Ricoh A-C4, Руководство по обслуживанию

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SERVICE CALL CONDITIONS 20 June 2005
4-10
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 the 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 frequencyover 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
1-Bin tray motor lock 599 D
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 D
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 ADF 610 D
The BICU cannot receive a response
within 100 ms after 3 attempts after
sending data to the ARDF.
•
BICU board and ADF main board
serial line connection defective
•
External noise
•
ADF main board defective
•
BICU board defective
Communication break error between
BICU and ADF 611 D
The BICU receives a break signal from
the ADF main board.
•
Serial line connecting BICU and ADF
unstable
•
External noise
•
ADF main board defective
•
BICU board defective