Ricoh M281 Series Service Manual page 851

shown below.
19. Connect the connector of the speaker.
20. Connect the flat cable [A] to CN603 of the removed FCU board [B].
21. Turn ON the main power.
SRAM data transmission starts. When the transmission is completed, you will hear a beeper
sound.

The beeper sound is at the same volume as the speaker sound.

The beeper sounds even if the speaker sound is turned off.

If the beeper does not sound, repeat the main power OFF/ON until the beeper
sounds, and then perform the transmission procedure. If the data cannot be
transmitted, repeat transmission 2 or 3 times.

If the beeper does not sound after turning the main power OFF/ON 3 times, you need
SM 17
FCU
D255/D256 FAX OPTION