COPYRIGHT © 1999 CANON INC.
CANON ADF FOR iR600 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
2-17
CHAPTER 2 OPERATIONS
Figure 2-211a
Table 2-205 States of Switches
4.
Original Size Detection 2
a. Outline
The function referred to as "original detection 2" relies on the original width detecting switch
(SW301) and the registration roller clock sensor (PI5), and is used to find out the size of an original in
terms of several default sizes.
The original width detecting switch detects the "width of an original." As many as five contact
plates (SSW0 through 4) operating in conjunction with the slide guide are in contact with the original
width detecting switch, and information indicating the combination of states (ON or OFF) of the
contact plates is sent to the ADF controller PCB, which will in response identify the width of the
original. The table that follows show the state of each contact plate in relation to default sizes; combi-
nations other than shown will be assumed to represent a non-default size.
Slide guide
ADF controller PCB
ON/OFF
Original width detecting
switch (SW301)
Default size
A5, A4R
A4, A3
B5R
B5, B4
STMT, LTRR, LGL
LTR, 279.4×431.8mm (11"×17")
SSW0
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
SSW1
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
SSW2
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
ON
SSW3
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
SSW4
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
OFF
OFF