LG 42LD452B - User Manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LA01Z
MODEL : 42LD452B
42LD452B-UA
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
Printed in KoreaP/NO : MFL66679907 (1105-REV00)

Summary

LCD TV SERVICE MANUAL

SAFETY PRECAUTIONS

General Guidance

Safety information and general servicing procedures.

Leakage Current Hot Check

Procedure for checking AC leakage current.

SERVICING PRECAUTIONS

General Servicing Precautions

Electrostatically Sensitive (ES) Devices

SPECIFICATION

ADJUSTMENT INSTRUCTION

Adjustment items

Specific adjustments for board and final assembly.

Automatic Adjustment

Process for automatic adjustment, including ADC calibration.

Manual Adjustment

5.1. ADC Adjustment

Manual procedure for ADC calibration, equipment and steps.

5.2 EDID;DDC Download

5.3. White Balance Adjustment

How to adjust white balance for optimal color reproduction.

GND and Internal Pressure check

EXPLODED VIEW

LD450 C Block Diagram

Video Signal Block

Audio Signal Block

POWER Block (+3.5 V_ST)

POWER Block (+24 V & 12 V)

POWER Block (+3.3 V_Normal)

POWER Block (+5 V_Normal)

LG 42LD452B Specifications