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LG 42LM3400-DB User Manual

LG 42LM3400-DB
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Printed in KoreaP/NO : MFL67362819 (1205-REV00)
CHASSIS : LT21C
MODEL : 42LM3400 42LM3400-DB
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED LCD TV
SERVICE MANUAL
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 42LM3400-DB Specifications

General IconGeneral
Screen Size42 inches
Display TypeLCD
BacklightLED
Refresh Rate60 Hz
HDMI Ports3
USB Ports1
Smart TVNo
Energy RatingA
Resolution1920 x 1080 pixels
Audio Output10W + 10W

Summary

SAFETY PRECAUTIONS

General Guidance

General advice for servicing, including isolation transformer use.

Leakage Current Checks

Procedures for cold and hot AC leakage current testing.

SPECIFICATION

Application Range

Scope of the specification sheet for TV models.

Test Conditions

Environmental and power parameters for testing.

Test Methods

Standards and procedures for product testing.

General Specification

Screen Size Details

List of screen sizes and corresponding panel models.

Aspect Ratio Information

Supported aspect ratios for the TV models.

LCD Module Specifications

Details on LCD module resolutions and part numbers.

Operating Environment

Temperature and humidity for TV operation.

Storage Environment

Temperature and humidity for TV storage.

Input Voltage and Power Consumption

Supported input voltages and power usage data.

External Input Support Format

Component Input Formats

Supported resolutions and frequencies for component video.

RGB Input (PC) Formats

PC resolutions, frequencies, and pixel clocks for RGB input.

HDMI EDID Data

HDMI EDID data specifications for PC and DTV modes.

3D Mode Input Formats

Supported resolutions and frequencies for 3D input.

ADJUSTMENT INSTRUCTION

Application and Designation

Scope and purpose of the adjustment procedures.

Main PCB Check Process

Steps for checking the main PCB using Mstar ISP Utility.

USB Software Download Process

Instructions for updating TV software via USB.

Tool Option Adjustment Procedure

Steps to adjust tool options after software update.

ADC Process and Calibration

Guides through ADC adjustment and calibration steps.

Function Check Procedures

Checks for display, sound, and other TV functions.

MAC Address Management

Procedures for reading, editing, and downloading MAC addresses.

TROUBLE SHOOTING

No Power Troubleshooting

Flowchart for diagnosing and resolving power issues.

No Raster Troubleshooting

Steps to identify and fix display output problems.

PC Signal Troubleshooting

Diagnoses issues related to PC input signals.

Component/HDMI Signal Issues

Troubleshooting steps for Component and HDMI input failures.

AV/RF Signal Troubleshooting

Resolving problems with AV and RF signal reception.

No Sound Troubleshooting

Flowchart for diagnosing and fixing audio output problems.

BLOCK DIAGRAM

System Block Diagram

Illustrates the interconnected main components and modules of the TV.

EXPLODED VIEW

TV Assembly Exploded View

Shows physical layout and part identification of the TV assembly.

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