EPSON AcuLaser C9200 Series User's Guide
4.Confirm that the notch on the expansion memory module matches with that of the slot, and then firmly insert the top edge of the memory module into the slot until it stops. Then press both sides of the memory module down.
*
* notch
c❏ Do not force the memory module into the slot.
❏Be sure to insert the memory module facing the correct way.
❏Do not remove any modules from the circuit board. Otherwise, the printer will not work.
5.Reattach the left side cover as shown below.Caution:
Installing Options 152