LG 28MT45M User Manual

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 :
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
MFL68127250 (1407-REV00)
28MT45M 28MT45M-PMP
LW45A
LED TV

LG 28MT45M Specifications

General

Brand	LG
Model	28MT45M
Category	LED TV
Language	English

Summary

SAFETY PRECAUTIONS

Important Safety Notices

Key safety warnings and component identification.

General Guidance and Leakage Checks

Advice on isolation transformers, component handling, and leakage current testing.

SERVICING PRECAUTIONS

General Servicing Precautions

Rules for general servicing, cleaning, and handling parts.

Electrostatic Discharge (ESD) Precautions

Guidelines for handling sensitive electronic components.

Soldering Guidelines

Best practices for soldering, including tool selection and technique.

COMPONENT REPLACEMENT PROCEDURES

Component Replacement Procedures

Procedures for replacing ICs, transistors, diodes, fuses, and resistors.

Circuit Board Foil Repair

Techniques for repairing damaged copper patterns on circuit boards.

SPECIFICATIONS

Application Range and Product Specs

Scope, test conditions, and environmental requirements.

Test Methods

Specifies standards for performance and other tests.

Interface Specifications

Details for RGB-PC and HDMI inputs, including resolutions and frequencies.

RGB Input (PC) Specifications

Detailed table of RGB input resolutions and frequencies.

HDMI Input (DTV) Specifications

Detailed table of HDMI input resolutions and frequencies.

ADJUSTMENT INSTRUCTIONS

Application Range and Specifications

Specifies the application range and conditions for adjustments.

Main PCBA Adjustments

Procedures for ADC calibration and EDID data download.

ADC Calibration

Procedure for automatic adjustment of Analog-to-Digital Converter calibration.

EDID Data Download

Information on EDID data and download procedures for optimal resolution.

FINAL ASSEMBLY ADJUSTMENT

White Balance Adjustment

Overview, equipment, connection, and protocol for white balance adjustment.

SPECIALIZED PROCEDURES AND TESTS

Tool Option Selection and Ship-out Check

Selecting tool options and verifying ship-out mode.

GND and Hi-Pot Testing

Preparation, execution, and checkpoints for ground and hi-pot tests.

Audio Output Specifications

Measurement conditions for audio output performance.

SERVICE OPERATIONS

USB Software Download

Instructions for downloading software via USB for service.

Optional Adjustments

Procedures for manual ADC and White Balance adjustments.

Manual ADC Calibration

Steps for manual adjustment of ADC calibration.

Manual White Balance Adjustment

Detailed steps for manual white balance adjustment.

TROUBLESHOOTING: NO POWER

No Power - Main PCBA

Flowchart for diagnosing and resolving no power issues.

TROUBLESHOOTING: NO RASTER

No Raster (Black Screen)

Flowchart for diagnosing no raster or black screen issues.

TROUBLESHOOTING: ABNORMAL/NO SCREEN

Abnormal/No Screen (All Inputs)

Troubleshooting for abnormal or no screen across all inputs.

TROUBLESHOOTING: ABNORMAL SCREEN (AV)

Abnormal Screen (AV Input)

Flowchart for diagnosing abnormal screens with AV input.

TROUBLESHOOTING: ABNORMAL SCREEN (RGB)

Abnormal Screen (RGB PC Input)

Flowchart for diagnosing abnormal screens with RGB PC input.

TROUBLESHOOTING: ABNORMAL SCREEN (HDMI)

Abnormal Screen (HDMI Input)

Flowchart for diagnosing abnormal screens with HDMI input.

TROUBLESHOOTING: NO SOUND

No Sound (All Sources)

Flowchart for diagnosing and resolving no sound issues from all sources.

TROUBLESHOOTING: ABNORMAL SOUND (AV)

Abnormal Sound (AV Input)

Troubleshooting for abnormal sound with AV input.

TROUBLESHOOTING: ABNORMAL SOUND (HDMI)

Abnormal Sound (HDMI Input)

Troubleshooting for abnormal sound with HDMI input.

BLOCK DIAGRAM

EXPLODED VIEW