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LG 21FS4RLX Service Manual

LG 21FS4RLX
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 Specifications

General IconGeneral
BrandLG
Model21FS4RLX
CategoryTV
LanguageEnglish

Summary

Safety Precautions

Important Safety Notice

Critical safety characteristics and replacement guidelines to prevent hazards.

General Guidance

Advice on isolation transformers and safe component handling.

X-RAY Radiation Warning

Procedures and warnings for X-ray radiation protection during servicing.

Leakage Current Hot Check Circuit

Circuit diagram for performing AC leakage current checks.

Description of Controls

Remote Control Functions

Covers handset operation, number buttons, menu access, and navigation.

Picture and Sound Adjustments

Includes volume, mute, PIP, eye function, and favourite program selection.

System Navigation and Special Features

Covers TV/AV mode, list display, teletext, sleep timer, and language selection.

Side Panel Controls

Front Panel Buttons and Indicators

Main Power, Indicator, Sensor, Menu, OK, Volume, Program controls.

AV Input Socket

Describes the AV IN2 connection for external devices.

Eye Function Control

Adjusts picture based on ambient light.

Specifications

Scope of Specifications

Defines the applicability of specifications to CW62B Chassis.

Test and Inspection Methods

Outlines TV testing standards and procedures.

Test Conditions

Specifies environmental and power conditions for testing.

General Specifications

Lists general technical parameters of the television.

Adjustment Instructions

Adjustment Overview and Notes

Covers application object, important notes, and focus adjustment.

CRT Purity and Convergence

Details steps for color purity and convergence alignment.

Picture Parameter Adjustments

Covers screen voltage, white balance, and deflection data adjustments.

SVC Default Data

Service 1 Data

Default settings for AGC, gain, and other parameters.

Service 3 Data

Default settings for modulation and volume control.

Service 4 Data

Default settings for picture enhancement features.

Option Data (1-4)

Default settings for various optional features.

Option Adjustment (PAL)

Option Adjustment Procedure

Steps to adjust options using the remote control.

Sound Pre-Scaler Specification

Audio out level specifications for different sound systems.

In-Stop Condition

Conditions related to the in-stop function.

SVC Remote Control

Adjustment Remote Layout

Illustration of the remote control used for adjustments.

Troubleshooting

Picture OK, No Sound

Flowchart for diagnosing picture issues with no sound.

No Raster, Sound OK

Flowchart for diagnosing no raster with sound present.

No Picture, No Sound

Flowchart for diagnosing issues with no picture and no sound.

Printed Circuit Board

Side A/V Board

Block Diagram

Exploded View

Exploded View Parts List

Replacement Parts List

Switch Components

Spark Gap, Axial

Filter & Crystal Components

Miscellaneous Components

Accessories

Schematic Diagram

SVC Sheet

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