Do you have any instructions on how to clean a Xerox Workcentre 4150. It is leaving a dark streak down the right hand side of the page on everything it prints, not just copies.

First the to do is a "stop test." You will induce a jam before the paper reaches the fuser (which the the hot thing near the exit). The PN for the fuser is 002N02557.

If the defect exists already then the drum or transfer roller or laser may be causing it.
There are very few things that you could clean except the glass on top or the pick rollers.

Whit
Item, Inc.