Canon GP160DF Service Manual page 125

Detection by the registration sensor (PS302)
The conditions for detection by the registration sensor differ from the time of the first
sheet pick-up operation and the second and subsequent sheet pick-up in consecutive
paper feed.
a. Delay jam at the time of the first sheet pick-up
When paper has not arrived at the registration sensor (PS302) within approx. 2.3
seconds after the pick-up sensor (PS303) has turned ON, it is judged that a delay jam
has occurred.
Start signal
Pick-up sensor
(PS303)
Registration sensor
jam check
Registration sensor
(PS302)
Main motor
(M601)
COPYRIGHT © 1999 CANON INC.
2.3 sec.
Normal
Figure 7-603
CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 7 PICK-UP/FEEDING SYSTEM
Start signal
Pick-up sensor
(PS303)
Registration sensor
jam check
Registration sensor
(PS302)
Main motor
(M601)
2.3 sec.
Abnormal
7-15