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LG RT-21CC25M User Manual

LG RT-21CC25M
29 pages
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COLOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MC-049B
MODEL:RT-21CC25M/RX
MODEL:RT-21CC25V/VM/VX
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
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LG RT-21CC25M Specifications

General IconGeneral
Display TechnologyCRT
TV StandardPAL/SECAM
Remote ControlYes
Aspect Ratio4:3
Screen Size21 inches
InputsAV

Summary

SAFETY PRECAUTIONS

Safety Guidance and Notices

Covers important safety notices, general guidance for servicing, and X-ray radiation protection.

AC Leakage Current Checks

Provides detailed procedures for performing AC leakage current checks for safety compliance.

DESCRIPTION OF CONTROLS

Remote Control Handset Overview

Details the functions of various buttons on the remote control handset.

Additional Remote Control Functions

Explains the operation of additional remote control buttons like LIST, SLEEP, SSM, etc.

Front Panel Controls

SPECIFICATIONS

Scope and Test Requirements

Defines the scope of specifications and the conditions required for testing.

General Specifications

Lists the general technical specifications for the TV chassis, including receiving systems and screen size.

ADJUSTMENT INSTRUCTIONS

Preparation and Notes

Covers application object, general notes for servicing, and preliminary steps for adjustments.

Focus Adjustment Procedure

Details the steps involved in adjusting the focus for the CRT display.

Purity and Convergence

Explains procedures for performing color purity and convergence adjustments on the display.

Screen Voltage and White Balance

Procedures for adjusting screen voltage and performing white balance calibration.

Deflection Setting Data Adjustment

Steps for adjusting deflection data using a SVC communicator, including preparation.

OPTION Adjustment

Option Settings Preparation

Details on preparing and inputting option data for model-specific functions.

Option Function Tables

Lists functions available via OPTION1, OPTION2, and OPTION3 settings.

OPTION4 Function Details

Details the specific functions available through the OPTION4 setting.

TROUBLE SHOOTING

Picture OK / No Sound Troubleshooting

Flowchart to diagnose and resolve issues where the picture is displayed but there is no sound.

No Raster Troubleshooting

Flowchart to diagnose and resolve issues when no raster is displayed on the screen.

No Picture / No Sound Troubleshooting

Flowchart to diagnose and resolve issues when there is neither picture nor sound.

AV Stereo/Mono Troubleshooting

Flowchart for troubleshooting AV input issues in stereo or mono modes.

PRINTED CIRCUIT BOARD

SIDE A/V BOARD DIAGRAM

BLOCK DIAGRAM

EXPLODED VIEW

EXPLODED VIEW PARTS LIST

REPLACEMENT PARTS LIST

IC and Transistor Parts

List of replacement Integrated Circuits (ICs) and Transistors.

Diode and Capacitor Parts

List of replacement Diodes and Capacitors.

Capacitor and Inductor Parts

List of replacement Capacitors and Inductors.

Coil, Inductor, and Resistor Parts

List of replacement Coils, Inductors, and Resistors.

Resistor Part Listings

Detailed list of replacement resistors with their specifications.

Switches, Jacks, and Accessories

List of replacement switches, jacks, accessories, and miscellaneous items.

MC-049B CIRCUIT DIAGRAM

SERVICE SHEET

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