Ricoh D009 Service Manual page 1151

The names of the slots for the board and SD cards are embossed on the face of the
controller plate.
SD Slot 1, Slot 2
Slot
RPCS Printer Unit
Printer Unit
[1] Printer/Scanner Unit
Data Overwrite Security
PostScript3
Service slot for firmware version updates
Installing the optional browser unit, VM card or HDD encryption unit
[2]
Moving applications to an SD card in slot 1
Downloading/uploading NVRAM contents
SM
SD Card
3
Overview
D381