LG MG150 User manual

Service Manual Model : MG150
Date: August, 2005 / Issue 1.0
Service Manual
MG150

The information in this manual is subject to change without notice and should not be construed as a
commitment by LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make changes to
equipment design as advances in engineering and manufacturing methods warrant.
This manual provides the information necessary to install, program, operate and maintain the MG150.
REVISED HISTORY
DATE ISSUE CONTENTS OF CHANGES S/W VERSION
01/JUL/2005 ISSUE 1.0 Initial Release

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1. Introduction ..................................... 5
1.1 Purpose................................................... 5
1.2 Regulatory Information............................ 5
2. General Performance...................... 9
2.1 Product Name ......................................... 9
2.2 Supporting Standard............................... 9
2.3 Main Parts............................................... 9
2.4 H/W Features........................................ 10
2.5 S/W Features ........................................ 12
3. H/W Circuit Description................ 14
3.1. General Description ............................. 14
3.2. Receiver Part ....................................... 14
3.3. Transmitter Part ................................... 17
3.4. Digital Baseband (DBB) Processor...... 21
3.5. Analog Baseband (ABB) Processor..... 26
4. TROUBLE SHOOTING .................. 45
4.1. Main Components Placement.............. 45
4.2. FPCB Components Placement ............ 46
4.3. Baseband Components ....................... 46
4.4 Main Components (Description) ........... 47
4.5. Power On Trouble................................ 48
4.6. Charging Trouble ................................. 49
4.7. LCD Display Trouble............................ 51
4.8. Receiver Trouble.................................. 53
4.9. Microphone Trouble ............................. 57
4.10. Vibrator Trouble ................................. 59
4.11. Keypad Backlight Trouble.................. 60
4.12 FOLDER Open/Close Trouble ............ 62
4.13. SIM Detect Trouble ............................ 64
4.14. Earphone Trouble .............................. 66
5. DOWNLOAD .................................. 85
5.1. Download Setup................................... 85
5.2. Download Procedure ........................... 86
6. SERVICE AND CALIBRATION...... 93
6.1. Service S/W ......................................... 93
6.2. Calibration............................................ 96
7. BLOCK DIAGRAM ....................... 100
8. CIRCUIT DIAGRAM ..................... 103
9. PCB LAYOUT ............................... 107
10. ENGINEERING MODE ............... 109
11. STANDALONE TEST ................. 110
11.1 Setting Method.................................. 110
Table of Contents

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12. EXPLODED VIEW &
REPLACEMENT PART LIST...... 111
12.1 EXPLODED VIEW ............................ 111
12.2 Replacement Parts ........................... 113
<Mechanic component>.................... 113
<Main component> ........................... 116
12.3 Accessory ......................................... 126