Sensor Input - Xerox DocuMate 252 Service Manual

3.2.5 Sensor input

A. Photo_Sensor
The sensor input includes paper in/out sensor.
Paper In/Out sensor
The paper position is detected by photo sensor. The photo transistor transmission
to the photo sensor receiver circuit is shown below.
The paper in/out sensor is detected when the paper passes between the LED and the
photo transistor.
B. IR-Sensor
Figure 3.3 Paper in/out sensor
+5V +5V
DAC
Figure 3.4 IR_Sensor
3-7
Service Manual
Out
Out
+
_
-
(OP
)