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LG UltraFine 27MD5KL, Service Manual

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LG UltraFine 27MD5KL Service Manual Download Page 9

- 9 -

Copyright © 

 LG Electronics Inc. All rights reserved.

Only training and service purposes.

TROUBLE SHOOTING GUIDE

1. No Power

Ch ange  th e  X500

N

Ch eck 

C1102 Voltage:  20V

Ch eck th e Power 

Con nection

Ch ange  th e  PSU

(P ower Board)

Y

N

Y

Ch eck 

IC1101 Voltage:   3.3V

Ch ange  th e  IC1103

Y

N

Ch eck X500 Clock

14.318MHz

Ch eck 

IC1102 Voltage:   1.1V

Ch ange th e IC1101

N

Y

Ch ange th e Flash IC501

Y

Ch eck 

IC1103 Voltage:   1.5V

Ch ange  th e  IC1102

N

Y

Summary of Contents for UltraFine 27MD5KL

Page 1: ...ncluding 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 L...

Page 2: ...ronics Inc All rights reserved Only training and service purposes CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 SOFTWARE UPDATE 6 BLOCK DIAGRAM 7 EXPLODED VIEW 8 TROUBLE SHOOTING GUIDE 9 TRAINING MANUAL APPENDIX CONTENTS ...

Page 3: ...shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metall...

Page 4: ...t PD 94W PD Power delivery PD Profile 5V 9V 15V 20V USB USB3 0 2 0 communication USB down USB3 0 Downstream x 3 Audio USB data format Audio Camera Full HD Web Camera Module Microphone 1xDigital MEMS Mic ALS Ambient Light Sensor 8 Power Code Length 1 80 0 05 m Weight 0 17 kg 10 Color Black Refer to Suffix standard and power cord table 9 Cable Thunderbolt Length 2 0 0 05 m Weight 0 6 kg 10 Color Bla...

Page 5: ...orch F Resolution 1 H Pixels 25 175 31 469 800 640 16 96 48 640 x 480 V Lines 59 94 525 480 10 2 33 2 H Pixels 522 61 133 32 3920 3840 8 32 40 3840 x 2160 V Lines 60 2222 2160 1 8 53 3 H Pixels 364 47 111 12 3280 3200 8 32 40 3200 x 1800 V Lines 60 1852 1800 1 8 43 4 H Pixels 234 59 88 86 2640 2560 8 32 40 2560 x 1440 V Lines 60 1481 1440 1 8 32 5 H Pixels 966 74 177 71 5280 5120 16 64 240 5120 x ...

Page 6: ...a CAM Audio NXP and Hub 27MD5KL Support for automatic FW updates through Internet servers Manual FW update support using file open Enables recovery in case of FW update failure 1 2 Setting Automatic installation when boot the Macbook Automatic Updates On Off Factory Reset Help 2 How to FW Update 1 Go to the Monitor Update tab 2 Select FW Image ZIP file for update pop up 3 FW update started in prog...

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

Page 8: ...ics These parts are identified by in 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 IMPORTANT SAFETY NOTICE 900 HR9 HR8 HP1 120 130 540 580 HR6 LV1 HR7 590 300 200 400 150 530 591 830 140 700 AM1 ...

Page 9: ...E 1 No Power Change the X500 N Check C1102 Voltage 20V Check the Power Connection Change the PSU Power Board Y N Y Check IC1101 Voltage 3 3V Change the IC1103 Y N Check X500 Clock 14 318MHz Check IC1102 Voltage 1 1V Change the IC1101 N Y Change the Flash IC501 Y Check IC1103 Voltage 1 5V Change the IC1102 N Y ...

Page 10: ...el Backlight Change the IC800 Y N N Check the Voltage L1107 10V Change the IC1100 Y N Check the eDP Aux signal of Panel P502 36 37 Check the Solder status of IC500 And change the Main Board Y N Check the FFC Cable Check the Output of LED Driver P800 3 Change the Panel or T Con board Y Change IC501 N Check the Signal LED_ENABLE is High Y ...

Page 11: ...ed Only training and service purposes 3 TBT Up No Display Change the IC500 Check the setting of resolution and Vertical Frequency Check the Cable connection of JK100 Connect the Cable to JK100 Y N Y Check the TBT Cable connection and damage of Cable Y ...

Page 12: ...ly training and service purposes 4 Display Color changed to Gray Check the Foreign material of internal FAN Y Remove the Foreign material Check the Display 10min Color changed to Gray Change the FAN N Change the Main PCBA Or Change the Temperature Sensor Y ...

Page 13: ...TRAINING MANUAL Copyright ⓒ 2019 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 14: ... Please guide the method according to PC as below 24MD4KL 27MD5KL Brightness Audio output Apple Logo System Preferences Display adjust Brightness in the Monitor PC Brightness can be adjusted with PC setting Sound Select LG UltraFine Display Audio and can adjust Output Volume in bottom side Select the Speaker Icon in Windows Tray and then select LG UltraFine Display Audio for adjusting the Volume i...

Page 15: ...he compatibility issue such as No display or No sound etc with TBT 2 to 3 Adapter 2 Root Cause Apple Device or Adapter Limitation 3 Guidance 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 24MD4KL 27MD5KL Copyright ⓒ 2019 LG Electronics Inc All rights reserved Only training and serv...

Page 16: ...inding that the SF model is a Mac only monitor you need to ask if customer is using a Windows PC b Especially for Windows PCs with Razor Blade RZ09 2015 PCs we recommend connecting the USB device to PC because It is a PC problem It is already verified c For Windows PCs You can check Thunderbolt Version in the following order Reference For Razor Blade RZ09 2015 PCs NVM version is14 and for Razor Bl...

Page 17: ...nding of connection ports 3 Guidance 1 Checking the symptom If USB unrecognized problems occur check the following a Check which port the USB device or USB HUB is connected to 2 Customer Guide Port configuration can be divided into Host input port and USB expansion port the USB device or USB HUB must be connected to the USB expansion port for normal operation 24MD4KL 27MD5KL Thunderbolt input port...

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