Oki C9300 User Manual page 395

a. Align the module with the narrow strip (1) on its metallic contact
edge to the right (toward the slot identifier numbers ) of the
control board.
b. Carefully insert the module in the socket, placing the ends into
the slot in the lock tabs. Press down firmly, until you feel the
board engage the connector, then make sure the white tabs
come up to lock the module in place..
4. Replace the main board and secure it with the two screws.
5. Reconnect the printer interface cable and power cable, then
switch on the printer.
If the error message SERVICE CALL/034 appears on the LCD
after switching the printer on, turn the printer off and pull the
main board back out and make sure the memory modules
have been installed correctly.
NOTE
C9300/C9500 Accessories • 395