Panasonic KX-FB423CN Manual page 317

KX-FB423CN
6.5.11. SENSOR SECTION
Refer to SENSORS AND SWITCHES SECTION (P.138).
Perform an SENSOR CHECK to determine if the sensor is operating correctly.
1. Check the document sensor.......... "CHECK DOCUMENT"
2. Check the paper feed sensor.......... "REMOVE DOCUMENT"
3. Check the hook switch
4. Check the cover open switch.......... "COVER OPEN"
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