Canon PC940 Service Manual - Page 129

CHAPTER 5 PICK-UP/FEEDING SYSTEM 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.) Copy Start key ON STBY INTR SCFW SCRV LSTR STBY Main motor (M1) Cassette pickup solenoid (SL5) Pickup clutch solenoid (SL1) Vertical path roller paper sensor (PS4) 0.7sec (approx.) II I 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. Figure 5-105 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-5