Hi
Thank you for using the Xerox forum.
There are many tips for image quality problems on the Xerox 7845 support site.
I would suggest that you review the following solution.
Vertical White Lines or Streaks - One Color
Clean the Printhead Lenses
If that does not resolve your issue you may consider contacting our specific product support experts at the following link:Fast Track to the Expert
Someone in the office changed our black toner cartridge out this morning and now every time we print/copy something, there is an area of print about a 1/2 inch wide, one third of the way down the paper that is smeared every time. I'm not sure if it was doing this before the cartridge was changed out, as I was not yet here this morning.
Any clue on what it could be and what I can do to fix the situation?