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LED TV
SERVICE MANUAL
CHASSIS : LD59R / LD5ZR
MODEL : 43/49UF640*
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69305903 (1506-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
43/49UF640*-ZA
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea
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Table of Contents
Related Manuals for LG 43UF640 -ZA Series
Summarization of Contents
Safety Precautions
Important Safety Notice
Critical safety information for servicing, covering shock and fire hazards.
General Guidance for Servicing
Provides general advice for safe servicing operations and component handling.
Leakage Current Checks
Procedures for checking AC leakage current (cold and hot) to ensure user safety.
Servicing Precautions
General Servicing Precautions
Basic rules for unplugging, testing, cleaning, and handling components safely.
Electrostatically Sensitive (ES) Devices Handling
Guidelines for handling sensitive components to prevent static discharge damage.
General Soldering Guidelines
Best practices for soldering, including temperature, solder type, and technique.
Specifications
Application Range
Defines the TV models and chassis this specification applies to.
Requirements for Testing
Specifies environmental and power conditions for product testing.
Model General Specifications
Lists general specifications by market, including supported TV standards.
External Input Format
Standard Input Signal Levels
Specifies voltage levels for various video and audio input signals.
2D Mode Input Specifications
Details input resolutions, frequencies, and pixel clocks for different modes.
Adjustment Instruction
Application Range
Specifies the LED TV models and chassis covered by this instruction.
Designation
General notes on chassis isolation, adjustment order, and environmental conditions.
MAC/CI+/Widevine/ESN/HDCP2.0 Data Download
Procedure for downloading essential data like MAC addresses and keys.
LAN Inspection
Steps for checking network connectivity and settings via LAN.
Model Name & Serial Number Download
Process for downloading model name and serial number information.
WIFI MAC Address Check
Procedure to check the WIFI MAC address using RS232C command.
Manual Adjustment
EDID/DDC Download Procedure
Explanation of EDID/DDC and the process for downloading this data.
EDID DATA Reference
Details on EDID data fields like Product ID, Serial No., Model Name, and Checksum.
Green Eye Inspection Guide
Steps to inspect the Intelligent Sensor module and backlight values.
V-COM Adjust
V-COM Adjust Overview & How-it-works
Objective and method to reduce panel V-COM voltage deviation and prevent flicker.
V-COM Adjust Data
Provides hex and decimal data values for V-COM adjustment for different screen sizes.
White Balance Adjustment
White Balance Overview & How-it-works
Objective and method to reduce panel W/B deviation using R/G/B gain adjustments.
White Balance Equipment
Lists necessary equipment for white balance adjustment, including color analyzer and computer.
White Balance Reference Data
Provides reference coordinates and color temperature for white balance.
GND and Internal Pressure Check
GND and Internal Pressure Check Method
Steps for performing auto-checks for GND and internal pressure.
GND and Internal Pressure Checkpoint
Specifies test voltages and times for GND and internal pressure checks.
Block Diagram
LM14A(+URSA11) Block Diagram
High-level block diagram showing major components and their interconnections.
Exploded View
Important Safety Notice
Critical safety warnings related to parts identified with a symbol in the diagram.
Standard Repair Process: Video Error Troubleshooting
No Video or Normal Audio
Troubleshooting steps for no video or normal audio issues.
No Video or No Audio
Troubleshooting steps for no video and no audio issues.
Picture Broken or Freezing
Troubleshooting steps for picture breaking or freezing issues.
Color Error
Troubleshooting steps for color-related display problems.
Vertical/Horizontal Bars, Residual Image, Light Spot
Troubleshooting for display artifacts like bars, residual images, or light spots.
External Device Screen/Color Error
Troubleshooting for errors related to external device input and color display.
Standard Repair Process: Power Error Troubleshooting
No Power
Troubleshooting steps for the TV not turning on or no power indicator.
Power Off During Operation
Troubleshooting for the TV turning off unexpectedly during use.
Standard Repair Process: Audio Error Troubleshooting
No Audio or Normal Video
Troubleshooting steps when there is no audio but video is normal.
Wrecked Audio, Discontinuation, or Noise
Troubleshooting for distorted, interrupted, or noisy audio issues.
Standard Repair Process: Function Error Troubleshooting
Remote Control Operation Error
Steps to diagnose and fix issues with the remote control's operation.
MR15 (Magic Remote) Operation Error
Troubleshooting steps for the MR15 magic remote control.
Wifi Operating Error
Steps to diagnose and fix issues with the TV's Wi-Fi functionality.
Camera Operating Error
Troubleshooting steps for camera function errors.
External Device Recognition Error
Steps to diagnose issues when external devices are not recognized.
Standard Repair Process: Noise Troubleshooting
Circuit Noise and Mechanical Noise
Troubleshooting procedures for identifying and resolving circuit or mechanical noise.
Standard Repair Process: Exterior Defect Troubleshooting
Exterior Defect Types
Guide to identifying and addressing external physical damage to the TV.
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