Dell C2665dnf Color Laser Printer - Manual (Page 521)

5 Remove the jammed paper.
6 Insert tray1 into the printer, and push until it stops.
7 Insert the MPF into the printer.
If error code: 050-129 appears:
Follow the instructions in "If error code: 050-129 appears:" to clear paper jams.
Clearing Jams 519