LG 55SM5KD - User Manual

P/NO :
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
SERVICE MANUAL
Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONFIDENTIAL
MFL67261247 (1706-REV00)
55SM5KD 55SM5KD-BH
LW79A
LG Digital Signage
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 55SM5KD Specifications

General

Panel life	- h
Pixel pitch	- mm
Response time	12 ms
Display diagonal	55 \
Display brightness	450 cd/m²
Display technology	LED
Native aspect ratio	16:9
Display number of colors	-
USB port	Yes
USB version	3.2 Gen 1 (3.1 Gen 1)
DVI-D ports quantity	1
Orientation	Horizontal/Vertical
Product color	Black
Product design	Digital signage flat panel
Bezel width (side)	11.9 mm
Placement supported	Indoor
Bezel width (bottom)	18 mm
Panel mounting interface	300 x 300 mm
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 80 %
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (standby)	- W
Power consumption (typical)	100 W
Sustainability certificates	ENERGY STAR
Cables included	AC, Phone (RJ-11), VGA
Purpose	Retail
Operating hours (hours/days)	24/7
RMS rated power	20 W
Processor cores	4
Computer system type	System on Chip (SoC)

Weight and Dimensions

Depth	54 mm
Width	1238 mm
Height	714.9 mm
Weight	17500 g

Summary

Safety Precautions

Safety-Related Components

Critical parts marked for safety require specific replacement to prevent hazards.

LCD Module Handling

Guidelines for safely handling the LCD module, avoiding damage and ESD.

Battery Replacement Warning

Caution against explosion risk if batteries are replaced with incorrect types.

Servicing Safety Guidelines

General Servicing Precautions

Essential precautions for servicing, including power disconnection and cleaning methods.

ESD Device Handling

Procedures to prevent damage to electrostatically sensitive components.

Soldering Best Practices

Recommendations for using appropriate tools and techniques for soldering.

Product Specifications

Application and Test Conditions

Defines the scope of the specification and testing parameters.

General Product Features

Details input/output interfaces, features, and general system information.

Signal Timing Details

RGB Signal Timing (PC Mode)

Specifies timing parameters for RGB input signals in PC mode.

DVI;HDMI;DP;OPS Timing (PC Mode)

Specifies timing parameters for DVI, HDMI, DP, and OPS inputs in PC mode.

HDMI;DP;OPS Timing (DTV Mode)

Specifies timing parameters for HDMI, DP, and OPS inputs in DTV mode.

Software Update Procedure

USB Update Process

Step-by-step guide for updating the software via a USB drive.

Troubleshooting Guide

Video Error Diagnosis

Troubleshooting steps for various video display issues like no video or color problems.

Power Error Diagnosis

Troubleshooting steps for power-related issues such as no power or intermittent power.

Audio Error Diagnosis

Troubleshooting steps for audio problems like no audio or distorted sound.

Function Error Diagnosis

Troubleshooting steps for errors related to remote control, buttons, or external device recognition.

Noise and Exterior Issues

Troubleshooting guidance for circuit noise, mechanical noise, and exterior defects.

Appendix: Part Exchange

LVDS Cable or Main Board Exchange

Visual guide and explanation for exchanging LVDS cables or the main board.

Power Board Exchange

Visual guide for identifying and exchanging power board related issues.

Module Exchange

Visual guide for identifying and exchanging module defects, including unrepairable cases.