LG KM380t Manuals

LG KM380t Manuals

Manuals and User Guides for LG KM380t. We have 1 LG KM380t manual available for free PDF download: Service Manual

LG KM380t Service Manual

LG KM380t Service Manual (148 pages)

Brand: LG | Category: Cell Phone | Size: 10.26 MB

Table of Contents

Table of Contents
4
1 Introduction

6
- Purpose
  6
- Regulatory Information
  6
- Abbreviation
  8
2 Performance

10
- H/W Features
  10
- Technical Specification
  11
3 Technical Brief

18
- Km380T Series Component Block Diagram
  18
- Baseband Processor (BBP) Introduction
  19
- Power Management IC
  29
- Power ON/OFF
  33
- SIM Interface
  34
- Micro SD External Memory Interface
  35
- Memory
  36
- LCD Display
  37
- Keypad Switching & Scanning
  39
- Keypad Back-Light Illumination
  40
- LCD Back Light Illumination
  41
- Isp(Image Signal Processor)
  42
- Battery Current Consumption Monitor
  43
- JTAG & ETM Interface Connector
  44
- Audio
  45
- Charging Circuit
  48
- Bluetooth
  49
- FM Radio
  51
- 18Pin Multi Media Interface Connector
  52
4 RF Circuit Technical Brief

54
- General Description
  54
- Receiver Part
  56
- Transmitter Part
  57
- RF Synthesizer
  58
- Dcxo
  59
- Front End Module Control
  59
- Power Amplifier Module
  60
5 PCB Layout

61
- Main PCB Component Placement
  61
6 Trouble Shooting

63
- Trouble Shooting Test Setup
  63
- Power on Trouble
  64
- Charging Trouble
  67
- LCD Display Trouble
  69
- Camera Trouble
  71
- Receiver & Speaker Trouble
  73
- Microphone Trouble
  75
- Ear-MIC Jack Detection Trouble
  76
- Vibrator Trouble
  77
- Keypad Back Light Trouble
  78
- SIM & Usd Trouble
  79
- RF Troubleshooting
  82
- RF Receiver Path Troubleshooting
  86
- RF Transmitter Path Troubleshooting
  89
- PAM Circuit
  91
7 Download & S/W Upgrade

94
- Download Program User Guide
  94
- Multi-Download Program Setting
  95
8 Circuit Diagram

98
9 Bgm Pin Map

104
10 Pcb Layout

110
11 RF Calibration

112
- Test Equipment Setup
  112
- Calibration Step
  112
12 Stand-Alone Test

118
- Test Program Setting
  118
- Tx Test
  120
- Rx Test
  121
13 Engineering Mode

122
14 Exploded View & Replacement Part List

124
- Exploded View
  124
- Replacement Parts
  126
- Main Component
  129
- Accessory
  146

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