Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 456

The figure below shows a cut-away view of the printer, to better illustrate the
components in the Option Feeder Assembly paper path.
Error codes generated by paper jams in the Optional Feeder Trays are listed in the
Paper Jam Error Codes table on page 8-12.
Option Feeder Paper Path — Cut-away View
Phaser 4400 Laser Printer Service Manual 8-43