Ricoh FACSIMILE FAX77 Field Service Manual page 165

Code Meaning
1-71 Printer cover opened during printing
2-20 Abnormal coding/decoding (cpu
not ready)
2-40 Thermal head strobe signal did not
respond
4-00
One page took longer than 8
minutes to transmit
4-01
Line current was cut
4-02 The other end cut the received
page as it was longer than the maxi- setting, then resend.
mum limit.
Suggested Cause/Action
1. Check with the user whether the cover was opened during
printing.
2. Check the cover lock mechanism.
3. Check the cover switch position and actuation.
4. Check connections between the cover switch and the FCU.
5. Replace the cover switch or the FCU.
1. Check the connections from the FCU to the MBU and
modem.
2. Replace the FCU, MBU, or modem.
1. Replace the thermal head.
2. Replace the FCU.
1. Check for a bad line.
1. Check the line connector.
2. Check the connection between the FCU and the NCU.
3. Check for line problems.
4. Replace the FCU or the NCU.
1. Ask the other end to change their maximum receive length
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