Unwanted spots or streaks of toner that appear on the back of the printed page can be caused from a contamination inside the fuser to a physical problem with the printer. See sample page below.
Print Defect Sample
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.
Steps Actions 1
Check to see whether the printer supports the paper being used and that it meets all recommendations listed in the User’s Guide.
Make sure the Paper Type Setting on the printer and in the driver/software matches the type of paper loaded in the tray.
Run the Fuser Cleaning Process (see the subsequent table) to allow the fuser to clean itself. The toner streaking should fade away over time.
Fuser Cleaning Process
Scroll to "Fuser Cleaning Process".
Note: The "Print Cleaning" pages will print and have instructions on them to place the pages face down in Tray 1. Please follow these instructions before proceeding to the next step.
Select "Start Cleaning Process." The printer will run the pages back through to help clean the fuser.
Note: If the above information did not help to resolve the print quality issue, please contact Lexmark Technical Support or a local authorized service provider to arrange a service call.
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.