Canon DADF-H1 Service Manual page 37

CHAPTER 2 OUTLINE OF OPERATION
b. Printing of documents of different sizes adhering to different systems/Long-docu-
ment mode
The following three document detection functions are operable while printing documents
of different sizes adhering to different systems:
Function
Document presence/
absence detection
Last document detec-
tion
Document length detec-
tion
2-16
Contents
Detecting the presence or absence of a
document in the document pickup tray
Detecting whether the document being
fed is the last document or not
Detecting a document length from the
feed distance between read sensor (PI7)
ON and OFF
Document width detection is also used
to identify A5R and A4.
T02-203-02
COPYRIGHT © 2001 CANON INC.
Sensor (Symbol)
Document set sensor(PI1)
End-of-document sensor (PI1)
Read sensor (PI7)
Document width detection vari-
able resistor (VR1)
2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001