Panasonic KX-FLB758RU Service Manual page 191

7.9.9. PAPER SENSOR..... "OUT OF PAPER"
The Sensor detects the recording paper are in place.
When the recording paper is detected, the shelter plate let the sensor light passing through, the photo-transistor turns ON, and the
input signal of IC610-121 pin becomes a low level.
When there is no recording paper, the shelter plate closes the sensor light, the photo-transistor turns OFF, and the input signal of
IC610-121 pin becomes a high level.
[Paper Sensor]
7.9.10. PAPER EXIT SENSOR..... "PAPER JAMMED"
The sensor detects whether the recording paper exit out or noy.
When there is no recording paper at the position of the sensor, the shelter plate closes the sensor light, the photo-transistor fot
tarus OFF, and the input signal of IC610-120pin becomes high level.
When the recording paper reach the exit sensor, the shelter plate let the sensor light passing through, the photo-transistor ON, and
the input signal of IC610-120pin becomes a low level.
[Exit Sensor]
Photo-transistor
Recording Paper Set
No Recording Paper
Photo-transistor
No Paper
Paper Exist
Signal (IC606-178 pin)
OFF High level
ON Low level
Signal (IC606-179 pin)
OFF High level
ON Low level
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KX-FLB758RU