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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
09/02/13 Properties  


Print Quality; Smudges; Bleeding colors; Smearing; Blurry; Fuzzy; Toner not sticking to page; Fusing; Wipes off; Flaking; Comes off; Rubs; Poor fuse grade; Bad; Adhesion; Does not stick to page;



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
Click Image to Enlarge Click Image to Enlarge

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.




The first thing to do when this error occurs is to flash the updated engine code to the printer. At the time of writing, the latest engine code level is level E305.

Steps Actions
1 Go to
2 Type your printer model in the “Enter Product Name” field and click  OR click on the picture of the correct printer model shown.

Locate the “Downloads” tab.

4 Select the version of the Operating System.
5 Click the link available under "Firmware".

After downloading the firmware, proceed with any of the methods below to perform the update.

Firmware Flash Methods Information
Embedded Web Server (EWS) Recommended Open a browser and enter the IP address of the printer. Select Settings > Update Firmware.
USB utility Click here for the detailed steps.
USB thumb drive Click here for the detailed steps.
FTP Click here for the detailed steps.
Printer File Loader
Click here for the detailed steps.

NOTE: Updating the firmware should resolve this type of error code. If you have the latest code installed and the error persists, or you are having difficulties updating the printer's firmware, please contact Lexmark Technical Support.  



Contacting Lexmark

Please contact Lexmark Technical Support if you need additional assistance. NOTE: When calling for support, you will be asked for your machine/model type and serial number (SN). If you need help locating your printer's model type and serial number, click here.

Please call from near the printer in case the technician on the phone asks you to perform a task involving the printer.



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