Ricoh D146 Service Manual page 1829

Code
0-33 The data reception (not ECM)
is not completed within 10
minutes.
0-52 Polarity changed during
communication
FCU does not detect the SG3. 
0-55
0-56 The stored message data
exceeds the capacity of the
mailbox in the SG3.
0-70 The communication mode
specified in CM/JM was not
available
(V.8 calling and called
terminal)
0-74 The calling terminal fell back
to T.30 mode, because it
could not detect ANSam after
sending CI.
0-75 The called terminal fell back to
T.30 mode, because it could
not detect a CM in response
to ANSam (ANSam timeout).
0-76 The calling terminal fell back
to T.30 mode, because it
could not detect a JM in
response to CM
(CM timeout).
SM
Meaning Suggested Cause/Action

Check the line connection.

The other terminal may have a defective
modem/FCU.

Check the line connection.
Retry communication.
FCU firmware or board defective.

SG3 firmware or board defective.
SG3 firmware or board defective.

The other terminal did not have a
compatible communication mode (e.g., the
other terminal was a V.34 data modem and
not a fax modem.)

A polling tx file was not ready at the other
terminal when polling rx was initiated from
the calling terminal.

The calling terminal could not detect
ANSam due to noise, etc.

ANSam was too short to detect.

Check the line connection and condition.

Try making a call to another V.8/V.34 fax.

The terminal could not detect ANSam.

Check the line connection and condition.

Try receiving a call from another V.8/V.34
fax.

The called terminal could not detect a CM
due to noise, etc.

Check the line connection and condition.

Try making a call to another V.8/V.34 fax.
53 D163