LG 34GL750 User Manual

P/NO :
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL
P/NO : MFL70211518 (1904-REV00)
LED MONITOR
SERVICE MANUAL
LM71C
34GL750 34GL750-BB
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.

LG 34GL750 Specifications

General

Screen Size	34 inches
Resolution	2560 x 1080
Panel Type	IPS
Refresh Rate	144 Hz
Aspect Ratio	21:9
Brightness	300 cd/m²
Contrast Ratio	1000:1
Adaptive Sync	AMD FreeSync
HDR	HDR10
Color Gamut	sRGB 99%
VESA Mount	100 x 100 mm
Ports	2x HDMI, 1x DisplayPort
Viewing Angle	178° (H) / 178° (V)

Summary

Safety Precautions

Important Safety Notice

Key safety warnings and general guidance for servicing the monitor.

General Guidance

Provides advice on using isolation transformers and handling components during service.

AC Leakage Current Checks

Procedures for performing cold and hot checks of AC leakage current.

Specifications

General Specification

Details general specifications including model name, region, and features.

Signal Timing

Signal (Video & Sync)

Describes the video and sync signal parameters for monitor operation.

H/V Timing

Details horizontal and vertical timing specifications for various resolutions.

Block Diagram

Exploded View

Disassembly Procedures

Preparation and Tools

Lists necessary tools and preparation steps before disassembly.

Stand Assembly Separation

Instructions for detaching the monitor stand from the main unit.

Back Cover Disassembly

Steps for disassembling the monitor's back cover.

Component Removal

Steps for removing internal components like LED cables and PCBs.

Troubleshooting Guide

No Power Issues

Diagnostic steps and component checks for 'No Power' faults.

No Screen On Issues

Troubleshooting steps for cases where the screen remains blank.

No Video - HDMI

Diagnostic flow for issues related to HDMI input signal.

No Video - DisplayPort

Diagnostic flow for issues related to DisplayPort input signal.