Canon np7160, np7161 Manuale Di Servizio

Pagina di 346
COPYRIGHT © 1998 CANON INC.
CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
5–7
CHAPTER 5   PICK-UP/FEEDING SYSTEM
2. Detecting the Cassette Size
The AB configuration and the Inch configuration are distinguished by the switch (SW654) on
the cassette switching PCB.
The size of the paper inside the cassette is identified with reference to the states (on/off) of
the switches (SW651 through 653) on the cassette size switch PCB.
Table 5-201 shows the combinations used to identify specific paper sizes.
0
0
0
No cassette
Result of detection
0
0
1
B5
0
1
0
A4
0
1
1
A3
1
0
0
B5R
1
0
1
B4
1
1
0
A4R
1
1
1
No cassette
0
0
0
No cassette
0
0
1
LGL
0
1
0
U2*
0
1
1
LDR
1
0
0
LTR
1
0
1
LTR-R
1
1
0
U1*
1
1
1
No cassette
*Non-AB/Inch configuration sizes may be registered
 (default sizes only) in service mode [5].
SW653
SW652
SW651
Result of detection
•AB size (SW654=0)
•Inch size (SW654=1)
SW653
SW652
SW651
Table 5-201
SW652
SW651
SW653
SW654
Cassette size switch PCB
Figure 5-208
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