Error Codes
D0CK 20 SM
3. TROUBLESHOOTING
3.1 ERROR CODES
If an error code occurs, retry the communication. If the same problem occurs, try to fix the problem as
suggested below. Note that some error codes appear only in the error code display and on the service
report
Code Meaning Suggested Cause/Action
0-00 DIS/NSF not detected within 40 s of
Start being pressed
• Check the line connection.
• The machine at the other end may be
incompatible.
• Replace the FCU (PCB2).
• Check for DIS/NSF with an oscilloscope.
• If the RX signal is weak, there may be a bad
line.
0-01 DCN received unexpectedly
• The other party is out of paper or has a jammed
printer.
• The other party pressed Stop during
communication.
0-03 Incompatible modem at the other end The other terminal is incompatible.
0-04 CFR or FTT not received after modem
training
• Check the line connection.
• Try changing the TX level and/or cable
equalizer settings.
• Replace the FCU (PCB2).
• The other terminal may be faulty; try sending to
another machine.
• If the RX signal is weak or defective, there may
be a bad line.
Cross reference
• TX level - NCU Parameter 01 (PSTN)
• Cable equalizer - G3 Switch 07 (PSTN)
• Dedicated TX parameters in Service Program
Mode
0-05 Modem training fails even G3 shifts
down to 2400 bps.
• Check the line connection.
• Try adjusting the TX level and/or cable
equalizer.
• Replace the FCU (PCB2).
• Check for line problems.
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