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LG 21FB5RB-TH User Manual

LG 21FB5RB-TH
29 pages
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COLOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MC-059B
MODEL: 21FB5RB/RG/RGE/RL
MODEL:
21FB5RB/RG/RGE/RL-TH
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
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LG 21FB5RB-TH Specifications

General IconGeneral
Display TechnologyCRT
Aspect Ratio4:3
Screen Size21 inches
InputsComposite, S-Video
TV StandardPAL/SECAM/NTSC

Summary

SAFETY PRECAUTIONS

Important Safety Notice

Critical safety warnings and guidance for servicing the chassis.

X-Ray Radiation Warning

Details the source of X-ray radiation and precautions for its prevention.

AC Leakage Current Checks

Explains procedures for performing cold and hot AC leakage current checks.

DESCRIPTION OF CONTROLS

SPECIFICATIONS

ADJUSTMENT

AGC Voltage Adjustment

Procedures for adjusting the Automatic Gain Control voltage.

Screen Voltage Adjustment

Manual adjustment of screen voltage using the SVC remote control.

Purity and Convergence Adjustment

Steps for adjusting picture purity and convergence using magnets and instruments.

PRINTED CIRCUIT BOARD

BLOCK DIAGRAM

TROUBLE SHOOTING

SMPS Troubleshooting

Diagnosing issues within the SMPS primary and secondary sections.

Vertical Section Troubleshooting

Troubleshooting common problems in the vertical deflection and output stages.

Horizontal Section Troubleshooting

Diagnosing issues related to the horizontal drive, output, and compensation sections.

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