Canon H1 Service Manual page 22

Color image reader unit
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2
Technology > Controls (Reader)
checks the reflection light (4 points). For sub scanning direction, original sensor
detects the size.
(External
light)
25 deg
4) ADF fully closed (5 deg or less)
CCD unit: in original detection position
LED: ON
Original sensor: in original detection operation
• For 2 sec from the original mount sensor (front) detected [close], this monitors the
changes of output level of each sensor. The machine determines that the original is
present in the position where the level is not changed.
The machine identifies the original size by the combination of level changes at 5 points
(in case of AB type size).
5 deg
5) Standby status (waiting for start key)
CCD unit: in original detection position
LED: OFF
2
Technology > Controls (Reader)
Original sensor: OFF
F-2-13
F-2-14
F-2-15
2-9
F-2-16
2-9

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