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LED TV
SERVICE MANUAL
CHASSIS : LD46B
MODEL : 47LB57**
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL68059709 (1402-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
47LB57**-Z*
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea
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Summarization of Contents
Safety Precautions
Important Safety Notices
Crucial warnings for safe handling and servicing.
Servicing Safety Procedures
Guidelines for safe electrical and component handling during service.
Servicing Precautions
General Servicing Guidelines
Standard practices for safe maintenance and repair.
Component Handling Precautions
Safe practices for handling ES devices and soldering.
Component Replacement Procedures
Procedures for replacing ICs, transistors, diodes, fuses, and repairing PCB foil.
Specifications
General Specifications
Application range, test requirements, and model details.
Input and Signal Specifications
Details on HDMI input, component video, and broadcast reception.
Adjustment Instructions
General Adjustment Guidelines
Conditions, designations, and LAN inspection for adjustments.
Key Adjustment Procedures
Steps for Wi-Fi MAC check, EDID data, and CI+ key checks.
White Balance Adjustment
Methodology, equipment, and commands for White Balance adjustment.
Service Specific Adjustments
Procedures for Wi-Fi test, LNB check, GND/Pressure check, and USB S/W Download.
Diagrams
Block Diagram
Overall system architecture and component connections.
Exploded View
Visual breakdown of the TV's physical components.
Standard Repair Process
Troubleshooting Overview
Contents of common LCD TV error symptoms and their resolution pages.
Video Error Troubleshooting
Diagnostic flowcharts for no video, picture problems, and color errors.
Power and Audio Error Troubleshooting
Flowcharts for power issues (no power, auto on/off) and audio problems.
Function and Other Error Troubleshooting
Troubleshooting for remote control, network, CI+ errors, and noise.
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