Canon NP6251 Service Manual page 705

CHAPTER 11 TROUBLESHOOTING
RDF-D1
Type
Delivery delay
Delivery
stationary
RDF open
Pick-up signal
error
Initial original
left behind
Size error
Stream
reading error
Error
detection
11-174
COPYRIGHT © 1997 CANON INC.
Sensor
S5, S6 S5 detects an original. The original is fed for an
equivalent of 218 mm or more. S6 does not detect
an original.
S6 S6 detects an original for an equivalent of "length in
feeding direction
S31 The RDF is identified as being open.
S13, S14, The right or left cover is identified as being opened
S23, S24, during operation.
The copier sends a command for pick-up when the
RDF is not ready.
A large-size original is detected in reduced page
composition mode.
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.
S17 • In stream reading, the copier sends a command
for an outside control speed for the belt motor
(M3).
• In stream reading, the edge feeding stop position
from the pre-registration sensor is outside a
specific range.
Any of the conditions for E402, E403, E406, or
E408 is detected.
Note: For each code, from the first to the third
faults are treated as a jam; the fourth 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 11-710
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Chronological sequence
1.5" mm or more.
Code
25
26
E2
E3
E4
E6
F4H
FEH