Yesterday we replaced the WorkCentre 6505 imaging unit. From that moment on, every color print shows regular spots as shown below (scan of blank page).
We removed the imaging unit again, cleaned the inside of the printer and placed the unit back. That did not help.
Printing multiple pages did not result in fading of the spots.
Black and white print of blank page scan shows faint grey spots with the same shape.
Any idea how to solve this ? Is it a bad imaging unit ??