NEC 2300 DL - Manual (Page 92)

Clearing Media Jams 84
If the optional lower feeder unit is installed, close the lower-right door.
The media jam message is no longer displayed in the printer message
window.
Check the right-side release to make sure the door is securely closed.
Duplex Option
1
Pull off the top of the duplex option to
open the duplex option cover.
2
Remove the jammed media in the directions shown in the illustration.