LG 75UL3J-E - User Manual

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USER GUIDE

LG Digital Signage

(MONITOR SIGNAGE)

www.lg.com

webOS 6.0

Please read the user manual before using this product to ensure safe and

convenient use.

Main Page

Questions and Answers

J
Jesse SampsonAug 25, 2025
What to do if touch does not respond on LG Digital Signage?
- I
  Isaac ReedAug 26, 2025
  If the touch function does not respond on your LG Digital Signage, remove the USB cable and reconnect it after 10 seconds. Ensure your PC’s power cord is firmly plugged into a power outlet and restart your PC. If the system is down due to an unstable network, reconnect the LAN cable or restart your PC. Check the signal cable connection between your PC and the product, and make sure the product is powered on. Always connect the power cord to a grounded outlet to avoid breaks or touch errors. Also, check if the screen is currently on.
J
Joseph RobinsonAug 23, 2025
Why is the screen brightness dark on my LG 75UL3J-E Digital Signage?
- R
  Rachel MartinezAug 23, 2025
  If the screen’s brightness seems dark on your LG Digital Signage, try adjusting the brightness and contrast settings. If this doesn't help, the backlight may need repair. Also, if the internal temperature of the enclosure rises, the screen’s brightness may darken, so clean the heat exchanger or filter in the enclosure periodically.

Summary

SAFETY PRECAUTIONS

AC Adapter and Power Precautions

Safety guidelines for using the AC adapter and power cord to prevent hazards.

Moving Product Safety

Instructions and warnings related to safely moving the display unit.

Product Installation Safety

Guidelines for proper and safe installation of the product to prevent damage or injury.

Product Cleaning Safety

Recommended methods for cleaning the product safely to avoid damage or electrical shock.

General Product Usage Safety

Essential safety measures and warnings for the general operation of the product.

Remote Control Usage Safety

Safety advice for handling and using the remote control, including battery precautions.

Image Retention Precautions

Advice on preventing image retention and screen damage from static images.

Product Disposal Guidelines

Guidelines for the proper and environmentally responsible disposal of the product.

USING THE REMOTE CONTROL

Remote Control Operation Guide

Explanation of how to use the remote control, including battery installation.

MAKING CONNECTIONS

PC Connection Guide

Instructions on how to connect the monitor to a PC via USB or USB-C.

External Device Connectivity

Guidance on connecting external devices like HD receivers, DVDs, or VCRs.

Multi-Monitor Setup

Steps and methods for connecting multiple monitors in a daisy-chain configuration.

SETTINGS & CONFIGURATION

Home Screen Configuration

Overview of the Home screen and its main functions like Global Buttons and Dashboard.

Ez Setting Options

Detailed explanation of various configuration options within the Ez Setting menu.

General System Settings

Configuration options related to language, system info, Set ID, and time settings.

Content Management System

Features for managing and playing content, including player, continuous play, and export options.

Management Tools Overview

Tools for controlling the display and managing Picture ID settings.

EXTERNAL PC CONTROL VIA TOUCH SCREEN

PC Connectivity for Touch Control

Connecting a PC via USB or USB-C for touch screen control of the product.

Touch Screen Task Priority

Understanding the prioritized tasks performed when touching the screen with a PC connected.

SMART CALIBRATION

Smart Calibration Guide

Step-by-step guide to executing smart calibration for color and brightness adjustment.

IR CODE REFERENCE

Remote Control IR Codes

Table listing IR codes for various remote control functions and their hex values.

CONTROLLING MULTIPLE PRODUCTS

Multi-Product Connection Cables

Instructions and diagrams for connecting multiple products using RS-232C cables.

LG 75UL3J-E Specifications

General

Display Size	75 inches
Resolution	3840 x 2160 (UHD)
Panel Type	IPS
Aspect Ratio	16:9
Viewing Angle (H x V)	178° x 178°
Response Time	8 ms (G to G)
Operating System	webOS
Contrast Ratio	1200:1
Connectivity	HDMI, USB, RS232C, RJ45
Bezel Width	11.9mm
Color Gamut	72%