LG 42LC2RR Service Manual

R
LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MF-056M
FACTORY MODEL : 42LC2RR-ZL
MODEL : 42LC2RR
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

LG 42LC2RR Specifications

General

Audio system	Nicam
RMS rated power	30 W
Number of speakers	2
Noise reduction	Yes
Comb filter	Digital
Response time	8 ms
Display diagonal	42 \
Display brightness	500 cd/m²
Display resolution	1366 x 768 pixels
Display technology	LCD
Native aspect ratio	16:9
Contrast ratio (typical)	1600:1
Channels quantity	100 channels
Audio (L/R) in	1
Product color	Black

Weight and Dimensions

Depth (without stand)	302 mm
Width (without stand)	1054 mm
Height (without stand)	813 mm
Weight (without stand)	41500 g

Summary

Safety Precautions

Important Safety Notice

General safety advice and critical notices for service technicians.

General Service Guidance

General rules and recommendations for safe servicing operations.

AC Leakage Current Checks

Procedures for performing cold and hot checks of AC leakage current.

Servicing Precautions

General Servicing Precautions

General rules and recommendations for safe servicing operations.

Handling Electrostatic Sensitive Devices

Guidelines for preventing damage to ES devices during handling.

Soldering Guidelines

Best practices and techniques for effective and safe soldering.

Component Replacement Procedures

IC and Transistor Replacement

Detailed methods for removing and replacing ICs and transistors.

Diode, Fuse, and Resistor Replacement

Procedures for replacing diodes, fuses, and conventional resistors.

Circuit Board Foil Repair

Techniques for repairing damaged copper foil patterns on circuit boards.

Product Specifications

Application Range and General Specifications

Defines applicable models and general TV specifications.

Detailed Specifications

Specific technical parameters, test conditions, and requirements.

LCD Module and Video Input Specs

Optical characteristics, mechanical dimensions, and video input compatibility.

PC, DTV, and HDMI Input Specifications

Supported timings and resolutions for PC, DTV, and HDMI inputs.

Mechanical Specifications

Scart Connector Arrangements

Pinouts, signal levels, and impedance for Scart connectors.

Adjustment Instructions

Initial Setup and Software

Application range, specifications, and LGIDS software setup.

Channel Memory and Sub Program Downloads

Procedures for channel memory and Hudson sub program downloads.

DVR Sub Program Download

Steps for downloading sub programs for the DVR functionality.

EDID and DDC Data

EDID Data Structure

Manufacturer, version, and revision information for EDID.

Analog and HDMI EDID Data Tables

Raw EDID data tables for analog and HDMI inputs.

Calibration Procedures

EDID Options and ADC Calibration Overview

Mapping EDID options and introduction to ADC calibration.

RF/AV/S-VIDEO and Component Calibration

Procedures for calibrating RF, AV, S-Video, and Component inputs.

RGB and DVR Calibration

Procedures for calibrating RGB and DVR color balance.

White Balance Adjustment Setup

Test equipment and target values for white balance adjustment.

Manual White Balance Procedure

Step-by-step guide for performing manual white balance adjustment.

Regional Settings

Language Group Selection

Options for selecting language groups for regional Teletext.

Service Remote Control Functions

Power and Basic Functions

Control functions for power, mute, and input selection.

Adjustment and Navigation Keys

Keys used for entering adjustment modes and navigating menus.

PIP and Teletext Keys

Keys related to Picture-in-Picture and Teletext functions.

Troubleshooting Guide

No Power Troubleshooting

Diagnosing and resolving power-related issues.

Protect Mode and No Raster Issues

Troubleshooting for protect mode and lack of raster.

OSD Display Troubleshooting

Diagnosing and resolving problems with the On-Screen Display.

Input Signal Display Problems

Troubleshooting issues with RF, AV, Component, RGB, HDMI inputs.

No Sound Troubleshooting

Diagnosing and resolving audio output problems.

DVR Troubleshooting

Time Shift Mode Issues

Troubleshooting problems with time shift mode on the DVR board.

Sound and Recorded Video Issues

Troubleshooting audio and recorded video playback on DVR.

System Block Diagrams

Overall Europe Block Diagram

High-level diagram of the TV's main components and interconnections.

DVR Subsystem Block Diagram

Detailed block diagram of the DVR functionality.

Exploded View and Parts List

Exploded View Diagram

Visual representation of the TV's physical components.

Detailed Parts List

Comprehensive list of replacement parts with part numbers.

Component Breakdown Details

Detailed listing of electronic components like capacitors, resistors, diodes, and ICs.