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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 Abbreviation..........................................................................7
2. PERFORMANC ............................................................9
2.1 H/W Features .........................................................................9
2.2 Technical Specification.....................................................11
3. TECHNICAL BRIEF.....................................................16
3.1 GX300 Functional Block Diagram ................................16
3.2 Digital Main Processor (PMB8810, U102/U402) ......17
3.3 Power Management..........................................................22
3.4 FEM with integrated Power Amplifier Module
(SKY77547, U300, U302) ..................................................35
3.5 Crystal(26 MHz, X100, X401) ..........................................37
3.6 RF Subsystem of PMB8810 (U102, U402) ..................38
3.7 MEMORY................................................................................43
3.8 Bluetooth module..............................................................49
3.9 Dual SIM Card Interface. ..................................................51
3.10 LCD Interface.....................................................................52
3.11 Battery Charger Interface .............................................55
3.12 Keypad Interface..............................................................56
3.13 Audio Front-End...............................................................58
3.14 Camera Interface(1.3M Fixed Focus Camera) ........64
3.15 Flash LED Driver ...............................................................66
3.16 KEY BACLKLIGHT LED Interface..................................67
3.17 Vibrator Interface.............................................................68
4. TROUBLE SHOOTING ...............................................69
4.1 Trouble shooting test setup...........................................69
4.2 RF Component....................................................................70
4.3 RX Trouble.............................................................................72
4.4 TX Trouble.............................................................................78
4.5 Power On Trouble ..............................................................84
4.6 Charging Trouble................................................................87
4.7 Vibrator Trouble ..................................................................89
4.8 LCD Trouble..........................................................................91
4.9 Camera Trouble...................................................................95
4.10 Speaker Trouble ............................................................ 101
4.11 Earphone Trouble .........................................................104
4.12 Receiver Trouble............................................................107
4.13 Microphone Trouble................................................... 110
4.14 SIM Card Interface Trouble........................................112
4.15 KEY backlight Trouble .................................................114
4.16 Micro SD Trouble...........................................................116
4.17 Bluetooth Trouble.........................................................118
4.18 FM Radio Trouble..........................................................120
5. DOWNLOAD............................................................122
6. BLOCK DIAGRAM ...................................................135
7. CIRCUIT DIAGRAM .................................................137
8. BGA Pin Map...........................................................143
9. PCB LAYOUT ...........................................................149
10. STAND ALONE TEST .............................................153
10.1 Introduction ................................................................... 153
10.2 Setting Method .............................................................153
10.3 Tx Test................................................................................155
10.4 Rx Test.............................................................................. 156
11. AUTO CALIBRATION.............................................157
11.1 Overview..........................................................................157
11.2 Configuration of HotKimchi......................................157
11.3 Description of Basic File .............................................158
11.4 Auto Calibration setup................................................159
11.5 Procedure ........................................................................ 160
11.6 AGC....................................................................................162
11.7 APC ....................................................................................162
11.8 ADC.................................................................................... 162
11.9 Target Power...................................................................162
12. EXPLODED VIEW & REPLACEMENT
PART LIST..............................................................163
12.1 EXPLODED VIEW........................................................... 163
12.2 Replacement Parts .......................................................165
12.3 Accessory.........................................................................189
