Canon Color imageRUNNER C4580 Service Manual - page 183
Chapter 6
6-16
F-6-23
4) ADF Cover Fully Closed (5 deg or less).
The machine checks for a change in the output levels of the sensors for 2 sec after the ADF open/closed sensor
has identified the ADF as being "closed"; the machine assumes the absence of an original at points without
a change.
The machine then identifies the size of the original based on the combination of changes at 5 points.
F-6-24
5) Standby (in wait for a press on the Start key)
No. 1 mirror base: at point of original detection
xenon lamp: off
original sensor: off
F-6-25
F-6-26
25
5
1
A B
2
A B
3
A B
4
A B
1
A B
2
A B
3
A B
Original
size
A3
B4
A4R
A4
B5
B5R
A5
B6
absent
Original
sensor 1
Point of CCD
detection
AB-Configuration
Original
size
11"x17"
LGL
LTRR
LTR
STMTR
STMT
absent
Point of CCD
detection
Inch-configuration
:unchanged
:changed
Original
sensor 3