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OPERATIONS AND TIMING
COPYRIGHT
©
1998 CANON INC. CANON NP6621 REV.0 FEB. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
Code
Cause
• Data communication with
copier (faulty)
• Pick-up motor (faulty)
• Pick-up roller home position
sensor (faulty)
• Belt motor (faulty)
• Belt motor clock sensor
(S11; faulty)
• Feeding motor (faulty)
• Slip sensor (faulty)
• Delivery motor (faulty)
• Delivery motor clock sensor
(faulty)
• Registration sensor (faulty)
• Original sensor (faulty)
Description
• Communication breaks for 5 sec or
more. (The communication is monitored
at all times.)
• The state of the sensor remains un-
changed even after the pick-up motor
has been driven for 2 sec or more.
• The number of belt motor clock pulses is
below a specific value for 100 ms.
• The number of slip clock pulses is below
a specific value for 100 ms.
• The number of delivery motor clock
pulses is below a specific value for 200
ms.
• The output of each sensor in the ab-
sence of paper is more than a specific
value.
E400
E402
E401
E403
E404
E411
C. RDF/ADF Self Diagnosis
Caution:
1. When the self-diagnosis mechanism has turned ON, you may reset the machine by turning OFF and
then ON the copier’s power switch.
2. You may make copies even while the RF remains out of order by placing originals on the copy paper.