A vendor recently sent an army of technicians, over four visits, to address the color disparity between 2 identical Xerox MFPs (one had been used twice as much over 3 years). They began by replacing all the consumable parts, calibrating both units and color correcting via the driver (helped a little), but the unit still had a red haze when printing gray tones. The last tech, after a series of cleanings and calibrations, fixed the color by cleaning the laser plate, then recalibrating both the fiery and the copier, in that order.
