Ricoh M281 Series Service Manual page 852

FCU
to input the settings stored in SRAM memory manually.
22. When the message "Ready" is displayed on the operation panel, turn the main power
OFF.
23. Disconnect the flat cable [A] from the removed FCU board [B].
24. Disconnect the connector of the speaker.
25. Remove the new FCU board [A] from the main machine.
26. Reattach the controller box cover [A].
D255/D256 FAX OPTION 18 SM