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LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Table Of Contents
1. INTRODUCTION ...................................................................3
1.1 Purpose .....................................................................................................3
1. Regulatory Information ......................................................................3
1.3 Abbreviations..........................................................................................5
2. PERFORMANCE ....................................................................7
.1 H/W Features ...........................................................................................7
. Technical Specification ........................................................................9
3. TECHNICAL BRIEF ..............................................................14
3.1 Digital Main Processor ...................................................................... 14
3. Power Management ......................................................................... 19
3.3 FEM with integrated Power Amplifier Module
(SKY77550, U400) ............................................................................... 3
3.4 Crystal(6 MHz, X100) ...................................................................... 34
3.5 RF Subsystem (U100) ........................................................................ 36
3.6 MEMORY(H8BCS0QG0MMR, U101) ............................................ 41
3.7 BT module ............................................................................................. 43
3.8 Dual SIM Card Interface ................................................................... 45
3.9 LCD Interface ........................................................................................ 46
3.10 Battery Charger Interface ............................................................. 49
3.11 Keypad Interface ............................................................................. 50
3.1 Audio Front-End ............................................................................... 5
3.13 Camera Interface(M Fixed Focus Camera) .......................... 59
3.14 KEY BACLKLIGHT LED Interface ................................................. 61
3.15 Vibrator Interface ............................................................................. 6
4. TROUBLE SHOOTING ........................................................63
4.1 RF Component .................................................................................... 63
4. RX Trouble ............................................................................................. 64
4.3 TX Trouble .............................................................................................. 70
4.4 Power On Trouble ............................................................................... 76
4.5 Charging Trouble ................................................................................ 79
4.6 Vibrator Trouble .................................................................................. 8
4.7 LCD Trouble .......................................................................................... 85
4.8 Camera Trouble ................................................................................... 89
4.9 Speaker Trouble .................................................................................. 93
4.10 Earphone Trouble ............................................................................ 96
4.11 Receiver Trouble ............................................................................... 99
4.1 Microphone Trouble .....................................................................10
4.13 SIM Card Interface Trouble .........................................................105
4.14 KEY backlight Trouble ..................................................................108
4.15 Micro SD (uSD) Trouble ...............................................................111
4.16 Bluetooth Trouble ..........................................................................114
4.17 FM Radio Trouble ...........................................................................116
5. DOWNLOAD .....................................................................119
6. BLOCK DIAGRAM .............................................................132
7. CIRCUIT DIAGRAM ..........................................................133
8. BGA PIN MAP ..................................................................138
9. PCB LAYOUT .....................................................................144
10. ENGINEERING MODE ....................................................148
11. STAND ALONE TEST ......................................................149
11.1 Introduction .....................................................................................149
11. Setting Method ..............................................................................149
11.3 Tx Test .................................................................................................15
11.4 Rx Test .................................................................................................154
12. AUTO CALIBRATION ......................................................155
1.1 Overview ...........................................................................................155
1. Configurationof Tachyon ............................................................155
1.3 Description of Folder & File. .......................................................156
1.4 Procedure ..........................................................................................157
1.5 Tachyon Main UI .............................................................................158
1.6 AGC ......................................................................................................159
1.7 APC ......................................................................................................159
1.8 ADC ......................................................................................................159
1.9 Target Power ....................................................................................159
13. EXPLODED VIEW & REPLACEMENT PART LIST ..........160
13.1 EXPLODED VIEW .............................................................................160
13. Replacement Parts ........................................................................161
13.3 Accessory ..........................................................................................177