I don't think you will find it for paper sizes, I can say that the unprintable margin for all paper is supposed to be 4.4mm/ .17 inches from the edge of the paper (Xerox does not make borderless printers)
So two margins of 4.4mm is 8.8mm reduced for each direction.
A3 is 297mm * 420mm.
So the print area should be spec'd at 288.2mm * 411.2mm.
Of course there are shifts that occur with stock types and machine degradation (worn rollers etc) so the best way to *know* without a doubt what your particular device is capable of (Not what it is supposed to be able to do) the best way is to lift the document feeder and make a copy of absolutley nothing on to whatever stock you want to see the margins for. The light in the room will cause the machine to output a page of nothing (black). This will clearly show exactly where your margins are.
Hi, I've been searching online everywhere and can't find the maximum printable area for A3 paper on a WorkCentre 7220/7225.
It would be great if I could have this information.