Service manual

COPYRIGHT © 1999 CANON INC. CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 7 PICK-UP/FEEDING SYSTEM
7-6
C. Paper size detection
The size of the paper inside the cassette is monitored by the DC controller PCB’s
CPU. The CPU detects the change in position of the cassette paper size lever which is
set by the customer.
When the cassette is inserted into the main unit, the paper size lever presses the
main unit’s paper size switch and therefore the presence of paper in the cassette and
also the paper size is monitored.
The construction of the paper size switch is illustrated in the diagram below. The
paper size lever is comprised of 4 push switches which detect the paper size.
Figure 7-304
¡: Push switch pressed
™: Push switch not pressed
Table 7-301
Paper size switch
sw404
sw403
sw402
sw401
SW401
SW402
SW403
SW404
A3
¡
¡
™
™
B4
¡
™
¡
™
A4
™
¡
™
™
A4R
™
¡
¡
™
B5
¡
™
™
™
B5R
¡
¡
¡
™
A5
™
™
¡
™
11 × 17
™
¡
™
¡
LGL
™
¡
¡
¡
LTR
¡
™
™
¡
LTRR
¡
™
¡
¡
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