Canon GP160DF, Service Manual

Page: 128 / 797

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 7 PICK-UP/FEEDING SYSTEM
7-18
3. Registration sensor stationary jam (for cassette pick-up)
A registration sensor (PS302) stationary jam is only detected when continuous multi-
ple sheet pick-up takes place.
At the time of the following sheet pick-up, the jam detection starts within approx. 3.0
seconds after the pick-up sensor (PS303) has turned ON (the following sheet leading
edge is in a position of approx. 10mm in front of the vertical path roller).
If approx. 2.5 seconds has passed, but the trailing edge of the preceding sheet has
not left the registration sensor (PS302), the registration sensor judges a delay jam has
occurred.
Figure 7-608
Pick-up solenoid
(SL301)
Pick-up sensor
(PS303)
Registration sensor
jam check
Registration sensor
(PS302)
Main motor
(M601)
Start
signal
0.3 sec.
2.5 sec.
0.3 sec.
2.5 sec.
Normal
Abnormal
First sheet
Second sheet Third sheet