Canon PC921 Service Manual - Page 135
Varied by value under '30' of service mode registration adjustment.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM c. Pickup from the Multifeeder (A4, 2 copies) Copy Start key ON STBY INTR SCFW SCRV SCFW SCRV LSTR STBY Main motor (M1) Multifeeder pickup solenoid (SL4) Pickup clutch solenoid (SL1) 1sec 0.1sec(approx.) Pre-registration roller paper sensor (Q751) Registration clutch solenoid (SL2) Delivery sensor (PS3) Scanner II I 0.3sec (approx.) Forward Reverse 0.7sec (approx.) I : Varied by value under '30' of service mode (registration adjustment). II : Used for measuring the length of copy paper. length of copy paper (mm) = 96 (mm/s) × II (s) + 11 (mm) -10 (mm) 96 (mm/s) : speed at which copy paper is moved. 11 (mm) : distance between pre-registration roller paper sensor and registration roller. 10 (mm) : length of actuator of the pre-registration roller paper sensor. Figure 5-112 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-11