Oce 3121 Technical & Service Manual page 702

The supply to the stapling motor will be interrupted if any of these sensors
open.
Stapler assembly cover
open/closed sensor
Stapler home position
sensor
Stapler safety sensor
Stapling motor
Sensor MS6 opens when the actuator in the stapler is raised. Gap A for the
movement of the actuator is 4.5 to 5.8 mm.
Warning:
552 TSM Océ 3121
MS5
C NO
MS4
NO C
MS6
C NO
M3
MS6 will not operate when the cover is removed from the stapler.
Stapler safety sensor (MS6)
Tray controller PCB
24V
J17-1
-2
-3
-4
Actuator
A
Stapler
Functional description of the sorter