LG 42PT81 User Manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PP7BA
MODEL : 42PT81 42PT81-ZB
website:http://biz.LGservice.com
Internal Use Only

LG 42PT81 Specifications

General

Brand	LG
Model	42PT81
Category	Plasma TV
Language	English

Summary

Safety Precautions

General Guidance for Servicing

General advice for servicing procedures and safety.

Leakage Current Hot Check Procedure

Procedure for checking AC leakage current with a hot chassis.

Leakage Current Cold Check Procedure

Procedure for checking AC leakage current with a cold chassis.

Specifications Overview

Adjustment Instructions

PCB Assembly Adjustment Items

Specific adjustment procedures for the Printed Circuit Board assembly.

SET Assembly Adjustment Items

Adjustment procedures for the assembled set components.

HDD Assembly Adjustment Method

Procedures for HDD formatting and adjustment.

Detailed Adjustment Procedures

Power PCB Voltage Adjustments

Va and Vs voltage adjustments for the power board.

Video Input Adjustments

RF, AV, and S-VIDEO Adjustment

Procedures for RF, AV, and S-Video adjustments.

Auto RF/AV/S-VIDEO Color Balance Method

Specific method for auto color balance adjustment.

Color Balance Adjustments

Component Input Adjustment

Procedures for component video adjustments.

RGB Input Adjustment

White Balance Adjustment

Manual White Balance Procedure

Auto White Balance Procedure

Troubleshooting Guide

No Power Symptom and Check

Troubleshooting steps for no power issue.

Protect Mode Symptom and Check

Troubleshooting steps for protect mode.

No Raster Symptom and Check

Troubleshooting steps for no raster display.

Display Issues Troubleshooting

Unusual Display in RF Mode (Main)

Unusual Display in Rear AV Mode (Main)

Unusual Display in Rear S-Video Mode (Main)

Unusual Display in Side AV Mode (Main)

Unusual Display in Side S-Video Mode (Main)

Unusual Display in SCART 1 Mode (Main)

Unusual Display in SCART 1 RGB Mode (Main)

Unusual Display in SCART 2 Mode (Main)

Unusual Display in SCART 2 YC Mode (Main)

Unusual Display in RF Mode (Sub)

PIP Display Issues (Sub)

Unusual Display in Component 1 Mode (Main/Sub)

Unusual Display in Component 2 Mode (Main/Sub)

Unusual Display in RGB Mode (Main/Sub)

Audio and HDMI Issues Troubleshooting

No Sound Symptom and Check

Troubleshooting steps for no sound issue.

HDMI Mode Issues