Canon GP160DF Service Manual page 126

CHAPTER 7 PICK-UP/FEEDING SYSTEM
b. Delay jam at the time of the second or subsequent sheet pick-up.
In this case there are 2 types of timing which monitor the feeding situation. Detection
and jam judgement is done by both these timings.
• A jam is determined at the same timing as the previously explained delay jam at
the time of the first sheet pick-up.
• Counting starts when the preceding sheet of paper has passed through the regis-
tration sensor (PS302), and if the leading edge of the next sheet of paper has not
arrived at the registration sensor (PS302) within approx. 2.0 seconds, it is judged
that a delay jam has occurred.
Pick-up sensor
(PS303)
Registration sensor
jam check
Registration sensor
(PS302)
Main motor
(M601)
Pick-up sensor
(PS303)
Registration sensor
jam check
Registration sensor
(PS302)
Main motor
(M601)
7-16
Start signal
Figure 7-604
Start signal
Figure 7-605
COPYRIGHT © 1999 CANON INC.
2.3 sec. 2.3 sec.
Normal
Abnormal
2.0 sec.
2.0 sec.
CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Abnormal