Action Yes No
Step 4
a Test the sensors along the paper path.
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > Staple and Hole Punch Finisher Sensor Tests > select
the sensor
b Toggle the sensor.
Does the sensor status change while toggling the sensor?
Go to step 7. Go to step 5.
Step 5
a Make sure that the sensors are properly installed.
b Make sure that the sensors are free of debris or dust.
c Reseat the cable on the sensors. Check the cables for damage, and
replace if necessary.
d Check the sensors for damage.
Are the sensors free of damage?
Go to step 7. Go to step 6.
Step 6
Replace the damaged sensors.
Does the problem remain?
Go to step 7. The problem is solved.
Step 7
a Reseat the sensor cables on the SHPF controller board.
b If applicable, reseat the junction connectors on the cables.
c Make sure that the cables do not block the path of moving parts.
d Check the cables for damage, and replace if necessary.
Does the problem remain?
Go to step 8. The problem is solved.
Step 8
a Reseat the interface cable on the SHPF controller board and printer.
b Reseat the junction connector on the cable.
c Check the cable for damage, and replace if necessary.
Does the problem remain?
Go to step 9. The problem is solved.
Step 9
a Reseat all the cables on the SHPF controller board.
b Reset the printer.
Does the problem remain?
Go to step 10. The problem is solved.
Step 10
Replace the controller board.
Does the problem remain?
Contact the next level
of support.
The problem is solved.
4021, 7421
Diagnostic information
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