............................................................................................57
3.12 Charging circuit ..........................................................................59
3.13 WI-FI & BLUETOOTH & FMradio ............................................60
3.14 5pin Micro USB Interface connector ..................................63
3.15 Triaxial, digital acceleration sensor .....................................64
3.16 General Description ..................................................................66
3.17 Receiver part ................................................................................68
3.18 Transmitter part ..........................................................................69
3.19 RF synthesizer ..............................................................................70
3.20 DCXO ...............................................................................................70
3.21 Front End Module control ......................................................71
3.22 Power Amplifier Module .........................................................72
3.23 PAM Schematic ...........................................................................73
4. TROUBLE SHOOTING ......................................74
4.1 Trouble shooting test setup .....................................................74
4.2 Power on Trouble ..........................................................................75
4.3 Charging trouble ..........................................................................78
4.4 LCD display trouble .....................................................................80
4.5 Camera Trouble .............................................................................82
4.6 Receiver & Speaker trouble ......................................................84
4.7 Microphone trouble ....................................................................86
4.8 Vibrator trouble .............................................................................87
4.9 SIM & uSD trouble ........................................................................89
4.10 Touch trouble...............................................................................92
4.11 LCD LED trouble .........................................................................93
4.12 Trouble shooting of Receiver part .......................................94
4.13 Trouble shooting of Transmitter part .............................. 100
4.14 Trouble shooting of WI-FI/BT/FM part ............................ 109
5. DOWNLOAD & S/W UPGRADE......................112
6. BLOCK DIAGRAM ...........................................120
7. CIRCUIT DIAGRAM ........................................121
8. BGA Pin Map ..................................................129
9. PCB LAYOUT ...................................................139
10. RF CALIBRATION .........................................147
10.1 Test Equipment Setup ........................................................... 147
10.2 Calibration Step ....................................................................... 147
11. STAND ALONE TEST ....................................152
11.1 SIM1 TEST ................................................................................... 152
11.2 SIM2 TEST ................................................................................... 159
12. ENGINEERING MODE ..................................161
13. EXPLODED VIEW & REPLACEMENT
PART LIST ....................................................163
13.1 EXPLODED VIEW ...................................................................... 163
13.2 Replacement Parts..................................................................165
13.3 Accessory ................................................................................... 189
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