Action Yes No
Step 2
Enter the Diagnostics menu, and then navigate to:
Printer setup > Reset engine service error
Note: Perform this step every time a service error occurs.
Does the problem remain?
Go to step 3. The problem is solved.
Step 3
a Remove the top inner cover.
b Bypass the front door switch.
c Test the motor (SHPF aligner).
Enter the Diagnostics menu, and then navigate to:
MOTOR TESTS > Staple and Hole Punch Finisher Motor Tests >
Trailing edge stopper
d Check if the belts, gears, and rollers are properly moving.
Are they properly moving?
Go to step 5. Go to step 4.
Step 4
a Reseat the cable on the motor.
b Make sure that the motor is properly installed.
c Check the motor and cable for damage, and replace if necessary. See
“Motor (SHPF aligner) removal” on page 391.
Does the problem remain?
Go to step 5. The problem is solved.
Step 5
a Make sure that the sensor (SHPF aligner position) 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 Test
b Toggle 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 aligner position) removal” on
page 414.
Does the problem remain?
Go to step 8. The problem is solved.
4021, 7421
Diagnostic information
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