Canon PC920 Service Manual page 129

3. Re-Pickup (cassette pickup)
If the vertical path roller paper sensor (PS4) does not detect copy paper within a specific period
of time after the cassette pickup roller has started to rotate, the pickup roller is rotated once again to
execute pickup operation, thereby ensuring correct pickup (as for recycled paper).
If the vertical path roller paper sensor does not detect copy paper after re-pickup, the machine
will assume the absence of copy paper and will indicate " " in the count/ratio indicator in the
control panel. (This mechanism substitutes a paper detecting mechanism.)
Main motor (M1)
Cassette pickup solenoid (SL5)
Pickup clutch solenoid (SL1)
Vertical path roller paper
sensor (PS4)
I : Re-pickup operation is executed if the vertical path roller paper sensor (PS4) does not detect
copy paper within 0.5 sec after the pickup clutch solenoid (SL1) has turned don.
II : The cassette pickup solenoid (SL5) turns on once again about 1.3 sec after the pickup clutch
solenoid (SL1) turns on.
COPYRIGHT © 1999 CANON INC.
Copy Start key
ON
STBY INTR
0.7sec (approx.)
II
I
Figure 5-105
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5 PICK-UP/FEEDING SYSTEM
SCFW SCRV LSTR STBY
5-5