Here's a good one! Xerox 123. Tray 1 works perfectly. Trays 1,2,3 and bypass will only make 1 copy at a time. If multiple copies are attempted it will Z fold but not jam. Instead comes up with a paper mismatch message. Replaced secondary feed clutch, paper sensors and feed tires. If tray 1 is removed and put in place of tray 2 the problem still remains in tray 2.