Canon NP6085 Service Manual page 314

3. OPERATIONS AND TIMING
B. RDF Self Diagnosis
Code
• Copy data communication (fault)
E400
•.Pick-up roller sensor (S8, S21; fault)
E401
• Pick-up motor (M1; fault)
• Pick-up clutch (CL1; fault)
• Belt motor clock sensor (S11; fault)
E402
• Belt motor (M3; fault)
•.Reversing motor clock sensor (S10;
E403
fault)
• Reversing motor (M2; faulty)
E404 •.Delivery motor clock sensor (S12;
fault)
• Delivery motor (M5; fault)
• Pick-up motor clock sensor (S9; fault)
E405
• Pick-up motor (M1; fault)
• Original stopper motor (M7; fault)
E406
•.Stopper home position sensor (S26;
fault)
E407
• Original tray ascent motor (M6; faulty)
• Tray position sensor (S25; faulty)
•.Feeding motor clock sensor (S22;
E408
fault)
• Feeding motor (M8; fault)
• Registration sensor 1 (S3; fault)
E411
• Skew sensor1 (S4; fault)
•.Manual feed registration sensor
(S19; fault)
•.Image leading edge sensor 1 (S20;
fault)
• Original sensor 1 (S1; fault)
• Original sensor 2 (S27; fault)
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COPYRIGHT © 1996 CANON INC.
Cause
CANON NP6085 REV.0 JULY 1996 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description
•.The communication is monitored at all
times. The exchange of data with the
copier is absent for 5 sec or more.
•.Initialization does not end in 2 sec;
otherwise, for the pick-up roller, the flat
face of the D-cut roller is at the top and
is at home position.
•.The number of belt motor clock pulses
for 100 msec is less than a specific
value.
•.The number of reversing motor clock
pulses within 100 msec is less than a
specific value.
•.The number of motor clock pulses within
200 msec is less than a specific value.
•.The number of pick-up motor clock pul-
ses for 20 msec is less than a specific
value.
•.The guide does not complete movement
within a specific period of time (operated
by the original stopper motor).
•.The tray does not complete movement
within a specific period of time (operated
by the original tray ascent motor).
•.The number of feeding motor clock pul-
ses within 100 msec is less than a spe-
cific value.
•.The output of the sensor is 2.3 V or
more in the absence of paper.