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LG UltraFine 27MD5KL Service Manual
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LG UltraFine 27MD5KL Service Manual

5k monitor
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UltraFine 5K MONITOR
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL70041064 (1904-REV00)
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.
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
LM8JA
27MD5KL
27MD5KL
27MD5KLB
CONFIDENTIAL
27MD5KL-BJ
27MD5KL-BK
27MD5KLB-BK

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Summary of Contents for LG UltraFine 27MD5KL

  • Page 1 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.

  • Page 2: Table Of Contents

    SPECIFICATION ..................4 SOFTWARE UPDATE ................6 BLOCK DIAGRAM ................... 7 EXPLODED VIEW ..................8 TROUBLE SHOOTING GUIDE ..............9 TRAINING MANUAL ..............APPENDIX - 2 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Safety Precautions

    When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Specification

    Weight : 0.67 kg ± 10 % Power Rating 100-240V~ 50/60Hz 2.5A It was checked by HQ Standard. Accessory Box Thunderbolt3 Cable/USB-C Cable/Power Cord/ESG/ VESA Bracket - 4 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 5 2560 2560 x 1440 V(Lines) 1481 1440 H(Pixels) 966.74 177.71 5280 5120 5120 x 2880 (1) V(Lines) 2962 2880 * (1) : Preferred timing. - 5 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 6: Software Update

    - Automatic installation when boot the Macbook. sage output. - Automatic Updates On/Off - Factory Reset - Help 2. How to FW Update 1) Go to the Monitor Update tab - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Block Diagram

    BLOCK DIAGRAM - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 8: Exploded View

    It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 9: Trouble Shooting Guide

    Ch ange th e IC1102 IC1102 Voltage: 1.1V Ch eck X500 Clock Ch ange th e X500 14.318MHz Ch ange th e Flash IC501 - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 An d change the M ain Board P 502(#36,37) Ch eck th e FFC Cable Ch ange th e FFC Cable Ch ange th e Panel or T -Con board - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 11 Frequency. Check the TBT Cable connection and damage of Cable. Check the Cable connection Connect the Cable to JK100 of JK100 Change the IC500 - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 12 Remove the Foreign material Change the FAN Check the Dis play 10min (Color changed to Gray) Change the Main PCBA Or Change the Temperature Sensor - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 13: Training Manual

    TRAINING MANUAL Copyright ⓒ 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 14 Display Audio and can adjust Output Volume in bottom side Windows impossible. Select the Speaker Icon in Windows Tray, and then select LG UltraFine Display Audio for adjusting the Volume Copyright ⓒ 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 15 1) Checking the symptom: To guide the customer that they need to check the Apple Device List in Apple website. And it may caused by TBT2 to 3 Adapter or Apple Devieces. Copyright ⓒ 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 16 Because the 2015 PC has a low NVM version, it may cause compatibility problems with monitors. From the desktop icon tray, Bottom left, select “information” Right-click above ICON and select "Settings" Copyright ⓒ 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 USB device (or USB HUB) must be connected to the USB expansion port for normal operation. <24MD4KL> <27MD5KL> Thunderbolt input port Thunderbolt input port USB expansion port USB expansion port Copyright ⓒ 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.

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