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LG 32LH4000 - User Manual

LG 32LH4000
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LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LD91A
MODEL : 32LH4000
32LH4000-ZA
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
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LG 32LH4000 Specifications

General IconGeneral
Screen Size32 inches
Display TypeLCD
Resolution1366 x 768
Display Format720p
Aspect Ratio16:9
Refresh Rate50Hz
Brightness500 cd/m²
Response Time5 ms
HDMI Ports3
USB Ports1
Component Video Input1
Composite Video Input1
PC Input1 (D-sub)
RF Input1
Speaker System2 Speakers
Sound Output (RMS)20W
Sound Output20 W
Viewing Angle178° (H) / 178° (V)
Contrast Ratio50, 000:1 (Dynamic)

Summary

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Critical safety warnings for service personnel.

General Guidance

Basic safety principles for handling electrical equipment.

Leakage Current Cold Check

Procedure to check for AC leakage current with plug removed.

Leakage Current Hot Check

Procedure to check for AC leakage current with power applied.

SERVICING PRECAUTIONS

General Servicing Precautions

Standard precautions during repair and maintenance procedures.

Electrostatically Sensitive Devices

Handling guidelines for static-sensitive electronic components.

General Soldering Guidelines

Best practices for soldering components on circuit boards.

Circuit Board Foil Repair

Methods for repairing damaged copper traces on circuit boards.

SPECIFICATIONS

Electrical Specifications

Detailed electrical characteristics and parameters of the TV.

ADJUSTMENT INSTRUCTIONS

ADC Process and Calibration

Detailed steps for Analog-to-Digital Converter calibration.

White Balance Adjustment

Method for adjusting the white balance of the display.

V-COM Adjustment Procedure

Method for adjusting the V-COM voltage for liquid crystal driving.

TROUBLESHOOTING

TV;CATV Display Issues

Diagnostic steps for no display on TV or CATV signals.

DTV Display Issues

Diagnostic steps for no display on Digital TV signals.

AV Input Display Issues

Diagnostic steps for no display on AV input signals.

Component Input Display Issues

Diagnostic steps for no display on Component input signals.

RGB PC Input Display Issues

Diagnostic steps for no display on RGB PC input.

HDMI Input Display Issues

Diagnostic steps for no display on HDMI input.

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