Panasonic KX-FLB758RU Service Manual page 189

7.9.6. TOP COVER OPEN SWITCH...."COVER OPEN"
The Switches detect whether the printer cover is open or closed.
When the printer cover is closed, the switches turn ON, and the input signal of IC604-U4 pin becomes a high level.
When the printer cover is open, the switches turns OFF, and the input signal of IC604-U4 pin becomes a low level.
7.9.7. DRUM SENSOR...."CHECK DRUM"
The Switch detects whether the DRUM unit is set or not.
When there is the DRUM unit, the input signal of IC604-V1 pin becomes a low level.
When there is no DRUM unit, the input signal of IC604-V1 pin becomes a high level.
Switch
Open OFF
Close ON
DRUM Set
No DRUM
189
Signal (IC604-U4 pin)
Low level
High level
Signal (IC604-V1 pin)
Low level
High level
KX-FLB758RU