Canon iR2018 Series, Service Manual

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Chapter 4
4-10
1) Standby state
Original sensor: Turns off.
F-4-16
2) The copyboard cover opens (at an angle of more than 30o).
Original sensor: Turns off.
F-4-17
3) The copyboard cover is closed (at an angle of 30 deg).
Original sensor: Turns on and original size identification process 1 is performed.
F-4-18
4) The copyboard cover is closed (at an angle of more than 5 deg but less than 30 deg)
Original sensor: Turns on and original size identification process 2 is performed.
F-4-19
5) The original cover is closed (at an angle of 5 deg or less)
The original size is identified.
Original sensor: Turns off.
In identifying the original size, the data obtained in the original size identification process 1 is compared with the data obtained in the original size identification
process 2 to check whether these two pieces of data are identical.
Note that a wrong original size may be identified because the sensor output level does not change in the following cases:
- When the original is A3-sized black
- When the original is a book (its thickness does not allow the copyboard cover to close fully, making it difficult to detect the sensor level change).
- When the copyboard cover is not closed fully (the sensor level change is not detected after lapse of the above time-out time)
F-4-20
Reader unit
Copyboard cover
Original sensor 3
Copyboard glass
Original sensor 4
Original sensor 2
Original sensor 1
Original sensor 3
Original sensor 4
Original sensor 2
Original sensor 1
30
Original sensor 2
Original sensor 1
Original (A4R)
Original sensor 3/4
Original sensor 1/2
Original sensor 4
Original sensor 3
5
Original sensor 2
Original sensor 1
Original (A4R)
Original sensor 3/4 Original sensor 1/2
Original sensor 4
Original sensor 3
Change absent
Change present
Original sensor 2
Original sensor 1
Original (A4R)
Original sensor 4
Original sensor 3