Table of Contents
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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 ........................15
Dual-Band GSM/GPRS (U501)..............15
3.2 Transceiver (AD6548, U502) .................17
3.3 26 MHz Clock (Crystal, X500)................19
3.5 Display and Interface .............................27
3.6 Camera Interface(AIT701G, U402)........29
3.7 Keypad Switches and Scanning ............31
3.8 Microphone ............................................32
3.9 Main Speaker.........................................33
3.10 Headset Interface.................................34
3.11 Key Back-light Illumination...................35
3.12 LCD Back-light Illumination..................36
3.13 VIBRATOR...........................................37
4. TROUBLE SHOOTING ...................38
4.1 RF Component.......................................38
4.2 RX Trouble.............................................39
4.3 TX Trouble .............................................43
4.4 Power On Trouble..................................46
4.5 Charging Trouble ...................................48
4.6 Vibrator Trouble .....................................50
4.7 LCD Trouble...........................................52
4.8 Camera Trouble .....................................55
4.9 Speaker Trouble ....................................58
4.10 SIM Card Interface Trouble..................60
4.11 Earphone (Headset mic) Trouble.........62
4.12 KEY backlight Trouble .........................64
4.13 Receiver Trouble..................................66
4.14 Microphone Trouble .............................68
4.15 RTC Trouble ........................................70
4.16 Folder on/off Trouble............................71
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Table Of Contents
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5. DOWNLOAD.......................................72
5.1 Download ...............................................72
6. BLOCK DIAGRAM ..........................78
7. CIRCUIT DIAGRAM ........................79
8. BGA IC Pin Check ..........................85
9. PCB LAYOUT ..................................89
10. ENGINEERING MODE ..................95
10.1 BB Test [MENU 1]................................96
10.2 RF Test [MENU 2]................................97
10.3 MF mode [MENU 3] .............................98
10.4 Trace option [MENU 4] ........................99
10.5 Call timer [MENU 5] .............................99
10.6 Fact. Reset [MENU 6] ..........................99
10.7 S/W version..........................................99
11. STAND ALONE TEST .................100
11.1 Introduction ........................................100
11.2 Setting Method...................................100
11.3 Means of Test ....................................101
12. AUTO CALIBRATION .................103
12.1 Overview ............................................103
12.2 Equipment List ...................................103
12.3 Test Jig Operation..............................104
12.4 Procedure ..........................................105
12.5 AGC ...................................................107
12.6 APC....................................................107
12.7 ADC ...................................................107
REPLACEMENT PART LIST ..... 109
13.1 Exploded View .................................. 109
13.2 Replacement Parts ............................111
13.3 Accessory ......................................... 124
LGE Internal Use Only
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