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LGE Internal Use Only Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Table Of Contents
1. INTRODUCTION...................................................................3
1.1 Purpose .....................................................................................................3
1.2 Regulatory Information ......................................................................3
1.3 Abbreviations..........................................................................................5
2. PERFORMANCE....................................................................7
2.1 H/W Features...........................................................................................7
2.2 Technical Specification........................................................................9
3. TECHNICAL BRIEF..............................................................13
3.1 Digital Main Processor...................................................................... 13
3.2 Power Management ......................................................................... 18
3.3 FEM with integrated Power Amplifier Module
(SKY77550, U500)............................................................................... 31
3.4 Crystal(26 MHz, X100) ...................................................................... 33
3.5 RF Subsystem (U101)........................................................................ 35
3.6 MEMORY(H8BCS0QG0MMR, U100)............................................ 40
3.7 BT module............................................................................................. 42
3.8 SIM Card Interface.............................................................................. 44
3.9 LCD Interface........................................................................................ 45
3.10 Battery Charger Interface............................................................. 48
3.11 Audio Interface................................................................................. 49
3.12 Camera Interface(1.3M Fixed Focus Camera)....................... 55
4. TROUBLE SHOOTING ........................................................57
4.1 RF Component .................................................................................... 57
4.2 RX Trouble ............................................................................................. 58
4.3 TX Trouble.............................................................................................. 64
4.4 Power On Trouble............................................................................... 70
4.5 Charging Trouble................................................................................ 73
4.6 Vibrator Trouble .................................................................................. 76
4.7 LCD Trouble .......................................................................................... 79
4.8 Camera Trouble................................................................................... 83
4.9 Speaker / Receiver Trouble............................................................. 87
4.10 Earphone Trouble ............................................................................ 90
4.11 Microphone Trouble....................................................................... 93
4.12 SIM Card Interface Trouble........................................................... 96
4.13 Micro SD (uSD) Trouble ................................................................. 99
4.14 Bluetooth Trouble..........................................................................102
4.15 FM Radio Trouble...........................................................................105
4.16 Wireless FM Radio Trouble .........................................................107
5. DOWNLOAD.....................................................................110
6. BLOCK DIAGRAM.............................................................123
7. CIRCUIT DIAGRAM ..........................................................124
8. BGA PIN MAP ..................................................................129
9. PCB LAYOUT.....................................................................131
10.ENGINEERING MODE .....................................................133
11. STAND ALONE TEST ......................................................134
11.1 Introduction.....................................................................................134
11.2 Setting Method ..............................................................................134
11.3 Tx Test .................................................................................................137
11.4 Rx Test.................................................................................................139
12. AUTO CALIBRATION......................................................141
12.1 Overview...........................................................................................141
12.2 Directory structure of Tachyon.................................................141
12.3 Description of Folder & File........................................................142
12.4 Procedure..........................................................................................143
12.5 Tachyon Main UI.............................................................................144
12.6 AGC......................................................................................................145
12.7 APC ......................................................................................................145
12.8 ADC......................................................................................................145
12.9 Target Power....................................................................................145
13. EXPLODED VIEW & REPLACEMENT PART LIST ..........146
13.1 EXPLODED VIEW.............................................................................146
13.2 Replacement Parts ........................................................................147
13.3 Accessory ..........................................................................................163
