Panasonic KX-F1200 Service Manual And Technical Manual page 114

KX-F 1200 j
[Read Position Sensor (PI301)]
When an document is brought to read position, the shelter plate shuts the sensor light, the phototransistor becomes OFF,
and the input signal of IC301-15 pin (Operation) becomes high level. When there is no document at the read position, the
shelter plate passes the sensor light, the phototransistor becomes ON, and the input signal of IC301-15 pin (Operation) be-
comes low level.
+5V
PLATE
+5V
i \
Z I____- 7
iR373
"--1
PI301
IC301
15
XLED 12
2
LED 6
LED POWER CONTROL
Low: Enable High: Disable
Operation Board
Phototransistor Signal (IC301-15 pin)
Out of the Read Position ON Low level
At the Read Position OFF High level
[Document Sensor (PI302)]
When a document is seen, the shelter plate shuts the sensor light, the phototransistor becomes OFF, and the input signal of
IC301-19 pin (Operation) becomes high level. When there is no document, the shelter plate passes the sensor light, the
phototransistor becomes ON, and the input signal of IC301-19 pin (Operation) becomes low level.
+5V
Q303
SHELTER PLATE
+5V
IC301
19
XLED 13
2
LED 6
\
LED POWER CONTROL
Low: Enable High: Disable
Operation Board
No Document
Set Document
Phototransistor
ON
OFF
I Signal (IC301-19 pin)
Low level
High level
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