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LG 42LV4400 User Manual

LG 42LV4400
137 pages
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MODEL : 42LV4400_LC420EUG-RDV2-7R1
47LV4400_LC470EUG-RDV2-KR1
P/NOSG-0000034 (REV01) Printed in Taiwan

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LG 42LV4400 Specifications

General IconGeneral
Screen Size42 inches
Resolution1920 x 1080
Display TypeLCD
BacklightLED
Refresh Rate60 Hz
HDMI Ports3
USB Ports1
Audio Output10W x 2
Aspect Ratio16:9
Smart TVNo
Built-in Wi-FiNo
3D CapableNo

Summary

LG LCD TV Service Manual

Chapter 2 Specifications

TFT LCD Panel Specifications

Detailed specifications of the TFT LCD panel.

Weight and Precautions

Weight details and critical handling precautions.

Mounting Precautions

Guidelines for safe and proper mounting procedures.

Operating and ESD Precautions

Precautions for proper operation and ESD control.

Storage and Film Handling Precautions

Guidelines for storage and handling of protective film.

Chapter 4 Factory Preset Timings

RGB VESA Standard Timings

Timing chart for RGB signals according to VESA standards.

Chapter 5 Pin Assignments

HDMI Connector Pin Assignments

Pin assignments for HDMI connectors.

Chapter 6 Main Board I/O Connections

J4 Connector (Main BD to Power BD)

Pin assignments for the J4 connector between Main and Power boards.

TCN1 and TCN2 Connection Details

Pin assignments and descriptions for TCN1 and TCN2 connections.

Chapter 7 Theory of Circuit Operation

Keypad Operation and MT5376 Chipset

Explanation of keypad operations and MT5376 chipset features.

System Block Diagram and Host CPU Features

System architecture diagram and Host CPU features.

Flash Memory: MX25L6445E Details

MX25L6445E General Description

General description of the MX25L6445E flash memory.

Flash Memory Device Operation

Explanation of the flash memory device operation modes.

Flash Memory Command Set

Command set table for flash memory operations.

Flash Memory Write Protection and Security

Details on write protection and security features.

Audio Amplifier TPA3110D2 Specifications

Chapter 9 Troubleshooting Guide

Monitor Display Issues (PC Mode)

Troubleshooting steps for no display in PC mode.

Composite Signal Display Problems

Troubleshooting steps for incorrect composite signal display.

Component Signal Display Problems

Troubleshooting steps for incorrect component signal display.

HDMI Signal Display Problems

Troubleshooting steps for incorrect HDMI signal display.

DC-DC Converter Troubleshooting

Troubleshooting steps for DC-DC converter voltage issues.

DDC Reading Troubleshooting

Troubleshooting steps for DDC reading communication failures.

TV Side Audio Issues

Troubleshooting steps for incorrect TV side audio output.

Chapter 10 System Block Diagrams

System Block Diagram Overview

Overall system block diagram of the TV.

Power Tree Diagram

Diagram showing the power distribution tree.

Chapter 11 Spare Parts List

Chapter 12-1 Complete Parts List

Chapter 12-2 Complete Parts List

MT5387 Component Schematics

DDR Memory Interface Schematics

Schematics for DDR memory interfaces and decoupling capacitors.

Audio Amplifier TPA3110D2 Schematics

Schematics for the TPA3110D2 audio amplifier.

T-CON IC Schematic

Schematic for the TL2344ML T-CON IC.

Disassembly Instructions

Rear Cover and Connector Board Removal

Instructions for removing the rear cover and connector board.

Power Board and Main Board Assembly Removal

Instructions for removing the power board and main board assemblies.

Disassembly Steps Summary

Summary of steps for disassembling rear cover, power board, and main board.

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