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Cell Phone
MG180C
Service manual
Table Of Contents - LG MG180C Service Manual
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Contents
Table of Contents
Troubleshooting
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Table of Contents
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1. Introduction
..................................... 5
1.1 Purpose
................................................... 5
1.2 Regulatory Information
............................ 5
1.3 Abbreviations
.......................................... 7
2. General Performance
...................... 9
2.1 Product Name
......................................... 9
2.2 Supporting Standard
............................... 9
2.3 Main Parts: GSM Solution
........................9
2.4 H/W Features
.........................................10
2.5 S/W Features
.........................................12
3. H/W Circuit Description
................ 14
3.1 RF Transceiver General Description
..... 14
3.2 Receiver Part
........................................ 14
3.3 Transmitter Part
.................................... 17
3.4 Digital Baseband (DBB) Processor
........20
3.5 Analog Baseband (ABB) Processor
...... 25
4. TROUBLE SHOOTING
.................. 43
4.1 Main Components Placement
............... 43
4.2 FPCB Components Placement
............. 44
4.3 Baseband Components
........................ 44
4.4 Main Components (Description)
........... 45
4.5 Power On Trouble
................................. 46
4.6 Charging Trouble
.................................. 47
4.7 LCD Display Trouble
............................. 49
4.8 Receiver Trouble
................................... 51
4.9 Microphone Trouble
.............................. 55
4.10 Vibrator Trouble
.................................. 58
4.11 Keypad Backlight Trouble
................... 60
4.12 SIM Detect Trouble
............................. 62
4.13 Earphone Trouble
............................... 64
4.14 RF Rx pass Trouble Shooting
............. 68
4.15 RF Tx pass Trouble Shooting
............. 75
Table of Contents
- 3 -
5. DOWNLOAD
.................................. 83
5.1 Download Setup
.................................... 83
5.2 Download Procedure
............................ 84
6. SERVICE AND CALIBRATION
...... 91
6.1 Service S/W
...........................................91
7. CIRCUIT DIAGRAM
....................... 93
8. PCB LAYOUT
................................. 98
9. ENGINEERING MODE
10. STANDALONE TEST
10.1 Setting Method
............................... 102
11. EXPLODED VIEW &
REPLACEMENT PART LIST
..... 103
11.1 EXPLODED VIEW
............................ 103
11.2 Replacement Parts
<Mechanic component
>.................... 105
<Main component
> ........................... 107
11.3 Accessory
......................................... 117
....................
101
....................
102
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Table of Contents
Troubleshooting
TROUBLE SHOOTING
44
RF Rx pass Trouble Shooting
69
RF Tx pass Trouble Shooting
76
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