Lexmark MX71X - Finisher Door (HPU) Undetected Service Check

Action Yes No
Step 5
Open the left cover, reseat all connectors on the stapler controller board
and then POR the machine.
Does the error remain?
Replace the stapler
controller board. See
“Stapler controller
board removal” on
page 851.
If the error persists,
then replace the
finisher option. See
“Staple, hole punch
finisher option
removal” on page
840.
The problem is solved.
Finisher door (HPU) undetected service check
Action Yes No
Step 1
a POR the machine.
b Open the rear door, and then remove all obstructions along the paper
path.
c Properly close the rear door.
Does the error remain?
Go to step 2. The problem is solved.
Step 2
Check the lower interface cable. If damaged, then replace the lower
interface cable. See
“Staple, hole punch lower interface cable removal”
on page 861.
Remove the left cover. Reseat the cable J15 on the controller board, then
POR the machine.
Does the error remain?
Go to step 3. The problem is solved.
Step 3
Do the following:
• Open, and then close the rear door. Check if the rear door closes
properly.
• Check the rear door rollers for damage.
• Remove all obstructions along the paper path.
Is the rear door functional and free of damage?
If the error persists,
then go to step 4.
Replace the finisher
option. See
“Staple,
hole punch finisher
option removal” on
page 840.
7463
Diagnostic information
329