Panasonic KX-FT21RS manual Read Position Sensor PS2, Document Sensor PS1, 121

KX-FT21RS

6.5.3.Read Position Sensor (PS2)

When a document is brought to the read position, the shelter plate passes the sensor light, the photo transistor becomes ON, and the input signal of the CN2-3 pin (Operation) becomes a low level. When there is no document at the read position, the shelter plate closes the sensor light, the photo transistor becomes OFF, and the input signal of the CN2-3 pin (Operation) becomes a high level. (When checking this sensor, CN1-8 pin, 2pin becomes low level).

Operation Board

	Photo transistor	Signal (CN2-3	Pin)
Out of the Read Position	OFF	High level
At the Read Position	ON	Low level

6.5.4.Document Sensor (PS1)

When a document is set, the shelter plate closes the sensor light, the photo transistor becomes OFF, and the input signal of the CN2-3 pin (Operation) becomes a high level. When there is no document, the shelter plate passes the sensor light, the photo transistor becomes ON, and the input signal of the CN2-3 pin (Operation) becomes a low level.

(When checking this sensor, the CN1-8 pin, 3pin becomes a low level.)

Operation Board

	Photo transistor	Signal (CN2-3	Pin)
No document	ON	Low level
Set document	OFF	High level

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