Oce 3121 Technical & Service Manual page 157

RDF Self Diagnosis
RDF Self Diagnosis
The microprocessor, on the RDF control PBA, is equipped to check the condi-
tion of the machine. When it detects an error, the copier will display an error
code on the screen.
Code
Note:
1. When the self-diagnosis mechanism is activated, switch off the copier once
to reset.
2. You may continue to make copies while the RDF is out of order; simply open
the RDF, and place documents on the platen.
ed.2
Cause
Fault with data commu-
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nication with copier
(faulty)
Pick-up motor M1; fails
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to rotate
Pick-up sensor S5;
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faulty.
Belt motor M3: fails to
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rotate.
Clock sensor S10, for
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the belt motor: faulty.
Feeding motor M2:
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fails to rotate.
Clock sensor S9 for the
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feeding motor: faulty.
Paper sensor S1 for the
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document tray: faulty.
Registration sensor S3:
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faulty.
Description
The communication is monitored at
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all times, and this error is detected if
the communication is interrupted for
5 seconds or more.
A vane is attached to the shaft of the
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pick-up motor (M1). The rotation of
the motor is monitored as the vane
blocks the pick-up sensor (S5).
This error is detected when S5 does
not turn on and off twice or more
within 1 sec.
The number of clock pulses within
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200 msec is below a specific
number.
The number of clock pulses within
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200 ms is below a specific number.
When there is no paper present, the
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output of the sensor is 2.3 V or more.
Trouble shooting 49