Canon D2, Руководство по обслуживанию

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2
2
2-8
2-8
Technology > Controls (Reader)
Technology > Controls (Reader)
（
External
light
）
25
°
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
°
5) Standby status (waiting for start key)
CCD unit: in original detection position
LED: OFF
Original sensor: OFF
F-2-14
F-2-15
F-2-16
F-2-17
■
Dirt Sensor Control
● Overview
The machine changes the original read point or executes image correction depending on
the presence/absence of dust on the stream reading glass or the platen roller of the ADF to
prevent the dust from showing up in the output. These operations are carried out only when
the ADF is in use and, in addition, is closed.
[Control timing]
- At the end of a job
- Between sheets (for each reading of a sheet)
- At the start of a job (only when any of the following conditions is true.)
Dust detected at all points of detection at the end of the previous job
Dust detection failed to end normally at the end of the previous job (e.g., ADF opened)
Main power
switch
ON
Dust detection
control
STBY WMUP
Start key
ON
1st
SCAN 2nd
SCAN
Dust detection
control
Dust detection
control
F-2-18