Oki C9300n C9300/C9500 User's Guide: Macintosh - Page 206
after switching the printer on, If the error message SERVICE CALL/034 appears on the LCD
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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. NOTE 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. C9300/C9500 Accessories • 204