User Manuals: LG MG235 Cell Phone Startup

Manuals and User Guides for LG MG235 Cell Phone Startup. We have 1 LG MG235 Cell Phone Startup manual available for free PDF download: Service Manual

LG MG235 Service Manual

LG MG235 Service Manual (119 pages)

1.51” display

Brand: LG | Category: Cell Phone | Size: 7 MB

Table of Contents

Table of Contents
4
1 Introduction

6
- Purpose
  6
- Regulatory Information
  6
2 System Specification

8
3 Technical Brief

9
- MG230/MG235 Block Diagram
  9
- RF Part Introduction
  10
  - Receiver Part
    10
  - Transmitter Part
    12
  - The Crystal Reference System
    14
  - Power Management
    15
- Baseband Introduction
  16
  - Baseband Processor
    16
  - Interconnection with External Devices
    17
  - Battery Charging Block
    20
  - Display and Interface
    21
  - Keypad Switches and Scanning
    23
  - Microphone
    24
  - Soft-MIDI and Main Speaker
    24
  - Headset Interface
    26
  - Key Back-Light Illumination
    27
  - LCD Back-Light Illumination
    28
  - Vibrator
    29
4 Trouble Shooting

30
- RF Components
  30
- RX Trouble
  31
- TX Trouble
  37
- Power on Trouble
  45
- Charging Trouble
  47
- LCD Trouble
  49
- Receiver Trouble
  52
- Speaker Trouble
  54
- MIC Trouble
  56
- Earphone Trouble
  58
- KEYPAD Backlight LEDS Trouble
  62
- SIM Trouble
  63
- Vibration Trouble
  65
5 Download

67
6 Circuit Diagram

70
7 Pcb Layout

79
8 Engineering Mode

84
- BB Test [MENU 1]
  85
- RF Test [MENU 2]
  87
- MF Mode [MENU 3]
  87
  - Sar Test
    87
  - All Auto Test
    87
  - Key Pad
    87
- Trace Option [MENU 4]
  88
- Call Timer [MENU 5]
  88
- Fact. Reset [MENU 6]
  88
- S/W Version
  88
- Camera Test
  88
9 Stand Alone Test

89
- Introduction
  89
- Setting Method
  89
10 Calibration

92
- Calibration with Hotkimchi
  92
- Equipment Setup
  92
12 Exploded View & Replacement Part List

100
- Exploded View
  100
- Replacement Parts
  102
  - Mechanic Component
    102
  - Main Component
    104
- Accessory
  117

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