Canon Color imageRUNNER C4580 Service Manual - page 181
Chapter 6
6-14
T-6-5
Note:
Changes in the Signal (from ADF open to close)
change: no
other: yes
The machine uses OR combinations for identification.
2. Priority on the Front Sensors
When checking the measurements for main scanning direction, if the absence of an original is indicated at
the rear while the presence of an original is indicated at the front, the machine will give priority to the
indication at the front (i.e., presence of an original).
F-6-19
T-6-6
Result of measurement
Result of detection
A
B
no
no
original absent
yes
yes
original present
no
yes
original present
yes
yes
original present
Point of detection
yes/no
Size identified
1
yes
yes
2
no
yes
3
yes
yes
4
no
no
Result
B5
Document size
sensor 1
CCD original detection position
Point of detection 1
Point of detection 4
Point of detection 3
Point of detection 2
B5