LG GB220 - Default Chapter; Table of Contents

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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. SYSTEM SPECIFICATION................................. 9
2.1 H/W Features ..............................................................9
2.2 Technical Specifi cation ...............................................11
3. TECHNICAL BRIEF .........................................16
3.1 Digital Main Processor ...............................................16
3.2 Power Management ..................................................21
3.3 FEM with integrated Power Amplifi er Module
(SKY77531, U400) .................................................... 35
3.4 Crystal(26 MHz, X100) ...............................................37
3.5 RF Subsystem of PMB8810 (U102) ............................38
3.6 MEMORY(PF38F5060M0Y0BE, U202 ) .......................43
3.7 BT module ................................................................45
3.8 SIM Card Interface .....................................................47
3.9 LCD Interface ............................................................48
3.10 Battery Charger Interface .........................................51
3.11 Keypad Interface .....................................................52
3.12 Audio Front-End ......................................................54
3.13 Camera Interface(1.3M Fixed Focus Camera) ............60
3.14 KEY BACLKLIGHT LED Interface ................................62
3.15 Vibrator Interface .....................................................63
3.16 Flip SW Interface .....................................................64
4. TROUBLE SHOOTING .....................................65
4.1 RF Component ..........................................................65
4.2 RX Trouble ................................................................66
4.3 TX Trouble .................................................................70
4.4 Power On Trouble ......................................................74
4.5 Charging Trouble .......................................................77
4.6 Vibrator Trouble .........................................................79
4.7 LCD Trouble ..............................................................81
4.8 Camera Trouble .........................................................86
4.9 Speaker Trouble ........................................................89
4.10 Earphone Trouble .....................................................91
4.11 Receiver Trouble ......................................................93
4.12 Microphone Trouble .................................................95
4.13 SIM Card Interface Trouble .......................................97
4.14 KEY backlight Trouble ..............................................99
4.15 Micro SD Trouble ...................................................101
4.16 Bluetooth Trouble ...................................................103
4.17 FM Radio Trouble ...................................................105
4.18 folder on/off Trouble...............................................107
5. DOWNLOAD .................................................109
5.1 S/W Download ........................................................109
5.2 Download program user guide ..................................110
5.3 Multi-Download Program Setting (Model-Base)..........111
6. Block Diagram ........................................... 113
7. CIRCUIT DIAGRAM ...................................... 115
8. BGA Pin Map .............................................. 123
9. PCB LAYOUT ...............................................127
10. ENGINEERING MODE ................................. 133
11. STAND ALONE TEST..................................135
11.1 Introduction ...........................................................135
11.2 Setting Method ......................................................135
11.3 Tx Test ..................................................................137
11.4 Rx Test ..................................................................138
12. AUTO CALIBRATION ..................................140
12.1 Overview ...............................................................140
12.2 Confi guration of HotKimchi .....................................140
12.3 Description of Basic File. ........................................141
12.4 Procedure .............................................................142
12.5 AGC ......................................................................145
12.6 APC ......................................................................145
12.7 ADC ......................................................................145
12.8 Target Power .........................................................145
13. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................147
13.1 EXPLODED VIEW ...................................................147
13.2 Replacement Parts ................................................149
13.3 Accessory ............................................................. 164