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Trouble-
shooting
SERVICE CALL CONDITIONS
SM 4-9
B079/B082
Code No.
Symptom
Possible Cause
Fusing overheat error (hardware circuit
detection)
544 A
The dual monitoring circuitry of the
BICU detects extremely high
temperature and tripped the relay circuit
off.
Power supply unit defective
I/O board (IOB) defective
BICU defective
Fusing thermistor defective
Fusing lamp remains on
545 A
After warm-up the fusing lamp remains
at full power for 10 seconds without the
hot roller rotating.
Thermistor is out of position.
Fusing ready temperature unstable
546 A
The fusing temperature is fluctuating.
Thermistor connection loose
Fusing unit connector loose
Zero cross signal malfunction
547 B
The applied power supply ac frequency
was detected at over 66Hz or below
45Hz, and the zero cross signals are
not detected within a certain period
within 500 ms after the main power
switch has been turned on.
Power supply board defective
Noise on the ac power line
Fusing unit installation error
548 A
The machine cannot detect the fusing
unit when the front cover and right
cover are closed.
Fusing unit is not installed
Fusing unit connection loose
1-bin tray motor lock (optional 1-bin tray
unit)
599 C
A 1-bin tray motor lock signal is not
detected for more than 300 ms during
rotation.
1-bin tray motor locked from overload
1-bin tray motor defective
1-bin tray motor connection loose
Communication error between BICU
and scanner unit
601 C
Within 800 ms after power on, after 3
attempts the BICU does not
communicate with the SIB via the serial
line.
Serial line connecting the BICU and SIB
defective
External noise on the serial line
SIB board defective
BICU board defective
Communication timeout error between
BICU and ARDF
610 C
The BICU cannot receive a response
within 100 ms after 3 attempts after
sending data to the ARDF.
BICU board and ARDF main board
serial line connection defective
External noise
ARDF main board defective
BICU board defective
Communication break error between
BICU and ARDF
611 C
The BICU receives a break signal from
the ARDF main board.
Serial line connecting BICU and ARDF
unstable
External noise
ARDF main board defective
BICU board defective
Communication command error
between BICU and ARDF
612 C
The BICU sends a command to the
ARDF main board that it cannot
execute.
Abnormal operation performed by
software
Summary of Contents for B079
Page 1: ...B079 B082 SERVICE MANUAL 001634MIU RICOH GROUP COMPANIES ...
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Page 5: ...B079 B082 SERVICE MANUAL 001634MIU ...
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Page 29: ...INSTALLATION ...
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Page 101: ...PREVENTIVE MAINTENANCE ...
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Page 107: ...REPLACEMENT AND ADJUSTMENT ...
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Page 196: ......
Page 197: ...TROUBLESHOOTING ...
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Page 221: ...Trouble shooting SERVICE CALL CONDITIONS SM 4 23 B079 B082 INTENTIONALLY LEFT BLANK ...
Page 225: ...SERVICE TABLES ...
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Page 330: ......
Page 331: ...DETAILED SECTION DESCRIPTIONS ...
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Page 436: ......
Page 437: ...SPECIFICATIONS ...
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Page 449: ...BOOKLET FINISHER B546 ...
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Page 497: ...AUTO REVERSE DOCUMENT FEEDER B541 ...
Page 498: ......
Page 525: ...LARGE CAPACITY TRAY B543 ...
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Page 528: ......
Page 543: ...PAPER TRAY UNIT B542 ...
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Page 546: ......
Page 565: ...1 BIN TRAY B544 ...
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Page 568: ......
Page 576: ......
Page 577: ...1000 SHEET FINISHER B408 ...
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Page 580: ......
Page 605: ...TWO TRAY FINISHER B545 ...
Page 606: ......
Page 643: ...BRIDGE UNIT B538 ...
Page 651: ...PRINTER OPTION B548 ...
Page 652: ......
Page 703: ...FAX OPTION B547 ...
Page 704: ......
Page 708: ......
Page 851: ...TECHNICAL SERVICE BULLETINS ...
Page 853: ...BRIDGE UNIT B538 ...
Page 908: ...Trouble shooting SERVICE CALL CONDITIONS SM 4 23 B079 B082 INTENTIONALLY LEFT BLANK ...
Page 941: ...FIRMWARE HISTORY ...