Action Yes No
Step 7
a Make sure that the sensor is properly installed.
b Make sure that the sensor is free of debris or dust.
c Reseat the cable on the sensor.
d Check the cable for damage, and replace if necessary. See “HPT cable
removal” on page 325.
Does the problem remain?
Go to step 8. The problem is solved.
Step 8
Replace the sensor. See
“Sensor (HPT feed)” on page 322.
Does the problem remain?
Go to step 9. The problem is solved.
Step 9
a Remove the rear cover.
b Test the motor (HPT transport).
Enter the Diagnostics menu, and then navigate to:
MOTOR TESTS > Staple, Hole Punch Finisher Motor Tests > HTU
transport
c Check if the belts, gears, and rollers are properly moving.
Are they properly moving?
Go to step 11. Go to step 10.
Step 10
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 (HPT transport) removal” on page 327 and “HPT cable
removal” on page 325.
Does the problem remain?
Go to step 11. The problem is solved.
Step 11
a Make sure that the transport rollers are properly installed.
b Make sure that the rollers are free of debris or dust.
c Check the rollers for wear or damage, and replace if necessary. See
“HPT transport rollers removal” on page 329.
Does the problem remain?
Go to step 12. The problem is solved.
Step 12
a Make sure that the transport belts and gears are properly installed.
b Check the belts and gears for wear or damage, and replace if
necessary. See
“HPT belts and gears removal” on page 329.
Does the problem remain?
Go to step 13. The problem is solved.
4021, 7421
Diagnostic information
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