Action Yes No
Step 5
a Make sure that the sensor (SHPF rear tamper home) is properly
installed.
b Make sure that the sensor is free of debris or dust.
c Reseat the cable on the sensor. Check the cable for damage, and
replace if necessary.
d Check the sensor for damage.
Is the sensor free of damage?
Go to step 6. Go to step 7.
Step 6
a Test the sensor.
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > Staple and Hole Punch Finisher Sensor Tests
b Move the tamper to the sensor.
Does the sensor status change while toggling the sensor?
Go to step 8. Go to step 7.
Step 7
Replace the sensor. See
“Sensor (SHPF rear tamper home) removal” on
page 359.
Does the problem remain?
Go to step 8. The problem is solved.
Step 8
a Remove the SHPF compiler assembly, and then separate the rear
tamper section.
b Make sure that the tamper belts and gears are properly installed.
c Make sure that the spring is attached to the belt.
d Check the belts and gears for wear or damage, and replace if
necessary. See
“SHPF—Compiler section 3” on page 599.
Does the problem remain?
Go to step 9. The problem is solved.
Step 9
a Reseat the cables J9, J12, and J13 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 10. The problem is solved.
4021, 7421
Diagnostic information
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