Canon PC920 Service Manual page 139

3. Single-feeder Pickup Delay Jam
After being detected by the single-feeder paper sensor, if copy paper does not reach the pre-
registration roller sensor within a specific period of time, the machine will identify the condition as
a single feed pickup delay jam, stop the operation immediately, and flash the Jam indicator.
Single-feeder paper sensor (PS5)
Jam check
Pre-registration roller paper
sensor (Q751)
Main motor (M1)
4. Vertical Path Stationary Jam
If copy paper fails to move past the vertical path roller paper sensor within a specific period of
time because of faulty feeding, the machine will identify the condition as a vertical path stationary
jam, stop the operation, and flash the Jam indicator.
Cassette pickup solenoid (SL5)
Jam check
Vertical path roller
paper sensor (PS4)
Main motor (M1)
COPYRIGHT © 1999 CANON INC.
Copy paper inserted
STBY
Figure 5-119
SCRV
0.5sec
Normal
Figure 5-120
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5 PICK-UP/FEEDING SYSTEM
INTR SCFW
5.1 sec
Jam
1.5 sec
indication
SCFW SCRV
0.5sec
Jam
1.5sec
5-15