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LG 27UL500 User Manual

LG 27UL500
34 pages
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Internal Use Only
P/NO :
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
MFL62449372 (1901-REV00)
27UL500
LM8CA
LED LCD MONITOR
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LG 27UL500 Specifications

General IconGeneral
3D-
Pixel pitch0.1554 x 0.1554 mm
Screen shapeFlat
Display surfaceMatt
Display diagonal27 \
Display technologyLED
Native aspect ratio16:9
Maximum refresh rate- Hz
sRGB coverage (typical)98 %
Contrast ratio (typical)1000:1
Display number of colors1.073 billion colors
Display brightness (typical)300 cd/m²
Supported graphics resolutions3840 x 2160
High Dynamic Range (HDR) supportedYes
Cables includedDisplayPort, HDMI
Package typeBox
Package depth146 mm
Package width700 mm
Package height446 mm
Package weight7100 g
Panel mounting interface100 x 100 mm
AC input voltage100 - 240 V
AC input frequency50 - 60 Hz
Energy efficiency scaleA to G
Power consumption (off)0.3 W
Power consumption (standby)0.5 W
Power consumption (PowerSave)- W
Product colorSilver
Market positioningGaming
DisplayPort version1.4
VGA (D-Sub) ports quantity0
Weight and Dimensions IconWeight and Dimensions
Depth (with stand)209.4 mm
Height (with stand)460 mm
Weight (with stand)5100 g
Depth (without stand)74.1 mm
Width (without stand)622.6 mm
Height (without stand)371 mm
Weight (without stand)4600 g

Summary

SAFETY PRECAUTIONS

General Guidance

General safety guidelines for servicing the monitor, preventing electrical shock.

Leakage Current Hot Check

Procedure for measuring AC leakage current to ensure user safety.

Leakage Current Cold Check

Method for checking continuity of exposed metallic parts to chassis.

SPECIFICATION

General Specification

Detailed specifications for the monitor's general features and connectivity.

Signal Timing (Resolution)

Display Port Signal Timing

Timing parameters for various resolutions via DisplayPort.

HDMI Signal Timing

Timing parameters for various resolutions via HDMI.

LCD Panel Characteristic

EDID Information

Details of Extended Display Identification Data (EDID) for the monitor.

ADJUSTMENT INSTRUCTION

Application and Designation

Scope of the manual and designation of adjustment procedures.

Main PCB Check Process

Steps for checking the Main PCB, including SMT and function tests.

Write HDCP Key

Procedure for writing HDCP 2.2 and 1.4 keys into flash memory.

Total Assembly Line Process

EDID Serial Number Write

Process for writing the serial number into EDID data.

Verify HDCP Key

Method to verify HDCP key functionality by checking screen color.

Set Automatic Standby time

Instructions for setting and checking automatic standby time.

Factory Calibration

Procedures for factory calibration including Gamma and Color Temperature.

White Balance and HDR Check

White Balance Check

Procedure to check white balance specifications before factory calibration.

HDR Check

Steps to check HDR mode functionality and OSD display.

DPM Operation Check

Procedure to check DisplayPort Monitor (DPM) operation.

Shipping Condition

Factory Reset and Outgoing Settings

Steps for factory reset and configuring outgoing settings.

Signal Composition for Adjustment

I2C Communication and Commands

Details on I2C communication, start commands, and command forms.

Screen Adjust Commands

Hexadecimal commands for screen adjustments like gain, brightness, and color mode.

EEPROM and EDID Operations

EEPROM Data Write

Commands for writing data to EEPROM, including signal table and command set.

EPROM Data Read

Commands for reading data from EEPROM, including signal table and command set.

BLOCK DIAGRAM

System Overview

Schematic showing the main components and their interconnections.

EXPLODED VIEW

Component Identification

Visual representation of components and their assembly order.

ASSEMBLE AND DISASSEMBLE

Tools Required for Disassembly

List of tools needed for product disassembly.

Product Disassembly Process

Basic steps and guidelines for disassembling the product.

TROUBLE SHOOTING GUIDE

No Power Troubleshooting

Flowchart for diagnosing and resolving power-related issues.

No Screen Troubleshooting

Flowchart for diagnosing and resolving screen display issues.

No Video - HDMI Troubleshooting

Troubleshooting steps for no video signal via HDMI.

No Video - DP Troubleshooting

Troubleshooting steps for no video signal via DisplayPort.

No Sound (H/P) Troubleshooting

Troubleshooting steps for no audio output.

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