Ricoh C410DN - Aficio SP Color Laser Printer Hardware Manual page 31

Attaching Memory Unit Type D 128MB, Memory Unit Type E 256MB (SDRAM Module)
E
Be sure to install the SDRAM module as shown.
Two slots are provided for the SDRAM modules.
The default SDRAM module is installed in the inner slot.
To install an additional memory, attach an additional SDRAM module to the
outer slot, or replace the default SDRAM module.
F
When installing an SDRAM module in a vacant slot, align the notch of the
SDRAM module with the slot, and then insert the module vertically.
G
Press down the SDRAM module, until it clicks into place.
AQC670S
AET076S
AET077S
2
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