LG L602i, Service Manual

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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 WCDMA Mode .......................................23
3.4 LO Phase-locked Loop ..........................26
3.5 Off-chip RF Components .......................28
3.6 Digital BaseBand(DBB/MSM6250A)......34
3.7 Hardware Architecture ...........................36
3.8 Subsystem(MSM6250A) ........................37
3.9 External memory interface .....................40
3.10 H/W Sub System..................................41
3.11 Main Features ......................................65
4. TROUBLE SHOOTING ...................70
4.1. RF Component......................................70
4.2. SIGNAL PATH ......................................72
4.3. Checking VCXO Block ..........................74
4.4. Checking Ant. SW Module Block ..........77
4.5. Checking WCDMA Block ......................79
4.6. Checking GSM Block ............................87
4.7 Power ON Trouble .................................94
4.8 USB Trouble ..........................................96
4.9 SIM Detect Trouble ................................97
4.10 Key Sense Trouble ..............................98
4.11 VGA Camera Trouble ..........................99
4.12 1.3M Camera Trouble ........................100
4.13 Main LCD Trouble..............................101
4.14 Folder ON/OFF Trouble .....................103
4.15 Camera Direction Change Trouble ....104
4.16 Audio Trouble Shooting .....................105
4.17 Charger Trouble Shooting..................117
5. DOWNLOAD..................................119
5.1 Introduction ..........................................119
5.2 Downloading Procedure.......................119
5.3 Troubleshooting Download Errors .......128
5.4 Caution.................................................133
6. BLOCK DIAGRAM ........................134
6.1 GSM & WCDMA RF Block...................134
6.2 Interface Diagram ................................136
7. Circuit Diagram ............................141
8. pcb layout .....................................150
9. Calibration Program ....................157
9.1 Configuration of HOT KIMCHI .............157
9.2 How to use HOT KIMCHI.....................160
10. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 163
10.1 EXPLODED VIEW ............................ 163
10.2 Replacement Parts
<Mechanic component>.................... 165
<Main component> ........................... 170
10.3 Accessory ......................................... 191
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