Unpack and Assemble the Scanner
1.Remove all shipping tape from the top and bottom of the scanner.
2.Open the ADF cover and carefully remove any foam particles that may have gotten inside the Automatic Document Feeder, then close the cover.
3.Lift the scanner lid and slide the locking tab to its unlocked position. The scanner will not scan when locked.
Unlocked position
14Xerox DocuMate 3920 User’s Guide