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LED LCD TV
SERVICE MANUAL
CHASSIS : LD23E
MODEL : 55LM860V/W
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67361003 (1207-REV01)
North/Latin America
Europe/Africa
Asia/Oceania
55LM860V/W-ZB
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 55LM860W
Summarization of Contents
SAFETY PRECAUTIONS
General Guidance
Provides essential safety advice for servicing electronic equipment.
Leakage Current Cold Check
Method to check AC leakage current with the chassis unplugged.
Leakage Current Hot Check
Procedure to measure AC leakage current with the set powered on.
SERVICING PRECAUTIONS
General Servicing Precautions
Essential safety guidelines for handling electronic components and assemblies.
Electrostatically Sensitive (ES) Devices
Techniques to prevent damage to sensitive electronic components from static electricity.
General Soldering Guidelines
Recommended practices for soldering electronic components safely and effectively.
Component Replacement Procedures
IC and Transistor Replacement
Methods for removing and replacing integrated circuits and discrete transistors.
Diode, Fuse, and Resistor Replacement
Procedures for replacing diodes, fuses, and conventional resistors.
Circuit Board Foil Repair
Guidelines for repairing damaged copper patterns on printed circuit boards.
SPECIFICATION
Application Range & Test Requirements
Details the applicable chassis and testing conditions for the product.
Test Methods
Outlines the procedures for performance and safety testing.
Model General Specifications
Provides general specifications including market, broadcasting systems, and input voltage.
Input Signal Specifications
Component Video Input
Specifications for component video input signals (Y, Cb/Pb, Cr/Pr).
RGB Input (PC)
Specifications for RGB input signals from personal computers.
Connectivity and Signal Interfaces
HDMI Input Specifications
Details supported resolutions and timing for HDMI PC and DTV inputs.
3D Mode Specifications
Specifications for RF and HDMI input modes for 3D display.
Manual Adjustment Procedures
EDID/DDC and White Balance Adjustment
Procedures for EDID/DDC download and White Balance calibration.
Functionality & Remote Control Tests
Tests for EYE-Q, Local Dimming, Magic Motion Remote, 3D, and Wi-Fi.
Configuration & Download Procedures
Steps for option selection, MHL test, tool options, and USB S/W download.
Schematic Diagrams
System Configuration & Processors
Diagrams for system setup, main processors (LG1152), and memory interfaces.
Power Supply Schematics
Schematics detailing power supply circuits and voltage regulators.
Interface Schematics
Diagrams for HDMI, USB, Wi-Fi, Ethernet, Audio, Tuner, MICOM, and other interfaces.
Display Signal Path Schematics
Schematics showing LVDS, T-CON, PMIC, GAMMA, and GPM signal paths.
Standard Repair Process
A. Video Error Troubleshooting
Step-by-step guide for diagnosing and resolving video-related issues.
B. Power Error Troubleshooting
Troubleshooting steps for power-related issues like no power or intermittent power.
C. Audio Error Troubleshooting
Diagnostic procedures for audio problems like no audio or distorted sound.
D. Function Error Troubleshooting
Steps for diagnosing remote control, M4, Wi-Fi, and external device recognition errors.
E. Noise Troubleshooting
Guidance for identifying and resolving circuit noise or mechanical noise.
F. Exterior Defect Resolution
Procedures for addressing physical damage or exterior defects.
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