Action Yes No
Step 9
a Make sure the belts and gears connected to the motor and roller are
properly installed.
b Check the belts and gears for wear or damage, and replace if
necessary.
Does the problem remain?
Go to step 10. The problem is solved.
Step 10
a Remove the upper exit roller assembly. See “Staple finisher upper exit
roller assembly removal” on page 305.
b Make sure that the parts are properly installed.
c Check the parts for wear or damage, and replace if necessary.
Does the problem remain?
Go to step 11. The problem is solved.
Step 11
a Make sure that the bin stack height solenoid is properly installed.
b Check the solenoid for damage, and replace if necessary. See “Staple
finisher bin stack height solenoid removal” on page 235.
Does the problem remain?
Go to step 12. The problem is solved.
Step 12
a Reseat the interface cable on the staple finisher 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 13. The problem is solved.
Step 13
a Reseat all the cables on the staple finisher controller board.
b Reset the printer.
Does the problem remain?
Go to step 14. The problem is solved.
Step 14
Replace the controller board. See
“Staple finisher controller board
removal” on page 244.
Does the problem remain?
Contact the next level
of support.
The problem is solved.
4021, 7421
Diagnostic information
156
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