LG KG291 Manuals

Manuals and User Guides for LG KG291. We have 1 LG KG291 manual available for free PDF download: Service Manual

LG KG291 Service Manual

LG KG291 Service Manual (152 pages)

Brand: LG | Category: Cell Phone | Size: 5.12 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, U500)
  14
- Transceiver (AD6548, U501)
  16
- FEM for Triband(FL500)
  18
- 26 Mhz Clock (DCXO, X500)
  19
- Baseband Processor (AD6721 , U103)
  25
- Display and Interface
  27
- Camera IC(AIT813G , U400)
  29
- Keypad Switches and Scanning
  31
- Microphone
  32
- Main Speaker
  32
- Headset Interface
  34
- Key Back-Light Illumination
  35
- LCD Back-Light Illumination
  36
- Vibrator
  37
- Bluetooth
  38
- Circuit Description
  39
4 Trouble Shooting

55
- RF Component
  55
- RX Trouble
  56
- TX Trouble
  61
- Power on Trouble
  67
- Charging Trouble
  69
- Vibrator Trouble
  71
- LCD Trouble
  73
- Camera Trouble
  76
- Speaker & Receiver Trouble
  79
- SIM Card Interface Trouble
  81
- Earphone Trouble
  83
- KEY Backlight Trouble
  85
- Microphone Trouble
  87
- RTC Trouble
  89
- Slide On/Off Trouble
  91
5 Download

93
6 Block Diagram

99
7 Circuit Diagram

100
8 BGA IC Pin Check

108
9 Pcb Layout

112
10 Engineering Mode

116
- BB Test [MENU 1]
  117
- RF Test [MENU 2]
  119
- MF Mode [MENU 3]
  119
  - Sar Test
    119
  - All Auto Test
    119
  - Key Pad
    119
- Trace Option [MENU 4]
  120
- Call Timer [MENU 5]
  120
- Fact. Reset [MENU 6]
  120
- S/W Version
  120
11 Stand Alone Test

121
- Introduction
  121
- Setting Method
  121
- Means of Test
  122
12 Auto Calibration

124
- Overview
  124
- Equipment List
  124
- Test Jig Operation
  125
- Procedure
  126
- Agc
  129
- Apc
  129
- Adc
  129
13 Exploded View & Replacement Part List

130
- Exploded View
  130
- Replacement Parts
  132
- Main Component
  135
- Accessory
  150

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