I recently helped unbox a Xerox Workcentre 6400 copier in Denver. It came in packaged well, even though UPS had the device upside down… which was different for us, considering it came on a pallet…
After we got this device unpackaged, we plugged it in, crossing our fingers just hoping the UPS driver didn’t mess up the copier by having it upside down. We plugged it in, and things seemed fine, except it was loud. Really loud. I thought it sounded like a fan working too hard. I started going around the machine and it was the air filter in the back left corner (if you are facing the device.) I would grab it and it would sound fine. I thought, maybe it is just this machine. I then helped unbox another Xerox WorkCentre 6400 copier, and same result.
So, what did I do? I just took a piece of tape and made the filter so that it would not move. The sound went away. Best solution? Probably not, but it fixed my issue.
Overall, I have been quite happy with the Xerox WorkCentre 6400, this has been my one complaint!