LG 55LW9500 User Manual

LED LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LB12D
MODEL : 55LW9500 55LW9500-TA
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 : MFL67007005 (1104-REV00)

LG 55LW9500 Specifications

General

Screen Size	55 inches
Resolution	1920 x 1080
Display Type	LCD
Backlight	LED
3D Support	Yes
Smart TV	Yes
HDMI Ports	4
USB Ports	2
Audio Output	20W
Refresh Rate	240Hz
Built-in Wi-Fi	Yes
3D Technology	Passive

Summary

LED LCD TV Service Manual

Safety Precautions

Important safety notice before servicing the chassis.

Safety Precautions

Important Safety Notice

Key safety warnings and guidance for servicing.

Leakage Current Cold Check

Leakage Current Hot Check

Adjustment Instruction

Automatic Adjustment

Procedures for automatic adjustments.

Manual Adjustment

ADC Adjustment

Detailed steps for ADC adjustment.

EDID(The Extended Display Identification Data)/DDC(Display Data Channel) download

White Balance Adjustment

Procedure for adjusting white balance.

Audio

USB S/W download(Service only)

Instructions for downloading software via USB.

Exploded View

IMPORTANT SAFETY NOTICE

Crucial safety information related to the exploded view.

3D Encoding Format

3D Format Processing

Diagram showing the 3D signal processing flow.

3DTV System

3D with Active glasses

Repair Guide for BCM Chassis

Tool Option Information

Main PCB for Broadband

Description of the main PCB for broadband functionality.

Formatter PCB for BroadBand

Repair Process (Troubleshooting)

Steps for repair and troubleshooting.

Tool Option Information

Main PCB for Broadband

Main Board (LW9500 & LW7700)

Main Board (LW6500 & LW5700)

Formatter PCB for Broadband

Main Features & Cables (LW9500 & LW7700)

Appendix: Block Diagram for Edge/ALEF Backlight

Contents of LCD TV Standard Repair Process

B. Power error

Standard Repair Process

A. Video error: No video/ Normal audio

Troubleshooting steps for no video or normal audio issues.

A. Video error: No video/ No audio

Troubleshooting steps for no video or no audio issues.

A. Picture Problem: Picture broken/ Freezing

Troubleshooting steps for picture issues like freezing.

A. Picture Problem (DVB-S/S2)

A. Video error: Color error

Troubleshooting steps for color errors.

A. Video error: Vertical/Horizontal bar, residual image, light spot

Troubleshooting for bars, residual image, or light spots.

B. Power error: No power

Troubleshooting steps for no power issues.

B. Power error: Off when on, off while viewing, power auto on/off

Troubleshooting for power issues during operation.

C. Audio error: No audio/Normal video

C. Audio error: Wrecked audio/ discontinuation/noise

D. General Function Problem: Remote control & Local switch checking

D. Function error: External device recognition error

E. Noise: Circuit noise, mechanical noise

Contents of LCD TV Standard Repair Process Detail Technical Manual

<Appendix> Defected Type caused by T-Con/ Inverter/ Module

Standard Repair Process Detail Technical Manual

A. Video error_No video/Normal audio

Checking White Balance value via adjustment menu.

A. Video error_No video/ Audio

Measuring Power Board output voltages.

A. Video error _Vertical/Horizontal bar, residual image, light spot

A. Video error_Video error, video lag/stop

A. Video error_Color error

Appendix : Exchange T-Con Board (1)

Appendix : Exchange T-Con Board (2)

Appendix : Exchange PSU(LED driver)

Appendix : Exchange the Module (1)

Appendix : Exchange the Module (2)

B. Power error_No power

B. Power error _No power

B. Power error _Off when on, off while viewing

C. Audio error_No audio/Normal video

D. General Function Problem: Remote control & Local switch checking

D. VCOM Adjustment