Canon NP6251 Service Manual page 704

RDF-D1
Type
Manual feed pick-
up stationary
Manual feed
pick-up delay
Manual feed pick-
up stationary
Manual feed
delivery stationary
Manual feed
delivery
stationary
Manual feed orig-
inal left behind
Reversal lead-
ing edge skew
Reversal origi-
nal left behind
Reversal pick-
up delay
Reversal pick-up
leading edge skew
Reversal pick-
up stationary
Reversal
delay
Reversal
stationary
Stream
reading
Error
detection
If E402, E43, E406, and E408 are detected in sequence, an error will not be identified,
as each has merely been detected no more than once.
COPYRIGHT © 1997 CANON INC.
Sensor
S32 The feeding motor (M8) turns on. The original does not
leave S32 after it has been fed an equivalent of 1000 mm.
S20 The feeding motor (M8) turns on. The original is fed an
equivalent of 1000 mm. S20 does not detect the original.
S20 detects an original for an equivalent of 750 mm
S20
or more.
S20 The belt motor (M3) turns on. The original is fed for an equiv-
alent of 532 mm or more. S20 does not detect an original.
S19, S20 S20 detects an original. The original is fed for an
equivalent of "length in feeding direction
or more. The original does not leave S19.
S5 The belt motor (M3) rotates in reverse. S5 detects
an original.
S3, S4 Reversal starts. S3 and S4 detect an original with a
discrepancy of 10 mm or more in timing.
S3 Reversal starts. S3 detects paper.
S3, S5 Reversal starts. The paper is fed for an equivalent
of 163 mm from S5. S3 does not detect paper.
S3, S4 Reversal starts. S3 and S4 detect an original with a
discrepancy of 10 mm or more.
S3 Reversal starts. The original is fed for an equivalent of "length
in feeding direction
S5 The belt motor (M3) turns on. The original is fed for an
equivalent of 115 mm. S5 does not detect the original.
S5 S3 detects an original for an equivalent of "length in
feeding direction
S20 • In stream reading, the speed of the belt motor (M3)
when the leading edge of the original is at image
exposure start position is below a specific value.
• In stream reading, the copier sends a command for
an outside control speed for the belt motor (M3).
S17 • In stream reading, the point of edge feeding from the
pre-registration sensor is within a specific range.
Any of the conditions for E402, E403, E406, or E408 is detected.
Note: For each code, the first and the second faults are treated
as a jam; the third and the subsequent faults are treated as
errors. This is to prevent issuing an error in response to the
wrong placement of an original. The count returns to '0' when
the power is turned off and then on again.
Table 11-709
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 11 TROUBLESHOOTING
Chronological sequence
1.5" mm. The original does not leave S3.
1.5" mm or more.
Code
91
92
A1
A2
A3
1.5" mm
A4
15
51
52
53
54
14
41
F4H
FEH
11-173