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LED TV
SERVICE MANUAL
CHASSIS : LD43B/LD44B
MODEL : 49LB55**
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL68003713 (1403-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
49LB552V
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
49LB55**-Z*
49LB552V-TB
Printed in Korea
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Summarization of Contents
Safety and Servicing Guidelines
General Safety Precautions
Essential safety notices, general guidance, and AC leakage current checks.
Servicing Precautions and ESD Handling
Guidelines for safe servicing, handling sensitive components, and soldering techniques.
Component Replacement and Board Repair
Procedures for replacing components and repairing circuit board foil.
Technical Specifications
Application Range, Test Requirements, and Methods
Defines the scope, test conditions, and methodology for specifications.
Model Specifications and Input/Output Systems
Details supported broadcasting systems, receiving systems, and ports.
Video Resolution Details (2D & 3D)
Supported resolutions for component, HDMI, RF, USB, and DLNA inputs.
Adjustment Procedures
Main PCB Check, Software Update, and EDID
Steps for PCB checks, USB software updates, and EDID data management.
Assembly Line Process and White Balance Adjustment
Procedures for total assembly line process including white balance calibration.
Functionality Testing and Component Checks
Tests for 3D function, IR emitter, MHL, and outgoing configuration.
Standard Repair Process
Video Error Troubleshooting Flowcharts
Step-by-step guides for diagnosing and fixing video-related issues.
Power Error Troubleshooting Flowcharts
Step-by-step guides for diagnosing and fixing power-related issues.
Audio Error Troubleshooting Flowcharts
Step-by-step guides for diagnosing and fixing audio-related issues.
Function, Noise, and Exterior Error Troubleshooting
Guides for resolving function, noise, and exterior defect issues.
Appendix: Component Exchange Visuals
T-Con, PSU/LED Driver, and Module Exchange Visuals
Visual examples of defects requiring T-Con, PSU, LED driver, or module replacement.
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