Dell C2665dnf Color Laser Printer - Manual (Page 529)

11 Insert tray1 into the printer, and push until it stops.
12 Insert the MPF into the printer.
Clearing Paper Jams From the Optional 550-Sheet Feeder
NOTE: To resolve the error displayed on the touch panel, you must clear all print media from the print media path.
1 Pull the optional 550-sheet feeder out of the printer about 200 mm.
Clearing Jams 527