NEC 2300 DL - Manual (Page 124)

Duplex Option 116
Installing the Duplex Option
1
Turn off the printer, and unplug the
power cord and interface cable.
2
Remove the cover from the right side
of the printer. Use a Phillips
screwdriver to remove the two screws
securing the right cover.
"#
Keep the removed cover and
screws in a safe place for
future use.
3
Remove the duplex option from the
shipping carton.
4
Remove any tape from the duplex unit.
"#
We strongly suggest that you save the packing materials in case
you ever need to move or ship the printer.