Panasonic KX-FP81BX Service Manual page 152

KX-FP81BX / KX-FP81CX / KX-FP82CX
1. [Document top SW (SW353)]
When a document is brought to the read position, the SW becomes ON, and the input signal of IC301-16 pin (Operation)
becomes a low level. When there is no document at the read position, the SW becomes OFF, and the input signal of IC301-16
pin (Operation) becomes a high level.
2. [Document Set (SW352)]
When a document is set, the SW becomes ON, and the input signal of IC301-15 pin (Operation) becomes a low level. When
there is no document, the SW becomes ON, and the input signal of IC301-15 pin (Operation) becomes a high level.
Out of the Read Position
At the Read Position
No document
Set document
Operation Board
Photo transistor Signal (IC301-16 pin)
OFF High level
ON
Operation Board
Photo transistor Signal (IC301-15 pin)
OFF High level
ON
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Low level
Low level