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Lexmark MC2535

Lexmark MC2535

40K Developer Unit Is Stuck in the Imaging Kit

Affected products

Click Properties in the title section above.

Imaging Kit Part Number

  • 42CP0001

Developer Unit Part Numbers

  • 42CD003K, 42CD003C, 42CD003M, 42CD003Y
  • 78C0D60, 78C0D70, 78C0D80, 78C0D90

Issue description

Unable to remove the developer unit (DU) from the imaging kit unit.


If the developer unit is inserted drive side first into the imaging kit unit, it wedges the developer ground contact below the imaging kit ground spring.

The non-drive side (NDS) is usually the first side installed, which has a tab locking feature. When inserting on the NDS first, the DU becomes locked into place and requires a tool to release it.

Developer Unit (DU) is Stuck - The developer ground contact is below the Imaging Kit ground spring.

Correct Position - This is how the developer ground contact and the Imaging kit ground spring should appear.

This only occurs on the 40K Imaging Kits.

How to release the developer unit from the imaging basket

To resolve this issue, follow the step provided below:


Use a narrow tool such as a screwdriver to depress the ground spring which will release the developer ground contact.

Still need help?

If you need additional assistance, please close this browser tab or go to the Lexmark support site, type your printer model and locate

Get in Touch with Lexmark! for contact information.
When calling for support, you will need the following:

  • Affected printer model/'s
  • Printer serial number
  • Toner/imaging unit/waste toner bottle part number and serial number (include this on supply-related issues)

Please be near the product/s described in this article to expedite the support process and reduce callbacks.


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