LG 21FB7RB/RG User Manual

COLOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MC-059A
MODEL: 21FB7RB/RG
MODEL: 21FB7RB/RG-TD
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
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LG 21FB7RB/RG Specifications

General

Aspect Ratio	4:3
Sound Output	Mono
Display Type	CRT
Screen Size	21 inches
TV Type	CRT
Connectivity	RF Input

Summary

COLOR TV SERVICE MANUAL

CAUTION

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Identifies safety-related parts and warns against design modification.

X-RAY Radiation Warning

DESCRIPTION OF CONTROLS

Remote Control Handset

Details functions of buttons on the remote control for TV operation.

SPECIFICATIONS

ADJUSTMENT PROCEDURES

AGC Voltage Adjustment

Step-by-step guide for adjusting the Automatic Gain Control (AGC) voltage.

Screen Voltage Adjustment

Instructions for manually adjusting the screen voltage for optimal display.

Purity and Convergence Adjustment

Procedures for correcting picture purity and convergence issues.

White Balance and Focus Adjustments

White Balance Adjustment

Details automatic and manual methods for calibrating white balance.

Focus Voltage Adjustment

Describes how to adjust focus voltage for a sharp picture.

BLOCK DIAGRAM

SMPS (Switch Mode Power Supply)

SMPS Primary Section

SMPS Secondary Section

VERTICAL AND HORIZONTAL SECTIONS

VERTICAL SECTION

HORIZONTAL SECTION

SOUND AND CPT DRIVE SECTIONS

SOUND PROCESSING SECTION

CPT DRIVE SECTION

REPLACEMENT PARTS LIST