Table of Contents
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1. INTRODUCTION .............................. 5
1.1 Purpose................................................... 5
1.2 Regulatory Information............................ 5
2. PERFORMANCE...............................7
2.1 System Overview .....................................7
2.2 Usable environment .................................8
2.3 Radio Performance ..................................8
2.4 Current Consumption.............................14
2.5 Antenna BAR .........................................14
2.6 Battery BAR ...........................................15
2.7 Sound Pressure Level............................16
2.8 Charging ................................................16
3. TECHNICAL BRIEF ........................17
3.1 General Description ...............................17
3.2 GSM Mode.............................................19
3.3 UMTS Mode...........................................23
3.4 LO Phase-locked Loop ..........................27
3.5 Off-chip RF Components .......................29
3.6 Digital Baseband(DBB/MSM6280).........38
3.7 Block Diagram(MSM6280).....................40
3.8. Subsystem(MSM6280) .........................41
3.9. Power Block ..........................................48
3.10. External memory interface ..................53
3.11. H/W Sub System.................................54
3.12 Main Features ......................................71
4. TROUBLE SHOOTING ...................77
4.1 RF Component.......................................77
4.2. Checking VCXO Block ..........................79
4.3. Checking Ant. SW Module Block ..........81
4.4. Checking UMTS Block ..........................83
4.5. Checking GSM Block ............................92
4.6. Power ON Troubleshooting...................95
4.7. Charger Troubleshooting ......................98
4.8. USB Troubleshooting..........................101
4.9 SIM Detect Troubleshooting ................103
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Table Of Contents
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4.13 Main LCD Troubleshooting ................109
4.14 Receiver Path ....................................110
4.15 Headset path......................................112
4.16 Speaker phone path...........................114
4.17 Main microphone ...............................116
4.18 Headset microphone..........................118
4.19 Vibrator ..............................................120
5. DOWNLOAD .................................121
5.1 Introduction ..........................................121
5.2 Downloading Procedure.......................121
5.3 Troubleshooting Download Errors .......135
5.4 Caution.................................................141
6. BLOCK DIAGRAM ........................142
6.1 GSM & UMTS RF Block.......................142
6.2 Interface Diagram ................................144
7. Circuit Diagram ............................149
8. BGM Pin Map................................159
9. PCB LAYOUT ................................161
Program (Hot Kimchi)................169
10.1 Configuration of HOT KIMCHI ...........169
10.2 How to use HOT KIMCHI...................170
REPLACEMENT PART LIST ..... 175
11.1 EXPLODED VIEW ............................ 175
<Mechanic component>.................... 177
<Main component> ........................... 180
11.3 Accessory ......................................... 195
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Table of Contents
Troubleshooting
