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LG 21FS4RLX-ZV User Manual

LG 21FS4RLX-ZV
29 pages
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COLOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : CW62B
MODEL: 21FS4RLX
MODEL: 21FS4RLX-ZV
website:http://biz.lgservice.com
Sep., 2007
Printed in ChinaP/NO : MFL31616401
Internal Use Only
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LG 21FS4RLX-ZV Specifications

General IconGeneral
Display TechnologyCRT
Aspect Ratio4:3
Sound OutputMono
Screen Size21 inches
InputsComposite

Summary

Safety Precautions

Important Safety Notices

Critical safety warnings and mandatory precautions for service personnel to prevent hazards.

General Safety Guidance

Guidelines for safe handling and operation during servicing to prevent electrical shock and fire.

X-Ray Radiation Safety

Precautions related to X-ray emission from the CRT and high-voltage sections.

AC Leakage Current Testing

Procedures for checking AC leakage to prevent electrical shock hazards on exposed parts.

TV Controls and Operation

Remote Control Overview

Introduction to the remote control handset and its primary functions for TV operation.

Remote Control Button Functions

Detailed descriptions of individual buttons on the remote control and their functions.

TV Controls and Connections

Front Panel Controls

Identification and function of controls located on the front panel of the TV set.

Side Panel Ports

Description of input and output connectors found on the side panel of the TV.

Product Specifications

Scope and Testing Conditions

Defines the applicability of specifications and outlines testing methodologies.

General Technical Specifications

Detailed technical parameters and features of the television set.

Service Adjustment Procedures

Focus Adjustment

Steps for adjusting the picture focus using specific patterns and controls.

Purity and Convergence Adjustment

Procedures for optimizing color purity and screen convergence for accurate display.

Service Adjustment Procedures

Screen Voltage Adjustment

Method for adjusting screen voltage for optimal picture display and clarity.

White Balance Adjustment

Process for setting white balance parameters for accurate color reproduction.

Deflection Setting Adjustment

Steps for configuring deflection parameters to ensure proper picture geometry.

Deflection Setting Adjustments

Deflection Parameter Tuning

Fine-tuning of various horizontal and vertical deflection parameters for picture alignment.

Deflection Initial Data

Initial data settings for deflection adjustments based on specific TV models.

System Data and Options

Service Default Data

Default data settings managed by the EEPROM master for system operation.

Option Settings

Configuration options for various TV features, modes, and functionalities.

System Configuration

OSD and Language Settings

Settings for On-Screen Display menus and supported language options.

In-Stop Conditions and Sound

Conditions for operation stop and sound pre-scaler settings.

Option Adjustment Details

Specific adjustments for various option parameters for system customization.

SVC Remote Control

SVC Remote Layout and Functions

Diagram and description of the special service remote control buttons and their usage.

Troubleshooting Guide

Picture/Sound Troubleshooting

Diagnostic steps for issues related to picture or sound output problems.

Raster/Sound Troubleshooting

Diagnostic steps for issues where there is no raster or no sound output.

Troubleshooting Guide

No Raster Troubleshooting (Part 2)

Further diagnostic steps for problems related to the absence of a raster scan.

Troubleshooting Guide

No Picture/Sound Troubleshooting

Diagnostic flowcharts for cases with no picture and no sound output.

Printed Circuit Board Layouts

Main PCB Diagram

Visual layout of the main printed circuit board with component identification.

Printed Circuit Board Layouts

Side A/V PCB Diagram

Visual layout of the side A/V input/output printed circuit board.

System Block Diagram

Overall System Architecture

Diagram illustrating the interconnected functional blocks of the TV system.

Exploded View and Parts

Component Assembly Diagram

Illustration showing the exploded view and assembly of TV components.

Exploded View Parts List

Component Part Details

List of part numbers and descriptions for components in the exploded view.

Replacement Parts List

Component Replacements

Comprehensive list of all replaceable components including ICs, transistors, resistors, capacitors, and accessories.

Schematic Diagram

CW62B Chassis Circuit Diagram

Detailed circuit diagram of the CW62B chassis, showing component interconnections.

Service Sheet Reference

SVC Sheet Identifier

Reference number for the specific service sheet pertaining to the TV model.

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