Panasonic KX-MB283BR Service Manual page 38

KX-MB283BR
6.10.3. EXIT SENSOR
This sensor detects whether the recording paper exits or not.
When there is a recording paper at the position of the sensor, the input signal of IC300-AD20pin becomes low level.
When there is no recording paper at the position of the sensor, the input signal of IC300-AD20pin becomes high level.
HOME SENSOR is not arranged.
Home position is detected by CIS finding the special bar code pattern back side of the FB cabinet.
6.10.4. 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 IC300-AD22pin 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 IC300-1AD22pin becomes low level.
A paper exists
No papers
Photo-transistor
A document exists OFF
No document ON
Signal (IC300-AD20pin)
Low level
High level
Signal (IC300-AD22pin)
High level
Low level
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