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Smearing, Smudging, or Poor Fuse Grade on Pages Printed from the Lexmark CS310, CS410, CS510, CX310, CX410, and CX510

Document ID:SO7218

Usergroup :External
10/03/19 Properties  


Affected Products:

Single-Function: CS310, CS317, CS410, CS417, CS510, CS517, C2132

Multifunction: CX310, CX317, CX410, CX417, CX510, CX517, XC2130, XC2132


Issue Description:

This article deals with the print quality defects known as "blocking", "smudging" and “poor fuse grade”. While the fuser unit is the most likely source of the issue,
it is possible that the fuser is not damaged. but rather failing to reach its proper operating temperature due to incorrect settings.

  • Blocking refers to toner flaking or peeling off the page if something is written on media placed on top of the printed page. 
  • Smudging refers to the toner breaking off a page when it is rubbed. This will normally only happen with grayscale images.

Print Defect Sample

Image 1 Image 2

This article will help you confirm the problem. Please refer to the directions in the table below to help determine which hardware part is causing the issue.



To resolve this issue, make sure to flash the updated firmware engine code to the printer. 

Note: For steps on how to update and download the latest firmware version, please refer to KB Article HO550

Updating the firmware should resolve this type of issue. If you have the latest code installed and the Print quality defect still appears, please refer to the Still Need Help section of this document.


Still Need Help?

Have the following available when calling Lexmark Technical Support;

  • Printer model(s)
  • Printer serial number
  • Toner/imaging unit/waste toner bottle part number and serial number 


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