LG InTouch Lady User manual

Service Manual Model : LG-C320
Internal Use Only
Service Manual
LG-C320
Date: October, 2010 / Issue 1.0

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Copyright © 2010 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
1.3 Abbreviations................................................................................... 7
2. PERFORMANCE...................................................................9
2.1 Product Name.................................................................................. 9
2.2 Supporting Standard .................................................................... 9
2.3 Main Parts : GSM Solution........................................................... 9
2.4 HW Features....................................................................................10
2.5 SW Features ....................................................................................12
2.6 HW SPEC. .........................................................................................14
2.7 C320 Figures...................................................................................15
3. TECHNICAL BRIEF.............................................................16
3.1 General Description.....................................................................16
3.2 Power management....................................................................28
3.3 SUB SYSTEM....................................................................................32
3.4 General Description (RF Part) ..................................................40
3.5 GSM MODE......................................................................................41
3.6 OFF-CHIP RF COMPONENTS ....................................................44
3.7 OFF-CHIP COMPONENTS ..........................................................46
4. TROUBLE SHOOTING .......................................................50
4.1 Power ON Troubleshooting......................................................50
4.2 Charger Troubleshooting..........................................................52
4.3 USB Troubleshooting..................................................................54
4.4 USIM Detect Troubleshooting.................................................56
4.5 Camera Troubleshooting...........................................................58
4.6 Main side view LED Troubleshooting...................................60
4.7 Slide Key side view LED Troubleshooting...........................61
4.8 LCD Troubleshooting..................................................................63
4.9 Vibrator Troubleshooting..........................................................65
4.10 Receiver Path ...............................................................................67
4.11 Headset path ...............................................................................70
4.12 Speaker/Speaker Phone path...............................................73
4.13 Main microphone ......................................................................78
4.14 Headset microphone................................................................80
4.15 RF Component............................................................................82
4.16 RF Path............................................................................................83
4.17 Trouble Shooting of GSM Part ..............................................84
4.18 Checking Bluetooth Block......................................................91
4.19 Checking FM Radio Block.......................................................96
5. DOWNLOAD......................................................................99
6. BLOCK DIAGRAM........................................................... 112
7. CIRCUIT DIAGRAM ........................................................ 123
8. BGA Pin Map.................................................................. 137
9. PCB LAYOUT................................................................... 143
10. RF CALIBRATION ......................................................... 149
10.1 Usage of Tachyon for RF Calibration and Test ............. 149
11. TEST ALONE ................................................................. 152
11.1 Phone Test Mode..................................................................... 152
12. EXPLODED VIEW & REPLACEMENT PART LIST ......... 157
11.1 EXPLODED VIEW...................................................................... 157
11.2 Replacement Parts.................................................................. 159
11.3 Accessory ................................................................................... 175

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LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
1. INTRODUCTION
Introduction
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the features
of this model.
1.2 Regulatory Information
A. Security
Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example,
persons other than your company’s employees, agents, subcontractors, or person working on your
company’s behalf) can result in substantial additional charges for your telecommunications services. System
users are responsible for the security of own system.
There are may be risks of toll fraud associated with your telecommunications system. System users are
responsible for programming and configuring the equipment to prevent unauthorized use. The
manufacturer does not warrant that this product is immune from the above case but will prevent
unauthorized use of common carrier telecommunication service of facilities accessed through or connected
to it. The manufacturer will not be responsible for any charges that result from such unauthorized use.
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly causing
harm or interruption in service to the telephone network, it should disconnect telephone service until repair
can be done. A telephone company may temporarily disconnect service as long as repair is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or procedure. If these
changes could reasonably be expected to affect the use of the phones or compatibility with the net work, the
telephone company is required to give advanced written notice to the user, allowing the user to take
appropriate steps to maintain telephone service.
D. Maintenance Limitations
Maintenance limitations on the phones must be performed only by the manufacturer or its authorized agent.
The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore,
note that unauthorized alternations or repair may affect the regulatory status of the system and may void
any remaining warranty.

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LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
G
E. Notice of Radiated Emissions
This model complies with rules regarding radiation and radio frequency emission as defined by local
regulatory agencies. In accordance with these agencies, you may be required to provide information such as
the following to the end user.
F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different.
G. Interference and Attenuation
A phone may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from
unsuppressed engines or electric motors may cause problems.
H. Electrostatic Sensitive Devices
ATTENTION
Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign. Following
information is ESD handling:
• Service personnel should ground themselves by using a wrist strap when exchange system boards.
• When repairs are made to a system board, they should spread the floor with anti-static mat which is also
grounded.
• Use a suitable, grounded soldering iron.
• Keep sensitive parts in these protective packages until these are used.
• When returning system boards or parts like EEPROM to the factory, use the protective package as described.