Ricoh Aficio MP 3500 Series, Руководство по обслуживанию

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SERVICE CALL CONDITIONS
B291/B295/B296/B297 4-10 SM
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 error 547 D
One of the following occurred:
1) The fusing relay remained off for 50
ms after power on and continued to
remain off after 3 attempts to detect
the zero-cross signal.
2) During 11 zero-cross signal
detections, two zero-cross signal
detections were below 44 Hz.
3) The zero-cross signal could not be
detected within 3 sec. after the
fusing relay switched on.
• Switch the main switch off and on
• Defective fusing relay, replace the
PSU
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
Zero-cross frequency over 557 C
The applied power ac frequency was
detected less than 66 Hz more than 10
times, or less than 44 Hz one time.
• Nose on the ac power line
Fusing unit jam 559 A
The fusing exit sensor detected a fusing
unit paper late jam three times. The
paper was late and the fusing exit
sensor could not detect the paper three
times.
• Remove the paper that is stopped
in the fusing unit.
• Check that the fusing unit is clean
and has no obstacles in the paper
feed path.
• If the error persists, replace the
fusing unit
Important
• SC559 code does not operate until SP1159 has been set to "1" (ON). This sets
the machine to count the number of occurrences of paper late jams in the fusing
unit. The default setting is "0" (OFF).
• SC559 is issued after the third occurrence of a paper late jam in the fusing unit.
Once this SC has been issued, the machine cannot be used until the service
technician removes the cause of the jam and restores it to normal operation.
• The jam counter is reset after a sheet of paper successfully passes the fusing
exit sensor after the cause of the jam has been removed.
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA