Ricoh Aficio MP C3001 Service Manual page 1591

Code Meaning
F0-xx V.34 modem error
F6-xx SG3 modem error
SM
Suggested Cause/Action
Replace the FCU.
Update the SG3 modem ROM.
Replace the SG3 board.
Check for line noise or other line problems.
Try communicating another V.8/V.34 fax.
43
Error Codes
D393