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LCD TV
SERVICE MANUAL
CHASSIS : LD91B
MODEL : 37H5000
MODEL :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL61862202 (0904-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
37H5010
37H5020
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
37LH5000-ZB
37LH5010-ZD
37LH5020-ZE
Printed in Korea
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Summarization of Contents
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
Covers critical safety notices for servicing.
General Guidance
Provides essential safety practices for technicians.
Leakage Current Hot Check
Details the procedure for checking AC leakage current.
SERVICING PRECAUTIONS
General Servicing Precautions
Outlines essential safety measures for all servicing tasks.
Electrostatically Sensitive (ES) Devices
Explains handling precautions for sensitive electronic components.
General Soldering Guidelines
Provides best practices for soldering electronic components.
IC Remove/Replacement
Details the method for removing and installing ICs.
Circuit Board Foil Repair
Describes techniques for repairing damaged printed circuit board traces.
SPECIFICATION
4. Electrical specification
Lists the technical electrical characteristics of the LCD TV.
5. Chroma& Brightness
Details the display's color and brightness specifications.
6. Component Video Input (Y, CB/PB, CR/PR)
Specifies input parameters for component video signals.
7. RGB (PC)
Lists supported RGB input resolutions and timings.
8. HDMI Input (PC/DTV)
Details supported HDMI input formats and resolutions.
ADJUSTMENT INSTRUCTION
3. Main PCB check process
Outlines the procedure for checking the main PCB.
3.1. ADC Process
Details the analog-to-digital converter adjustment steps.
3.2. Function Check
Describes how to verify basic TV functions after adjustment.
4.1. Adjustment Preparation
Details the necessary setup and equipment for adjustments.
4.2. DDC EDID Write (RGB 128Byte)
Procedure for writing EDID data for RGB input.
4.3. DDC EDID Write (HDMI 256Byte)
Procedure for writing EDID data for HDMI input.
Auto Download
Explains the automatic firmware download process.
Manual Download
Explains the manual firmware download process.
5. Serial number D/L
Process for downloading serial numbers into the TV.
BLOCK DIAGRAM
BLOCK DIAGRAM
Visual representation of the TV's internal components and connections.
EXPLODED VIEW
EXPLODED VIEW
Diagram showing the physical layout of TV components for assembly/disassembly.
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