CHAPTER 5 PICK-UP/FEEDING SYSTEMCOPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)5-4C. Identifying the Paper SizeThe presence/absence of a cassette in the cassette holder and the size thereof are identified byfour switches (CST1 through CST4) provided in the cassette holder. Based on the combinations ofthe switches which have been actuated, the microprocessor recognizes the presence/absence of acassette as shown in Tables 5-101 and 5-102 and, at the same time, determines where to reverse thescanner and how to control the blank shutter.Table 5-101In case of the universal cassette (U), the cassette size is selected by service mode No. 23 ac-cording to Table 5-102:Table 5-102Service 23 Size0 B41 B52 B5R3 LETTER4 LETTER R5 LEGAL6 STMT R0: SW is OFF1: SW is ONcst1 cst2 cst3 cst4NO cassette 0 0 0 0A4 1 0 0 0A3 1 1 0 0A4R 1 1 1 0A5R 1 1 1 1Universal 0 1 1 1
