I had the opportunity to work on a Xerox DocuMate 3220 over the years and here are some things that you need to keep in minds.
Jam on the Automatic Document Feeder
It is possible to have a jam on the Automatic Document Feeder (ADF) and it is usually caused by foreign material. The first time I supported a jam on the ADF was due to hole-punch dots that fell in from the overhead shelf which had the Xerox DocuMate 3220 underneath. The second and last time was due to a paperclip. As the user was not aware of the cause on the first incident, I told them on the second incident and encourage them to relocate the scanner which they happily agreed to. A year has passed and I have not been called back for any ADF issues.
Scanning to PDF
When scanning, you will, unfortunately, have to scan to a .BMP file by default but there is a trick to it. Install Adobe Acrobat and use the Create to PDF function. The Acrobat software will talk to your scanner and will then have all your pages scanned into one easy to share PDF file.