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LG 55MH5K Service Manual
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LG 55MH5K Service Manual

LG 55MH5K Service Manual

Medical monitor, chassis: lm2ha
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MEDICAL MONITOR
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71804643 (2304-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 © 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
LM2HA
55MH5K
55MH5K-WX

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Summary of Contents for LG 55MH5K

  • 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 BLOCK DIAGRAM ................. 10 EXPLODED VIEW .................. 11 TROUBLE SHOOTING GUIDE ............... 12 DISASSEMBLE GUIDE ............APPENDIX1 FIRMWARE UPDATE GUIDE ..........APPENDIX2 - 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

    External SW Input,PIP/PBP,Hotkey1,Hotkey2,Brightness- 10 Tack Key eral &Adj. ,Brightness+,OK,Contrast-,Contrast+,Menu Scope Function Picture Mode, Ratio, S.E.S, Six Color, LG Calibration Stu- dio, Factory calibration, PBP/PIP, RS-232C, User Preset Input SDI IN 4ea (12G-SDI) / Out- SDI OUT 4ea (12G-SDI) Support 1Rx SFP module Not supported 2Rx &...
  • Page 5 Max. 3840×2160 @ 60Hz HDMI Recommend 3840×2160 @ 60Hz Max. 3840×2160 @ 60Hz Recommend 3840×2160 @ 60Hz Input Voltage Voltage: AC100~240V 50~60Hz, 20.5V 9.0A - 5 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 6 3840 3840 x 2160 V(Lines) 2222 2160 H(Pixels) 533.28 133.32 4000 3840 3840 x 2160 V(Lines) 2222 2160 * 1) : DP Preferred timing - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 7 V(Lines) 2250 2160 * (1) : DVI Preferred timing. * (2) : HDMI Preferred timing. * Mode 9,10,11 can be supported to only HDMI. - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 ■ ■ 3840 2160 16:09 ■ ■ 3840 2160 29.97/30 16:09 ■ ■ 3840 2160 16:09 ■ ■ 3840 2160 59.94/60 16:09 ■ ■ - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 30p, 29.97p, 25p, 24p, 23.98p 2160 YCbCr 10bit 4:2:2 YCbCr 10bit 60p, 59.94p, 50p, 48p, 47.95p Recom- mended 12bit 30p, 29.97p, 25p, 24p, 23.98p - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 10: Block Diagram

    BLOCK DIAGRAM - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 11: Exploded View

    Do not modify the original design without permission of manufacturer. * When module or mainboard is defected by any reason, monitor should be changed to new one. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 12: Trouble Shooting Guide

    (0.95V & 1.5V) of IC906 and recheck & IC909 Output Check clock frequency Replace X400 and recheck (12Mhz) of X400 Replace IC402 (Flash memory) - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 13 Module Power (Check recheck Position: C439) Check FFC cable Replace FFC cable (defective parts & and recheck connection status) Replace LCD Module and recheck - 13 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 14 (defective parts & connection status) Replace HDMI Jack Check JK301 and recheck (defective parts) Check I2C Signal F/W download (Check position: JK301) Replace Main scaler (IC400) - 14 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 15 Check I2C Signal Check I2C Signal F/W download F/W download (Check position : P201) (Check position : P200) Replace Main scaler Replace Main scaler (IC400) (IC400) - 15 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 16 FW download - IC401 (Flash memory) Replace X400 and Check clock frequency of X400 recheck Replace IC400 and recheck FW download - IC401 (Flash memory) - 16 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 IC1700 and recheck Output Replace 12G-SDI Board Check voltage level (3.3V, Replace IC1702 & 2.5V) of IC1702, IC1703 IC1703 and recheck Output Replace 12G-SDI Board - 17 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 18: Disassemble Guide

    DISASSEMBLE GUIDE Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 7. Disassemble rear shield metal fixing screws, separate cables, and remove tapes. 5. Disassemble the VESA Metal fixing screw. 8. Disassemble the Rear shield Metal. 6. Disassemble the VESA Metal. Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 20 Monitor Exploded Method 9. Remove the hex screws and SDI JACK fixing screws. 10. Remove the PCB screws. ▣ Tool Description General drivers Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 21 (Be careful not to break the button) 3. Detach the control button. 4. Detach the indicator board using the tool. Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 22: Firmware Update Guide

    FIRMWARE UPDATE GUIDE Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 23 1. How to use the update jig 2. How to use a USB memory stick Both methods are the same, so you can choose the method that is convenient for you. Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 24 : ISP_Tool_V4.5.x.x.x (ISP Execute TOOL Program) : SW.bin file Step1. Connect United JIG Jig(Photo #1.) with Monitor & PC. Connect PC USB Port Connect the Monitor Photo #1 Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 25 2) Find drive file of your PC Windows version and selection(install). 3) If finish installing driver, please re-booting PC. Find drive file of your PC Windows version and selection(install). Find Next Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 26 Flash memory name on the pop-up screen. : Push OK. Please change ex_ to exe Occur error massage, And Execution. re-try again. (connection check) (restart program) (reboot) Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 27 : Check : End Addr. ※ Sometimes the value 0x1FFFF is displayed as an example, in which case you need to read it again. 4) Auto (Download) : After check A and B and push the “Run”. : You can see download time and finish message . Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 28 The downloading feature does not work properly when using the download file from the company security. 4. Please insert the USB memory stick to the “SERVICE ONLY” Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 29 1. After searching the highest version in LG_MNT folder of USB, the updating feature has been automatically performed regardless of the current version of monitor. [Common] When the updating feature is completed, monitor will turn off/on automatically after 3 seconds. Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 30 Q. The power turns off suddenly during updating PD FW under 50% status of progress bar, how can I do?  After turning on the power, the updating will be progress again from the beginning percentage. Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 31 4) ▶ Press 5 times 3. Move to DP Split Update menu and turn OFF to ON. 4. Run the Gprobe program to update the firmware. <fig-1> Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 32 3. How to update DP Splitter Firmware Default settings-1 Matching PORT(COM & LPT) Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 33 3. How to update DP Splitter Firmware Default settings-2 Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 34 3. How to update DP Splitter Firmware Default settings-3 Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 35 2. Modify the red box in the figure to the right based on the firmware update file. 3. Save the file. If the firmware is up to date, Enter the filename here Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 36 1. navigate to the location of the text file and press 'Execute'. 2. The update will start, the screen will cycle off and on, and it will be completed when the following text appears. Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 37 4. Please insert the USB memory stick to the “SERVICE ONLY” ※ SDI firmware updates only support upgrading from a lower version to a higher version. Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 38 2) ▲ Press 2 times 3) ▼ Press 2 times 4) ▶ Press 5 times 6. In the USB Service Port menu, click the ▶ key Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 39 8. After showing FPGA Back up, FPGA, MCU Back up, MCU update, “Update process completed.” message is shown about 3 sec . That means you are success to update Copyright ⓒ 2023 LG Electronics Inc. All rights reserved. Only training and service purposes.

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