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EC7.5 'Base=.P043, Engine=.E732' Firmware Download, Instructions, and Release History for the Lexmark MS812de and M5170 (March 2020)

Document ID:RE184

Usergroup :External
01/22/20 Properties  


Firmware information (March 2020)


 Printer Firmware filename/s EC7 code level


LW75.DN7.P043 FDN.DN.E732.fls Base: LW75.DN7.P043
Engine: FDN.DN.E732

NOTE: MS81x single function printer equipped with a 7" (177.8mm) color touch screen. Periodic printer firmware updates address end-user performance issues, provide new functionality, and provide performance improvements. Firmware updates may modify printer settings and cause counterfeit and/or unauthorized products to stop working; i.e., supplies, parts, materials (such as toners and inks), software, or interfaces. Authorized use of genuine products will not be affected.


Article contents


Firmware availability


Models Latest firmware level (EC7.5)
Standard base models

See update methods below for firmware update instructions.

DLE*-equipped models:
  • Forms and Barcode
  • Prescribe
  • PrintCryption
  • IPDS

Contact Lexmark Technical Support

 *Downloadable language emulator 


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Firmware update instructions and decisions   


Step 1: Identify current code levels and follow the decisions below. See "How to check printer firmware levels"  

Important upgrade decisions:

If... Then...
Base code is ≤ LW70.\\.P022 and engine code is ≤ .E722
  1. Review current release notes and history below to identify a needed fix or function.
  2. Read and eliminate all remaining decisions in this table.  
  3. Continue to Step 2.
Base code is already at EC5.0 (LW50), but my firmware requirements call for EC4.0 or EC4.05 - LW40.##.P436 or .P439

You must first revert to an intermediate code level of EC4.1 (LW41.##.P454).

  1. Go back to the product page to obtain EC4.1.
  2. Extract the .zip file contents.
  3. Send EC4.1 to the device.
  4. Once you have verified the device is at EC4.1, you can now send EC4.0 or EC4.05.
Failure to comply with these instructions will result in a 900 service error.

Click here for more information and device recovery instructions.

Base code is already at EC5.0 (LW50) as seen under Device Information (example), but I am still witnessing an issue with the device.

Search KnowledgeBase for another solution, or contact Lexmark Technical Support.

I have code installed that is not recognized in this article, or I have had a special build of firmware provided by members of Lexmark's product engineering team.
  1. Review current release notes and history below to identify a needed fix or function.
  2. Proceed to Step 2 only if you have confirmed the presence of the fix or function provided by your special build of firmware. 
  3. Contact Lexmark Technical Support if you need additional confirmation that this upgrade is safe.
I have DLE- specific firmware code.

Installed DLE as see under Device Information

DLE options include PrintCryption, Prescribe, IPDS, and Forms and Barcode.

DLEs are base-code dependent, so
  1. Review current release notes and history below to identify a needed fix or function.
  2. Contact Lexmark Technical Support to request a DLE-specific version of this code level.
  3. You will be asked what type of DLE card is installed in the device.
  4. Click here if you installed a DLE and received an error.


Step 2: Download and extract the .zip file. See Firmware availability above.

The .zip file contains the following files:

    • Firmware.fls file
    • README update instructions
    • Release notes 


 Step 3: Update the printer.  


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.FLS file update methods  


Make sure the printer is READY to receive firmware, and do not interrupt the printer's power or data connection during the update process.  

Firmware flash methods (.fls file extensions) Information Recommended use
The device Web page or embedded Web server (EWS

Open your Internet browser and enter the device's IP address. Select Settings > Update Firmware.

Click here for an example.

This is the preferred firmware update method if:

  • The device is connected to your network, and
  • HTTP (port 80) is enabled allowing you to access its EWS, and
  • Access controls are not limiting remote management.
USB utility Click here for an example. This is an alternative flash method for USB-attached printers in a Microsoft environment.
USB thumb drive Click here for an example.

This alternative flash method is used only if:

  • You have a standalone device, and
  • No access to a computer, and
  • Access controls are not limiting flash drive access.
FTP Click here for detailed steps.

This alternative flash method is used only if:

  • The device has HTTP (EWS) disabled, and
  • There is no access to a Microsoft Windows computer, and
  • FTP (port 21) is enabled on both the printer and the network, and
  • Access controls are not limiting FTP function.
Markvision Enterprise


Download the latest User's Guide and perform a search on Print Server updates or Generic File downloads.

Large fleets
Printer File Loader
Click here for detailed steps. This is an alternative flash method for USB-attached devices in an Apple environment.



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How to check printer firmware levels

To do this, obtain the Menu Settings page or access the printer's embedded web server (EWS) for this purpose. 

Checking firmware levels via Printer Menu's Setting page

1 Press the Menu button on the Operator Panel.
2 Touch Reports.
3 Touch Menu Settings Page to start printing.

Look for the code level under “Device Information”. 


Checking firmware levels via the printer's embedded web server (EWS):

1 Launch your internet browser application.
2 After http://, enter the printer's IP address.

Click on Reports.

4 Click on Device Information.


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Contact Lexmark

If you need additional assistance, please go to the Lexmark support site, type your printer model and locate Get in Touch with Lexmark! for contact information. NOTE: When calling for support, you will need the following:

  • Name and version of the solution
  • Affected printer model/s
  • Printer serial number



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