Identifying The Cassette Size - Canon NP6218 Service Manual

CHAPTER 5 PICK-UP/FEEDING SYSTEM
V. IDENTIFYING THE CASSETTE SIZE
When a cassette is set in the cassette holder, appropriate photointerrupters (Q651,
Q652, Q653, Q654) turn on or off.
The microprocessor on the DC controller PCB identifies the presence/absence of a
cassette based on the combinations of the photointerrupters which are either on or off
(Table 5-501); accordingly, the microprocessor controls where the scanner must be
reversed or when to execute blank exposure.
Arrangement
Cassette size
No cassette
B5R (182 257)
A4 (297 220)
A3 (297 420)
Mini (STMTR) 5.5"
(148 216)
Legal 8.5" 14"
(356 216)
Letter 11" 8.5"
(279 216)
A4R (210 297)
Letter R 8.5" 11"
(216 279)
A5R (149 218)
A5 (218 149)
Mini-R (STMT) 8.5"
(216 148)
B5 (257 182)
B4 (364 257)
Ledger 11" 17"
(182 257)
*U
(182 ~ 283 198 ~ 354)
1: photointerrupter is blocking light.
0: photointerrupter is not blocking light.
*size may be stored; must be within the range specified in mm; for details, see p. 10-
43.
5-10
Q651
(Left)
0
0
0
0
8.5" 0
0
0
0
1
1
1
5.5" 1
1
1
1
1
COPYRIGHT © 1997 CANON INC.
Q652
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Table 5-501
CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Q653 Q654
(right)
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
(unit: mm)