Do internal prints out of the machine also produce this "off center" effect? For example, the graphics demo page would be a good full coverage document to print. If this is off center, then you could be 100% certain its not application related, and more likely machine registration related.
Our Phaser 8560 has also just developed this problem.
It prints consistently, well off centre. This is through different PCs, different software, different trays and even applies to the printer's own test pages.
I have been through the printer settings and can't see margin altering settings that I would expect?
I have been through the Phaser manuals, I can't see a facility to reset or change margins.
Any help or thoughts would be greatly appreciated,
Your smallest margin looks exactly right (about 4mm), so the issue is the file submitted is not set to be centered in your case.
Can't help you with Corel, too rare to support, export the job as pdf and print that and by default, Adobe Acrobat/Reader will center the output to the page.