Panasonic KX-FP701ME Service Manual page 34

KX-FP701ME
6.5.3. PAPER TOP SENSOR (PS401)
When the recording paper is loaded on the print head, the shelter plate shuts the sensor light, and the photo transistor turns OFF.
The input signal of IC5-65 pin becomes a high level. Usually, the shelter plate is lifted, the photo transistor turns ON, and the input
signal of IC1-102 pin becomes a low level.
Recording paper top
No recording paper
6.5.4. Cover Open Sensor (SW502)
When the u-TURN BLOCK is closed, the SW becomes ON, and the input signal of IC1-131 pin (Digital Board) becomes a low level.
When the cover is opened, the SW becomes OFF, and the input signal of IC1-131 (Digital Board) pin becomes a high level.
Cover is opened
Cover is closed
Photo transistor Signal (IC1-19 pin)
OFF High level
ON Low level
SW Signal (IC5-66 pin)
OFF
ON
34
High level
Low level