I have an odd problem with my Xerox 240 copier. It was recently serviced, and everything prints from files just fine. But I've noticed that when I make copies from the glass, the prints come out red. REALLY red. Things that are supposed to be orange or pink come out a deep red. I've color calibrated the machine, but get the same result. Is there a setting I can access or do I need to place yet another service call?