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LED LCD TV
SERVICE MANUAL
CHASSIS : LB22E
MODEL : 55LS5700
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67441802 (1202-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
55LS570Y
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
55LS5700-TB
55LS570Y-TB
Printed in Korea
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Summarization of Contents
Safety and Servicing Precautions
General Safety Notices
Important safety notices for servicing the chassis.
Servicing Best Practices
General guidelines for safe servicing, ES device handling, and soldering.
AC Leakage Current Checks
Procedures to check AC leakage current with the set powered on.
TV Specifications and Adjustments
TV Model Specifications
General specifications for different models and regions.
Adjustment Instructions
Procedures for TV adjustment, calibration, and firmware updates.
White Balance and ADC Calibration
Steps for White Balance and ADC calibration using remote and software.
Data Management and System Testing
DDC EDID Write Procedures
Procedures to write EDID data for RGB and HDMI connections.
Functional Test Procedures
Procedures for testing 3D, Wi-Fi, and remote control functions.
Assembly and System Overview
Screw Assembly Guide
Specifications and application of screws used in assembly.
System Block Diagram
Overall block diagram of the TV's internal components.
Exploded View Diagram
Diagram showing disassembled parts of the TV.
Standard Repair Process
Video Error Troubleshooting
Troubleshooting steps for various video issues.
Power Error Troubleshooting
Troubleshooting steps for power-related errors.
Audio Error Troubleshooting
Troubleshooting steps for audio-related errors.
Function Error Troubleshooting
Troubleshooting remote control and external device errors.
Noise and Exterior Defects
Troubleshooting steps for noise and exterior physical defects.
Detailed Repair Procedures
Video Error Specific Checks
Detailed checks for video errors like white balance, signal strength, and input.
Power Error Specific Checks
Detailed checks for power errors like LED status, voltage, and power modes.
Audio Error Specific Checks
Detailed checks for audio errors like menu settings, speaker voltage, and signal.
Function and Adjustment Procedures
Procedures for remote control checks and VCOM adjustment.
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