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LG 43LJ5000-UB User Manual

LG 43LJ5000-UB
40 pages
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P/NO : MFL69920605 (1612-REV00)
CHASSIS : MS3553.PB765
MODEL : 43LJ5000-UB
43LJ500M-UB
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED TV
SERVICE MANUAL
Internal Use Only
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LG 43LJ5000-UB Specifications

General IconGeneral
BrandLG
Model43LJ5000-UB
CategoryLED TV
LanguageEnglish

Summary

Safety Precautions

Servicing Precautions

General Servicing Guidelines

General guidelines for safe and effective servicing of the TV.

Handling Electrostatic Sensitive Devices

Techniques to prevent damage to sensitive electronic components from static electricity.

Soldering Best Practices

Best practices for soldering components, including temperature and tip maintenance.

IC Removal and Replacement

Procedures for removing and installing integrated circuits on circuit boards.

Small Signal Transistor Replacement

Steps for replacing small signal transistors, including lead preparation.

Power Transistor Replacement

Guide for removing and replacing power transistors and heat sinks.

Diode Replacement Procedure

Method for replacing diodes, ensuring correct polarity and connection.

Fuse and Resistor Replacement

Instructions for replacing fuses and resistors, maintaining spacing.

Circuit Board Trace Repair

Techniques for repairing damaged copper traces on printed circuit boards.

Specification

Application Scope

Specifies the LED TV models covered by this service manual.

Testing Requirements

Details the environmental and power conditions for testing components.

Testing Methodology

Outlines the procedures and standards for evaluating TV performance.

General Model Specifications

Lists general specifications for the TV models including inputs and resolutions.

Component Video Input Specifications

Specifies supported resolutions and frequencies for component video inputs.

HDMI Input Specifications

Lists resolutions and frequencies supported via HDMI connections.

Software Update Procedure

Software Update via USB

Step-by-step guide for updating the TV software using a USB drive.

Software Update via AC ON

Procedure for updating software via AC power cycle.

Block Diagram

System Function Block Diagram

Visual representation of the TV's main system components and their interconnections.

Mainboard Power Tree Diagram

Diagram illustrating the power distribution and voltage rails on the mainboard.

Exploded View

Exploded View Safety Notice

Crucial safety information related to specific parts identified in the exploded view.

Disassemble

Initial Disassembly and Module Removal

Step-by-step guide for initial disassembly, focusing on screw removal.

Connector Removal

Instructions for disconnecting all internal connectors from the mainboard and other modules.

Power Core, IO Cover, and Tape Removal

Steps to remove the power supply components, I/O covers, and adhesive tape.

Mainboard and Tape Screw Removal

Details on removing screws securing the mainboard and associated tapes.

Accessory Tape Removal

Specific instructions for removing various types of tape used in the assembly.

Speaker, Bracket, and Screw Removal

Steps to detach speakers, mounting brackets, and screws.

IR Cover and Tape Removal

Guide to removing the infrared sensor cover and any attached tape.

A1 Power Supply Trouble

A2-1 Display Trouble

A2-2 Display Trouble

A2-3 Display Trouble

A2-4 Display Trouble

A3 Audio Trouble

A4-1 Function error (TV video)

A4-2 Function error (HDMI, YPbPr, CVBS)

A5 Power circuit diagram

A6 Power supply Trouble 2

A7 Power supply for LED drive

Adjustment Instruction

Factory Main Menu Options

Main menu for accessing factory settings and adjustments.

LG System Information Display

Displays system parameters, not adjustable items.

LG EZ Adjustment Settings

Adjusts area options and white balance.

Factory Initialization Guide

Guide for operating the factory initialization process.

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