Ricoh B121 Service Manual page 447

Code Meaning
0-17 Communication was
interrupted by pressing the
Stop key.
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
Suggested Cause/Action
If the Stop key was not pressed and this error keeps
occurring, replace the operation panel.
• 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 & line.
• Check for line noise or other line problems.
• Replace the FCU.
• The remote machine may be defective or may
have 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
9
ERROR CODES
B620