Dell 3115cn Color Laser Printer - Manual (Page 114)

Installing a Memory Card
Your multifunction printer supports 256 MB, 512 MB, and 1024 MB additional memory cards.
Ensure that the multifunction printer is turned off. 1.
Turn the screw on the control board cover in a counter-clockwise direction and open the cover. 2.
With the connector of the memory card toward the slot, insert the memory card at an angle into the
slot. 3.
Push the memory card into the slot firmly. 4.