Sharp SF-S55N Service Manual page 106

5) Rocking stop position sensor (MSW2)
When the stapler unit comes to the specified position
when it performs rocking operation, the rocking stop
position sensor is turned on. When the rocking stop
position sensor is turned on, the drive power (24V) for
the staple motor (M2) is supplied, so that stapling
operation may be performed.
Not in stapling position
In stapling position
Rocking stop
position switch
(MSW2)
Paper
Rocking stop
position switch
(MSW2)
9−36
SF-S55N