Cleaning the Paper Guide
If you see ink on the back of a printout, you can clean the paper guide rollers to remove any excess ink.
Make sure there are no errors on the LCD.
Load a few sheets of plain paper in the product (or in cassette 1 if your product has two cassettes).
button, if necessary.
You see a screen like this:
Scroll down and select
Paper Guide Cleaning
Select the paper source to clean.
Check the back of the ejected paper to see if it is clean.
Repeat as necessary until the paper comes out clean.
If the paper comes out stained even after several cleaning attempts, try cleaning the other paper sources.
Adjusting Print Quality