Panasonic KX-F900 Service Manual page 145

KX-F900 1
[Document Sensor (PI302)]
When a document is set, the shelter plate shuts the sensor ligh, the phototransist or becomes OFF, and the input signal
of IC301-15 pin (Operation) becomes high level. When there is no document, the shelter plate passes the sensor light, the
pt_ototTa_s'ts_.or becomes ON, and the input signal of IC301-15 pin (Operation) becomes low level.
(When checking this sensor condition, IC301-9 pin becomes low level.)
SHELTER PLATE
+5V
15
9
................. =
R332
IC301
XLD12
_LED10
Analog, Digital and Operation Board
Phototransistor
No document ON
Set document OFF
Signal (IC301-15 Pin)
Low level
High level
_.9
30
O
C
"-4
O
"1o
m
::o
_>
-I
O
z
-145-