LG MG280 Manuals

Manuals and User Guides for LG MG280. We have 2 LG MG280 manuals available for free PDF download: Service Manual

LG MG280 Service Manual

LG MG280 Service Manual (138 pages)

Brand: LG | Category: Cell Phone | Size: 3.83 MB

Table of Contents

Table of Contents
2
1 Introduction

4
- Purpose
  4
- Regulatory Information
  4
- Abbreviations
  6
2 Performance

8
- H/W Features
  8
- Technical Specification
  9
3 Technical Brief

14
- Power Amplifier (SKY77318, U600)
  14
- Transceiver (AD6549, U601)
  16
- FEM for Triband(FL600)
  18
- 26 Mhz Clock (VCTCXO, X500)
  19
- Baseband Processor (AD6720 , U101)
  25
- Display and Interface
  27
- Camera IC(AIT701G , U401)
  29
- Keypad Switches and Scanning
  31
- Microphone
  33
- Main Speaker
  33
- Headset Interface
  35
- Key Back-Light Illumination
  36
- LCD Back-Light Illumination
  37
- Vibrator
  38
- Bluetooth
  39
4 Trouble Shooting

40
- RF Component
  40
- RX Trouble
  41
- TX Trouble
  46
- Power on Trouble
  52
- Charging Trouble
  54
- Vibrator Trouble
  56
- LCD Trouble
  58
- Camera Trouble
  61
- Speaker Trouble
  64
- SIM Card Interface Trouble
  66
- Earphone Trouble
  68
- KEY Backlight Trouble
  70
- Key Backlight
  71
- Receiver Trouble
  72
- Microphone Trouble
  74
- RTC Trouble
  76
- Slide On/Off Trouble
  78
5 Download

80
6 Block Diagram

86
- Circuit Diagram
  86
7 Circuit Diagram

88
8 Pcb Layout

98
9 Engineering Mode

104
- BB Test [MENU 1]
  105
- RF Test [MENU 2]
  107
- MF Mode [MENU 3]
  107
  - Sar Test
    107
  - All Auto Test
    107
  - Key Pad
    107
- Trace Option [MENU 4]
  108
- Call Timer [MENU 5]
  108
- Fact. Reset [MENU 6]
  108
- S/W Version
  108
- Camera Test
  108
10 Stand Alone Test

109
- Introduction
  109
- Setting Method
  109
- Means of Test
  110
11 Auto Calibration

112
- Overview
  112
- Equipment List
  112
- Test Jig Operation
  113
- Procedure
  114
- Agc
  117
- Apc
  117
- Adc
  117
12 Exploded View & Replacement Part List

118
- Exploded View
  118
- Replacement Parts
  120
  - Mechanic Component
    120
  - Main Component
    122
- Accessory
  136

LG MG280 Service Manual

LG MG280 Service Manual (138 pages)

Service Manual

Brand: LG | Category: Cell Phone | Size: 3.86 MB

Table of Contents

Table of Contents
2
1 Introduction

4
- Purpose
  4
- Regulatory Information
  4
- Abbreviations
  6
2 Performance

8
- H/W Features
  8
- Technical Specification
  9
3 Technical Brief

14
- Power Amplifier (SKY77318, U600)
  14
- Transceiver (AD6549, U601)
  16
- FEM for Triband(FL600)
  18
- 26 Mhz Clock (VCTCXO, X600)
  19
- Baseband Processor (AD6720 , U101)
  25
- Display and Interface
  27
- Camera IC(AIT701G , U401)
  29
- Keypad Switches and Scanning
  31
- Microphone
  33
- Main Speaker
  33
- Headset Interface
  35
- Key Back-Light Illumination
  36
- LCD Back-Light Illumination
  37
- Vibrator
  38
- Bluetooth
  39
4 Trouble Shooting

40
- RF Component
  40
- RX Trouble
  41
- TX Trouble
  46
- Power on Trouble
  52
- Charging Trouble
  54
- Vibrator Trouble
  56
- LCD Trouble
  58
- Camera Trouble
  61
- Speaker Trouble
  64
- SIM Card Interface Trouble
  66
- Earphone Trouble
  68
- KEY Backlight Trouble
  70
- Receiver Trouble
  72
- Microphone Trouble
  74
- RTC Trouble
  76
- Slide On/Off Trouble
  78
5 Download

80
6 Block Diagram

86
7 Circuit Diagram

88
8 Pcb Layout

98
9 Engineering Mode

104
- BB Test [MENU 1]
  105
- RF Test [MENU 2]
  107
- MF Mode [MENU 3]
  107
  - Sar Test
    107
  - All Auto Test
    107
  - Key Pad
    107
- Trace Option [MENU 4]
  108
- Call Timer [MENU 5]
  108
- Fact. Reset [MENU 6]
  108
- S/W Version
  108
10 Stand Alone Test

109
- Introduction
  109
- Setting Method
  109
- Means of Test
  110
11 Auto Calibration

112
- Overview
  112
- Equipment List
  112
- Test Jig Operation
  113
- Procedure
  114
- Agc
  117
- Apc
  117
- Adc
  117
12 Exploded View & Replacement Part List

118
- Exploded View
  118
- Replacement Parts
  120
- Main Component
  122
- Accessory
  136

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