Sensor Input - Oki S900 Service Manual

S900

4.2.5 SENSOR INPUT

The sensor input includes home position sensor, Hall effect sensor, and paper size sensor.
(1) Home position sensor
The home position of the carrier motor is detected by photo sensor. The photo
transistor transmission to the photo sensor receiver circuit is shown below.
Figure 5.3 Home position sensor
The home position is detected when the carrier passes between the LED and the phototransistor.
(3) Hall effect sensor
The switch status of the document cover is detected by Hall effect sensor.
Figure 5.4 Hall effect sensor
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