Action Yes No
Step 6
a Test the sensor.
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > Staple and Hole Punch Finisher Sensor Tests >
Tamper home, front
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 front tamper home) removal ” on
page 355.
Does the problem remain?
Go to step 8. The problem is solved.
Step 8
a Remove the SHPF compiler assembly, and then separate the front
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 J4 and J5 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.
Step 10
a Reseat the interface cable on the SHPF controller board and printer
controller board.
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 11. The problem is solved.
Step 11
a Reseat all the cables on the SHPF controller board.
b Reset the printer.
Does the problem remain?
Go to step 12. The problem is solved.
4021, 7421
Diagnostic information
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