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LG FLATRON 27UD68WG User Manual

LG FLATRON 27UD68WG
42 pages
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P/NO : MFL68962209(1511-REV00) Printed in China
COLOR MONITOR
SERVICE MANUAL
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS NO. : LM55H
MODEL:
27UD68
Internal Use Only
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LG FLATRON 27UD68WG Specifications

General IconGeneral
Colorsilver
Screen Typeled
Webcamno
OS Compatibilitywindows
Screen Size27 inches
Panel Typeips
Aspect Ratio16:9
Resolution3840 x 2160
Native Resolution3840 x 2160
Refresh Rate60hz
Horizontal Viewing Angle178 degrees
Vertical Viewing Angle178 degrees
Response Time5 milliseconds
Brightness350 candela per square meter
Contrast Ratio5, 000, 000:1
Synchronizationfreesync (amd adaptive sync)
HDRno
Built-In Speakersno
HDMI Ports2
Power Consumption29 watts
Depth with Stand7.3 inches
Width with Stand24.2 inches
Net Weight without Stand10.8 pounds

Summary

PRECAUTION

Monitor Safety Precautions

Guidelines for safe operation and handling, covering electrical safety and component protection.

LCD Module Handling Guidelines

Precautions for safely handling the LCD module to prevent physical damage and ensure user safety.

Electrical Shock and Leakage Current Safety

Warnings and procedures for electrical shock prevention, including leakage current testing methods.

SERVICING PRECAUTIONS

General Servicing Guidelines

Standard procedures for servicing, including power disconnection, cleaning, and test equipment usage.

ESD Protection Procedures

Methods to prevent damage to sensitive electronic components from static electricity during handling.

Safe Soldering Practices

Best practices for soldering and unsoldering components to ensure circuit integrity and part longevity.

Component Replacement Steps

Detailed instructions for replacing ICs, transistors, diodes, fuses, and resistors.

Circuit Board Trace Repair

Techniques for repairing damaged copper traces on circuit boards using jumper wires.

General Specifications

Mechanical Specifications

Optical Characteristics

Engineering Specifications

LCD Module Specifications

Display Area and Bezel Dimensions

Defines the active display area and its relation to the monitor bezel for accurate placement.

Signal Timing Charts

DisplayPort Signal Timing Details

Detailed timing parameters for DisplayPort video and sync signals, crucial for signal integrity.

HDMI Signal Timing Details

Detailed timing parameters for HDMI video and sync signals, crucial for signal integrity.

Adjustment Procedures

Adjustment Application and Designation

Defines the scope of the document and identifies the product for adjustment procedures.

Main PCB Check Process

Steps for checking the main PCB, including ADC, function tests, and interface checks.

Assembly Line HDCP Key Writing

Procedures for writing HDCP keys into EEPROM during the assembly line process.

White Balance and Factory Calibration

Steps for performing white balance checks and factory calibration for optimal display performance.

DPM Operation Verification

Procedure to verify the Dynamic Power Management (DPM) operation according to specified conditions.

Service Menu and Shipping Conditions

Information on accessing the service menu and details on final product shipping conditions.

Signal Adjustment Communication

I2C Communication and Command Protocol

Details on I2C communication, commands, and sequences required for product adjustment.

Main System Block Diagram

Product Troubleshooting Guide

Troubleshooting No Power Issues

Diagnostic steps and checks for identifying and resolving power-related issues in the monitor.

Troubleshooting No Raster or OSD

Diagnostic steps for issues where no image or On-Screen Display (OSD) is displayed.

Troubleshooting DPM Issues

Steps to diagnose and resolve problems related to Dynamic Power Management (DPM) functionality.

Exploded View and Parts Identification

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