Fig. 3-16 Paper Cassette Monitoring Circuitry - Canon NP-70 Service Manual

NP•70
3-51
3.4-8
PAPER CASSETTE MONITORING CIRCUITRY (ALL COPIERS)
The Jam Detection Circuit, in addition to checking the exit condition of copy paper- during
copy operations also constantly monitors to ensure that a supply of paper is present in the
paper cassette and that the cassette is properly seated in the copier.
This additional portion of the jam detection circuit is depicted in Fig. 3-16 with its associated
components.
+24VDC O
~ PART OF JAM DET. CKT. CARD
CdS2
COMP.
NETWORK
AMP
K9
Q24
_,
PL4
L3
+SVDC
1
MS 15
Fig. 3-16 Paper Cassette Monitoring Circuitry
O OVDC
1) OPERATION —CASSETTE EMPTY
This circuitry operates to bring the copier to STANDBY whenever the cassette becomes empty.
This sequence is depicted in the flowchart in Fig. 3-17.
© CANON ANC.
Second Printing,lune, 1974