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LED LCD TV
SERVICE MANUAL
CHASSIS : LD03E
MODEL: 55LE7500/750N
MODEL:
MODEL:
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL62863017 (1005-REV00)
55LE7800/7900
55LE7510/7910
P
OK
MENU
INPUT
North/Latin America
Europe/Africa
Asia/Oceania
55LE7500/750N-ZA
55LE7800/7900-ZA
55LE7510/7910-ZB
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 Notice
Critical safety warnings for servicing, including special part replacements and design modifications.
General Guidance for Servicing
Guidelines for using isolation transformers, handling fuses, and keeping wires away from hot parts.
AC Leakage Current Cold Check
Procedure to check AC leakage current with the AC plug removed from the source.
AC Leakage Current Hot Check
Procedure to check AC leakage current with the AC plug directly connected to the outlet.
Specifications
Specification Application Range
Defines the scope of the specification for the LD03E chassis LCD TV.
Test Requirements
Specifies the conditions and voltage for testing each part of the TV.
Testing Methodology
Outlines the methods for performance and safety testing based on LGE standards.
General Module Specifications
Details general technical specifications for the LCD module and its operation.
Module Optical Specifications
Provides optical characteristics like viewing angle, luminance, and contrast ratio.
Component Video Input Specifications
Lists supported resolutions, horizontal, and vertical frequencies for component input.
RGB PC Input Specifications
Details supported resolutions, frequencies, and pixel clocks for PC input via RGB.
HDMI Input Specifications
Specifies supported resolutions, frequencies, and pixel clocks for HDMI input.
Adjustment Instruction
Adjustment Application Range
Defines the scope of adjustments for LCD TVs using the LD03E chassis.
Designation and Conditions
Specifies designation, order of adjustment, temperature, humidity, and voltage conditions.
Automatic Adjustment Procedures
Outlines the general process and need for automatic adjustments.
ADC Adjustment Procedure
Details the ADC adjustment for optimum black level and RGB deviation compensation.
MAC Address Download
Procedure for downloading MAC addresses using the service software.
LAN Port Inspection (Ping Test)
Instructions for inspecting LAN port functionality using a ping test program.
V-COM Adjustment
Explanation and procedure for adjusting V-COM, the reference voltage for liquid crystal driving.
Model Name and Serial Number Download
Procedure for downloading model name and serial number via service tools.
CI+ Key Download Method
Instructions for downloading CI+ keys using RS-232C communication.
Manual Adjustment Procedures
General steps for performing manual adjustments on the TV.
ADC(GP2) Adjustment Procedure
Detailed steps for ADC calibration using specific patterns and methods.
EDID/DDC Download
Procedure for downloading EDID data for optimal PC resolution sharing.
White Balance Adjustment Procedure
Steps and objective for adjusting white balance to reduce panel deviation.
Eye-Q Function Check
Procedure to check the Eye-Q sensor functionality and calibration.
Local Dimming Function Check
Procedure to check the functionality of the local dimming feature.
Country Option Selection
Instructions for selecting country-specific options for models not in the EU.
GND and Internal Pressure Check
Procedures for checking ground and internal pressure for safety compliance.
Audio Specifications
Details on audio output power, impedance, and measurement conditions.
USB Software Download
Instructions for downloading software updates via USB.
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