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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION...............................................5
1.1 Purpose......................................................................5
1.2 Regulatory Information.................................................5
2. PERFORMANCE............................................... 7
2.1 Product Name .............................................................7
2.2 Supporting Standard....................................................7
2.3 Main Parts : GSM Solution ...........................................7
2.4 HW Features ..............................................................8
2.5 SW Features .............................................................10
2.6 HW SPEC..................................................................12
3. TECHNICAL BRIEF......................................... 16
3.1 GENERAL DESCRIPTION.............................................16
3.2 GSM MODE...............................................................17
3.3 UMTS MODE.............................................................21
3.4 OFF-CHIP RF COMPONENTS......................................26
3.5 OFF-CHIP COMPONENTS...........................................29
3.6 General Description ...................................................33
3.7 Power management ..................................................45
3.8 SUB SYSTEM ............................................................50
4. TROUBLE SHOOTING..................................... 59
4.1 RF Component ..........................................................59
4.2 RF Path ....................................................................61
4.3 Trouble Shooting of GSM Part (GSM900/1800/1900) ..63
4.4 Trouble Shooting of WCDMA part................................71
4.5 Checking Bluetooth Block ..........................................77
4.6 Checking FM Radio Block ..........................................82
4.7 Power ON Troubleshooting .........................................85
4.8 Charger Troubleshooting ............................................88
4.9 USB Troubleshooting..................................................89
4.10 USIM Detect Troubleshooting....................................90
4.11 Camera Troubleshooting ..........................................93
4.12 Main side view LED Troubleshooting .........................95
4.13 Slide Key side view LED Troubleshooting ...................97
4.14 LCD Troubleshooting................................................99
4.15 Vibrator Troubleshooting.........................................101
4.16 Receiver Path........................................................102
4.17 Headset path.........................................................105
4.18 Speaker phone path ..............................................107
4.19 Main microphone ..................................................110
4.20 Headset microphone..............................................112
5. Download ................................................... 114
5.1 Introduction.............................................................114
5.2 Downloading Procedure...........................................115
5.3 Troubleshooting Download Errors..............................131
5.4 Caution...................................................................136
6. Block Diagram ........................................... 137
7. CIRCUIT DIAGRAM...................................... 147
8. BGA Pin Map ..............................................161
9. PCB LAYOUT ...............................................167
10. Calibration................................................ 177
11. Test Mode.................................................180
12. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................189
12.1 EXPLODED VIEW ...................................................189
12.2 Replacement Parts ................................................191
12.3 Accessory .............................................................215
