I've had a 3100cn for 2 years and it started to not print near the right margin, about 3/4" from the right edge of the page. This is particularly a problem when I try to print a pdf file and the words are cut off on the right edge of the page. But any word document does the same thing. I have replaced the drum twice but this does not fix the problem. Is there something that I need to do to the printer so that I can print closer to the edge of the paper?