Ricoh D146 Service Manual page 1845

Code
25-00 The machine software resets
itself after a fatal transmission
error occurred
F0-xx V.34 modem error
F6-xx SG3 modem error
SM
Meaning Suggested Cause/Action

Update the ROM

Replace the FCU.

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.
69 D163