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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.................................15
2.5 RSSI BAR ..................................................15
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 generation and distribution circuits ......26
3.5 Off-chip RF Components ...........................26
3.6 Digital Baseband (MSM6280)....................38
3.7 Subsystem(MSM6280) ..............................40
3.8 Power Block...............................................48
3.9. External memory interface........................53
3.10 H/W Sub System .....................................55
3.11. MAIN Features........................................74
4. TROUBLE SHOOTING.......................79
4.1 RF Component ..........................................79
4.2 Component Description .............................80
4.3 WCDMA RF Signal Path............................81
4.4 GSM RF Signal Path .................................82
4.5 Checking VCTCXO Block ..........................83
4.6 Checking Front-End Module Block ............85
4.7 Checking WCDMA Block ...........................87
4.8 Checking GSM Block.................................92
4.9 Checking Bluetooth Block..........................98
4.10 Power ON Troubleshooting ...................101
4.11 Charger Troubleshooting .......................103
4.12 USB Troubleshooting.............................106
4.13 USIM Detect Troubleshooting................108
4.14 Camera Troubleshooting .......................110
4.15 Keypad Backlight Troubleshooting ........113
4.16 Folder ON/OFF Troubleshooting ...........115
4.17 Main LCD Troubleshooting ....................116
4.18 Receiver Path ........................................117
4.19 Headset path .........................................119
4.20 Speaker phone path ..............................121
4.21 Main microphone ...................................123
4.22 Headset microphone..............................125
4.23 Vibrator ..................................................127
5. DOWNLOAD.....................................128
5.1 Introduction ..............................................128
5.2 Downloading Procedure ..........................128
5.3 Troubleshooting download errors ............141
5.4 Caution ....................................................149
6. BLOCK DIAGRAM ...........................150
6.1 GSM & UMTS RF Block ..........................150
6.2 Interface Diagram ....................................152
7. CIRCUIT DIAGRAM..........................159
8. BGA IC PIN MAP..............................169
9. PCB LAYOUT ...................................171
10. Calibration & RF Auto
Test Program (Hot Kimchi) ...........177
10.1 Configuration of HOT KIMCHI ...............177
10.2 How to use HOT KIMCHI.......................179
11. EXPLODED VIEW & REPLACEMENT
PART LIST ..................................... 181
11.1 EXPLODED VIEW ................................ 181
11.2 Replacement Parts
<Mechanic component> ....................... 183
<Main component> ............................... 186
11.3 Accessory ............................................. 203
Table Of Contents
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
