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LG 22LS3700 User Manual

LG 22LS3700
40 pages
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Printed in KoreaP/NO : MFL67440118 (1202-REV00)
CHASSIS : LB21A
MODEL : 22LS3500 22LS3500-TB
MODEL : 22LS3700 22LS3700-TB
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 22LS3700 Specifications

General IconGeneral
Screen Size22 inches
Resolution1366 x 768
Display TypeLCD
BacklightLED
HDMI Ports2
USB Ports1
Aspect Ratio16:9
Refresh Rate60 Hz
InputsHDMI, USB, Component, Composite
Sound Output10W
Weight6.6 lbs

Summary

Safety Precautions

General Guidance

General safety advice for servicing the TV.

AC Leakage Current Checks

Procedures for checking AC leakage current (Cold and Hot checks).

Servicing Precautions

General Servicing Precautions

General safety procedures before, during, and after performing service.

Handling Sensitive Devices

Techniques to prevent damage to ES devices from static electricity.

Specification

Adjustment Instruction

PCB Check and USB Download

Procedures for checking the main PCB and downloading software via USB.

Software Update and ADC Process

Steps for software updates and Analog-to-Digital Converter (ADC) calibration.

EDID Data

Trouble Shooting

Power-up Boot Check

Diagnostic steps for power-up boot issues and component checks.

Video Signal Troubleshooting

Troubleshooting steps for digital and analog TV video signal issues.

HDMI Video Troubleshooting

Troubleshooting steps for HDMI video input signal problems.

All Source Audio Troubleshooting

Troubleshooting steps for audio issues across all input sources.

Audio Amplifier Schematic

LED Driver Circuit

Power Supply Circuits

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