LG RF/RT-20/21CA80VE/VQ/VW User Manual

COLOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MC-019A
MODEL : RF/ RT-20/21CA80VE/VQ/VW
MODEL : RF/RT -14/21CA80M/MX
MODEL : CF-21CA810EX/RF-21CB90VQ
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

LG RF/RT-20/21CA80VE/VQ/VW Specifications

General

Brand	LG
Model	RF/RT-20/21CA80VE/VQ/VW
Category	TV
Language	English

Summary

Safety Precautions

General Guidance

General advice for safe servicing practices and technician protection.

X-RAY Radiation

Information on X-ray sources and necessary precautions during servicing.

Leakage Current Cold Check

Procedure for checking AC leakage current when the set is not powered.

Leakage Current Hot Check

Procedure for testing AC leakage current while the set is powered on.

Servicing Precautions

General Servicing Precautions

Fundamental safety rules and procedures for servicing the TV receiver.

Specifications

Descriptions of Controls

Front Panel

Disassembly Instructions

CPT (Picture Tube) Removal

Specific procedures for the safe removal of the picture tube assembly.

Adjustment

Safety Precautions for Adjustment

Focus Adjustment

Screen Voltage Adjustment

AGC Adjustment

White Balance Adjustment

Deflection Data Adjustment

Purity & Convergence Adjustment

General Cautions for Purity and Convergence

Purity Adjustment Procedure

Step-by-step guide for adjusting the color purity of the picture tube display.

Convergence Adjustment Procedure

Detailed steps to align the red, green, and blue electron beams for sharp image convergence.

Block Diagram

Schematic Diagram

Printed Circuit Board

Component Location Guide