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CHAPTER 5 PICK-UP/FEEDING SYSTEM
5–6
COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
D. Detecting the Size of the Cassette
1. Outline
The presence of paper and the size of paper inside the cassette are checked by the cassette
size switch PCB mounted to the left of the cassette slot.
When the cassette is set in the copier, the cassette paper size switching block and the AB/
Inch switching block act on the cassette size switch PCB to enable detection of the presence/
absence of a cassette and the size of paper inside it.
The cassette paper size switching block slid to the front and rear by the work of the cam
linked to the cassette paper size dial, causing the cassette paper size switching block to turn on/
off the cassette size switch PCB.
The AB/Inch switching block, on the other hand, turns on/off the switch on the cassette size
switch PCB according to how it is positioned. (The AB and Inch size notations are switched over
by sliding the AB/Inch switching lever.)
Figure 5-207
A4R
U1
Cassette paper size
setting knob
Cam
Cassette paper
size display
Cassette paper size
changing block
AB/Inch changing block
AB/Inch
changing lever