LG 24LQ520S User Manual

P/NO : MFL70446540 (2204-REV00)
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
Copyright © 2022 LG Electronics Inc. All rights reserved. Only training and service purposes.
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.
24LQ520S 24LQ520S-PU
24LQ520S-WU
LM22N
LED TV

LG 24LQ520S Specifications

General

Screen Size	24 inches
Display Type	LED
Resolution	1366 x 768
Smart TV	Yes
HDMI Ports	2
USB Ports	1
Audio Output	5W x 2
Weight	3.2 kg
Aspect Ratio	16:9
Refresh Rate	60 Hz
Operating System	webOS

Summary

Safety Precautions

General Safety Guidance

General safety rules, guidance on electrical hazards during servicing.

Leakage Current Testing

Procedures for performing cold and hot AC leakage current tests.

Servicing Precautions

General Servicing Guidelines

Rules for component handling, cleaning, and general servicing practices.

Electrostatic Discharge (ESD) Device Handling

Precautions for handling sensitive components to prevent damage.

Soldering Techniques

Guidelines for proper soldering and desoldering of components.

Product Specifications

Application Range and Test Method

Defines the scope of the manual and testing methodologies.

Electrical Specifications

Lists electrical parameters including broadcasting systems and input/output specs.

Features and Functions

Outlines the TV's features, remote control, and installation options.

External Input Formats

Specifies supported resolutions and frequencies for HDMI and PC inputs.

Software Update Procedure

USB Download Process

Step-by-step instructions for updating the TV's software via USB.

System Block Diagram

Exploded View

Troubleshooting Guide

Video Error Diagnosis

Guides for diagnosing and resolving video issues like no video or color problems.

Power Error Diagnosis

Guides for diagnosing and resolving power supply issues like no power or auto power off.

Audio Error Diagnosis

Guides for diagnosing and resolving audio issues like no sound or distorted audio.

Function Error Diagnosis

Guides for diagnosing issues with remote control, Wi-Fi, or external device recognition.

Noise Troubleshooting

Guides for identifying and resolving circuit or mechanical noise issues.

Exterior Defect Troubleshooting

Guides for addressing issues related to physical damage or defects on the TV.