New Lexmark Firmware MXTCT.250.279 May Affect Compatible Toner Chips

Lexmark has released a new firmware version, MXTCT.250.279, affecting a range of Lexmark monochrome printers.

For distributors, printer service companies, and users of compatible toner cartridges, this firmware update deserves special attention.

According to Lexmark's firmware documentation, firmware updates may cause counterfeit or unauthorized products, supplies, parts, materials, and other components to stop working. This can include toner cartridges using compatible or replacement chips.

If you are currently using a compatible toner chip, we recommend checking the printer's firmware version before accepting the update， You can disable the automatic update program if you don't want to update it.

More importantly, if your printer has already been updated to MXTCT.250.279, Vprintech now has a new compatible chip solution designed for the updated firmware.

Affected Lexmark Printer Models

The affected models include the following Lexmark monochrome printer and MFP series.

Lexmark MS / MX Series

• MS331dn

• MS431dn

• MS431dw

• MX331adn

• MX431adn

• MX431adw

• MX432adwe

• MS321

• MS421

• MS521

• MS621

• MS622

• MX321

• MX421

• MX521

• MX522

Lexmark B / MB Series

• B2338dw

• MB2338adw

• B2442dw

• MB2442adwe

• B2546dw

• MB2546adwe

• B2650dn

• B2650dw

• MB2650adwe

Affected Toner Cartridge and Imaging Unit Part Numbers

The following are the main Lexmark OEM toner cartridge and imaging unit part numbers associated with the affected printer families.

1. MS331dn / MS431 / MX331 / MX431 / MX432 Series

2. MS/MX321 / 421 / 521 / 621 / 622 / MX522 Series

3. B / MB2338 / 2442 / 2546 / 2650 Series

What Happens If You Update the Firmware?

If a printer is using an older compatible toner chip, updating the firmware may cause the chip to become incompatible with the printer.

In this situation, the printer may no longer recognize the toner cartridge correctly or may display a toner-related error.

This does not necessarily mean that the toner cartridge itself is defective.

The issue may be related to the compatibility between the existing chip and the newly updated printer firmware.

Lexmark itself warns that firmware updates may cause unauthorized supplies or components to stop working.

Already Updated to MXTCT.250.279? Vprintech Has a Solution.

If your Lexmark printer has already been updated to MXTCT.250.279 and your existing compatible toner chip is no longer working, there is no need to replace the complete toner cartridge immediately.

Vprintech now offers new compatible chips designed to work with the updated MXTCT.250.279 firmware.

The solution is simple:

Existing compatible chip

Printer updated to MXTCT.250.279

Existing chip may no longer be recognized

Replace with the new Vprintech compatible chip

Continue using the toner cartridge with the updated firmware

This provides a practical replacement solution for distributors, printer service companies, and end users who have already performed the firmware update.

Important Reminder for Distributors and Service Companies

If you sell or remanufacture compatible toner cartridges for these Lexmark models, we recommend checking the firmware status of your customers' machines before supplying the previous-generation compatible chips.

For machines that have not yet been updated, please confirm chip compatibility before performing a firmware upgrade.

For machines that have already been updated to MXTCT.250.279, Vprintech can supply the new compatible chip version designed for the updated firmware.

Please contact us with the following information:

• Printer model

• Toner cartridge part number

• Current firmware version

• Chip version, if available

• Printer error message or display photo

Our team can help confirm the appropriate compatible chip solution.

Need Compatible Chips for the New Firmware?

Firmware updated to MXTCT.250.279?

Your existing compatible chip no longer works?

Contact Vprintech for the new compatible chip solution.

We supply compatible printer consumables and spare parts for distributors, printer service companies, rental companies, and printing businesses worldwide.

Vprintech — Your Professional Supplier of Compatible Printer Parts & Consumables.