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LG 42LD420 Service Manual

LG 42LD420
43 pages
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LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LD01B
MODEL : 42LD450 42LD450-ZA
MODEL : 42LD450N 42LD450N-ZA
MODEL : 42LD458 42LD458-ZA
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 : MFL62863003 (1001-REV00)

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LG 42LD420 Specifications

General IconGeneral
Product colorBlack
Panel mounting interface200 x 200 mm
Display diagonal42 \
Display brightness- cd/m²
Display technologyLCD
Native aspect ratio16:9
Contrast ratio (dynamic)60000:1
RMS rated power20 W
Number of speakers2
Weight and Dimensions IconWeight and Dimensions
Depth (with stand)297 mm
Width (with stand)1028 mm
Height (with stand)715.4 mm
Weight (with stand)17400 g
Depth (without stand)87.8 mm
Height (without stand)658.6 mm
Weight (without stand)15600 g

Summary

Safety Precautions

General Guidance

General safety guidelines for servicing the chassis and preventing electrical shocks.

Leakage Current Checks

Procedures for performing cold and hot AC leakage current checks.

Servicing Precautions

General Servicing Precautions

Essential precautions for general servicing, including component handling and cleaning.

Electrostatically Sensitive Devices (ESD) Handling

Guidelines for handling sensitive electronic components to prevent ESD damage.

Soldering Best Practices

Recommended techniques and tools for soldering, ensuring quality and safety.

Specification

Application Range and Test Requirements

Defines the scope and conditions for product testing and specifications.

Test Methods

Outlines the procedures and standards used for product testing.

Module General Specifications

Details the main physical and functional attributes of the LCD module.

Module Optical Specifications

Specifies optical performance parameters like viewing angle and contrast ratio.

Component Video Input

Lists supported video input formats for Component video.

RGB (PC) Input

Lists supported video input formats for RGB (PC) signals.

HDMI Input

Lists supported video input formats for HDMI signals.

Adjustment Instruction

Designation and Preparation

Outlines the purpose, equipment, and initial setup for adjustments.

PCB Check and Software Update

Details procedures for checking the PCB and updating the TV software.

Calibration Processes

Explains the ADC process and tool option selection for calibration.

Function Check and Downloads

Covers function checks and software download procedures.

Block Diagram

Exploded View

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