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LCD TV
SERVICE MANUAL
CHASSIS : LD03B
MODEL : 42LD650/680
MODEL :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL63263110 (1003-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
42LD650N/690
42LD651/690
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
42LD650/680-ZC
42LD650N/690-ZC
42LD651/690-ZB
Printed in Korea
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Summarization of Contents
Safety Precautions
Important Safety Notice
Provides essential safety notices and warnings for servicing the equipment.
General Guidance
Offers general advice for safe handling and servicing practices.
Leakage Current Checks
Details cold and hot leakage current testing procedures for safety assurance.
Specifications
Application Range
Defines the LCD TV models and chassis covered by these specifications.
Test Requirements
Lists environmental conditions and power requirements for product testing.
Test Methods
Outlines the methodologies used for various product performance tests.
Module Optical Specifications
Details the optical performance parameters of the display module.
Component Video Input
Specifies input resolutions and frequencies for component video signals.
RGB (PC) Input
Lists PC input resolutions, frequencies, and pixel clocks supported.
HDMI Input
Details supported DTV and PC modes for HDMI input signals.
Adjustment Instructions
Application Range
Specifies which LCD TV models these adjustment instructions apply to.
Designation
Outlines conditions, order, and general guidance for performing adjustments.
Automatic Adjustment
Covers procedures for automatic adjustment of TV parameters.
LAN Connectivity
Details LAN setup, inspection, and V-COM adjustment procedures.
V-COM Adjustment
Explains how to adjust the V-COM voltage for optimal panel performance.
Model and Serial Number Download
Guides on downloading model name and serial number via service interface.
CI+ Key Download
Describes the process for downloading CI+ keys using RS-232C communication.
Manual Adjustment Procedures
ADC Adjustment
Details ADC calibration to optimize black level and RGB gain.
EDID/DDC Download
Explains EDID/DDC data download for PC and display compatibility.
White Balance Adjustment
Guides on adjusting white balance for accurate color reproduction.
White Balance Adjustment Method
Describes auto and manual methods for white balance adjustment.
Eye-Q Function Check
Details how to perform and check the Eye-Q sensor calibration.
Tool Option Selection
Explains how to select specific tool options for various adjustments.
Ship-out Mode Check
Outlines the procedure for checking the unit's state before shipping.
Service Checks and Downloads
GND and Internal Pressure Check
Outlines procedures for checking GND and internal pressure safety.
Audio Specifications
Provides details on audio output power and impedance measurements.
USB S/W Download
Explains the process for downloading firmware and software via USB.
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