Ricoh B064 SERIES Service Manual page 1335

Code Meaning
0-20 Facsimile data not received
within 6 s of retraining
0-21 EOL signal (end-of-line) from
the other end not received
within 5 s of the previous
EOL signal
0-22 The signal from the other
end was interrupted for more
than the acceptable modem
carrier drop time (default:
200 ms)
0-23 Too many errors during
reception
0-30 The other terminal did not
reply to NSS(A) in AI short
protocol mode
SM
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Suggested Cause/Action
Check the line connection.
Replace the FCU.
Check for line problems.
Try calling another fax machine.
Try adjusting the reconstruction time for the first line
and/or Rx cable equalizer setting.
Cross reference
Reconstruction time - G3 Switch 0A, bit 6
Rx cable equalizer - G3 Switch 07 (PSTN)
Check the connections between the FCU and line.
Check for line noise or other line problems.
Replace the FCU.
The remote machine may be defective or may have
been disconnected.
Cross reference
Maximum interval between EOLs and between ECM
frames - G3 Bit Switch 0A, bit 4
Check the line connection.
Replace the FCU.
Defective remote terminal.
Check for line noise or other line problems.
Try adjusting the acceptable modem carrier drop
time.
Cross reference
Acceptable modem carrier drop time - G3 Switch 0A,
bits 0 and 1
Check the line connection.
Replace the FCU.
Defective remote terminal.
Check for line noise or other line problems.
Try asking the other end to adjust their Tx level.
Try adjusting the Rx cable equalizer setting and/or rx
error criteria.
Cross reference
Rx cable equalizer - G3 Switch 07 (PSTN)
Rx error criteria - Communication Switch 02, bits 0
and 1
Check the line connection.
Try adjusting the Tx level and/or cable equalizer
settings.
The other terminal may not be compatible.
Cross reference
Dedicated Tx parameters - Section 4
25
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ERROR CODES
B819/B820