Panasonic KX-FLB852CX Service Manual page 250

KX-FLB852CX / KX-FLB852CXS
7.12.21. OPTION CASSETTE PICKUP SENSOR
This switch detects whether a recording paper is picked up from option cassette.
When there is a recording paper at the position of the switch, the input signal of IC604-89pin becomes low level.
When there is no recording paper at the position of the switch, the input signal of IC604-89pin becomes high level.
Signal (IC604-89pin)
Paper exist Low level
No paper High level
7.12.22. OPTION CASSETTE PAPER TRAY SENSOR
This switch detects whether the paper tray #3 is set or not.
When the paper tray is set and side cover of option cassette is closed, the signal of IC600-P17pin becomes low level.
When the paper tray is not set, the signal of IC600-P17pin becomes high level.
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