AIO 942 Scanner Cuts Documents Off

My Dell AIO 942 printer/scanner appears to severly shift the scanned text of documents to the point when the scanned document is printed, the text along the margin is cut off. So a normal typed page with normal margins will be shifted over to the point that the margin on one side of the page disappears when it is printed off (after being scanned) and some of the letters at the margin are cut off. This is especially true when I scan documents to attach to a fax I am sending off from that printer.

I've tried turning the typed documents in the other direction, and the problem still shows up.

Once, as a work around, I drew pencil lines in the left and right hand margins of the letter I was scanning, and the scanner appeared to "see" those pencil lines and centered the letter pretty well when I printed off the fax and attachments I scanned and sent.

I pretty sure this problem has occured to others, and I would like to know if there is a fix for this, other than having to draw pencil lines in the margin to help the scanner "center" the document better. Thanks for your help!