Ricoh FACSIMILE FAX77 Field Service Manual page 160

Code Meaning
Too many errors during reception
0-23
(G3 mode)
0-50 CFR/MCF (1650 Hz) not received at
the correct time (G2 mode)
0-51 CFR/MCF (1650 Hz) carrier not
dropped for 6 s or more (G2 mode)
0-52 Polarity change occurred, or PIS
was detected but the user did not
respond (G3 or G2 mode)
Suggested Cause/Action
1. Check line connection.
2. Check connectors from FCU to modem and NCU.
3. Replace the NCU, FCU, or modem.
4. Defective remote terminal.
5. Check for line problems.
6. Ask the other end to adjust their tx level.
1. Check line connection.
2. Check connectors from FCU to modem and NCU.
3. Replace the NCU, FCU, or modem.
4. Check for line problems.
5. Incompatible remote terminal.
6. Adjust the tx level (use bit switch 3 or a dedicated tx
parameter)
1. Check connectors from FCU to modem and NCU.
2. Replace the NCU, FCU, or modem.
3. Check for line problems.
4. Check the other terminal's CFR/MCF turn-off timing on an
oscilloscope.
5. Incompatible or defective remote terminal.
1. Check connectors from FCU to modem and NCU.
2. Replace FCU or buzzer if the user call tone is not working.
3. Defective Stop key.
5-18