Ricoh C410DN - Aficio SP Color Laser Printer Hardware Manual page 56

Installing Options
B
Turn off the power, and then unplug the power cable.
C
Disconnect the cables from the ethernet port and the USB port of the print-
er, and cover each port with its protective cap.
2
D
Loosen the two screws and remove the cover of the Gigabit ethernet board
installation unit.
The removed cover is not used when installing the interface unit.
E
Fully insert the Gigabit ethernet board.
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AQC046S
AQC091S
AQC043S