Canon NP6251 Service Manual page 795

CHAPTER 11 TROUBLESHOOTING
B. RDF-D1
Code
• Data communication (with copier)
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; fault)
• Delivery motor clock sensor (S12;
E404
fault)
• Delivery motor (M5; fault)
• Pick-up motor clock sensor (S9;
E405
fault)
• Pick-up motor (M1; fault)
• Original stopper motor (M7; fault)
• Stopper home position sensor (S26;
fault)
E406
• Motor (out of order)
• Tray trailing edge sensor (low
performance)
• Original tray ascent motor (M6;
E407
fauly)
• Tray position sensor (S25; fault)
• Feeding motor clock sensor (S22;
E408
fault)
• Feeding motor (M8; fault)
• Registration sensor 1 (S3; fault)
• Skew sensor 1 (S4; fault)
• Manual feed registration sensor
(S19; fault)
E411
• Image leading edge sensor 1 (S20;
fault)
• Original sensor 1 (S1; fault)
• Original sensor 2 (S27; fault)
11-264
COPYRIGHT © 1997 CANON INC.
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Cause
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Description
• The communication is monitored at
all times. The error occurs when
there is an interruption for 5 sec.
• Initialization does not end in 2 sec.
(The flat face of the pick-up roller/D-
cut roller is at top, and is at home
position.)
• The number of belt motor clock
pulses within 100 msec is less than
specified.
• The number of reversal motor clock
pulses within 100 msec is less than
specified.
• The number of delivery motor clock
pulses within 200 msec is less than
specified.
• The number of pick-up motor clock
pulses within 200 msec is less than
specified.
• The guide shift by the original
stopper motor does not end within a
specific period of time.
• The sensor output does not change
when the original stopper motor has
been driven for 2 sec or more.
• The tray shift by the original tray
ascent motor does not end within a
specific period of time.
• The number of feeding motor clock
pulses within 100 msec is less than
specified.
The sensor output is 2.3 V or more in
the absence of paper.