Panasonic KX-FLB802CX Service Manual page 52

KX-FLB802CX/KX-FLB812CX/KX-FLB802CXS/KX-FLB812CXS
6.13.6. READ POSITION SENSOR
This sensor detects the front edge of the document.
When the front edge of the document is detected, the shelter plate closes the sensor light.
So the photo-transistor turns off and the input signal of IC604-111pin becomes high level.
When the front edge of the document is not detected, the shelter plate lets the sensor light pass.
So the photo-transistor turns on and the input signal of IC604-111pin becomes low level.
6.13.7. REGISTRATION & MANUAL PAPER SENSOR
This sensor detects whether the recording paper is at the sensor position.
When the recording paper is detected, the shelter plate lets the sensor light pass.
So the photo-transistor turns on, and input signal of IC604-112pin becomes low level.
When the recording paper is not detected, the shelter plate closes the sensor light.
So the photo-transistor turns off, and input signal of IC604-112pin becomes high level.
Photo-transistor
A document exits OFF
No document ON
Photo-transistor
Paper exits ON
No paper OFF
Signal (IC604-111pin)
High level
Low level
Signal (IC604-112pin)
Low level
High level
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