Lexmark MS711 - Finisher (HPU) Main Motor Jam Service Check

Action Yes No
Step 16
Open the left cover, reseat all connectors on the controller PCBA and then
POR the machine.
Does the error remain?
Replace the controller
PCBA. See “Stapler
controller PCBA
removal” on page
663.
If the error persists,
then replace the staple
finisher assembly. See
“Staple finisher option
removal” on page
621.
The problem is solved.
Finisher (HPU) main motor jam service check
Action Yes No
Step 1
Check the lower interface cable. If damaged, then replace the lower
interface cable. See “Staple, hole punch lower interface cable removal”
on page 759.
Remove the left cover. Reseat the cable J15 on the controller PCBA, then
POR the machine.
Does the error remain?
Go to step 2. The problem is solved.
Step 2
Check the auto connector end of the machine below the finisher.
Is it free of damage?
Go to step 3. Replace the upper
interface cable of the
machine under the
finisher.
Step 3
Check the main motor connections. Reseat the motor cable J3 on the
controller PCBA.
Does the error remain?
Go to step 4. The problem is solved.
Step 4
Remove the three screws securing the main motor.
Note: No need to disconnect the motor cable. Just pull away the motor
to see its pinion gear.
POR the machine and check if the main motor runs.
Does the main motor run?
Go to step 6. Go to step 5.
Step 5
Do a feed test. Enter Diagnostics Menu and navigate to:
FINISHER TESTS > Feed test
Does the main motor run?
Go to step 6. Replace the stapler
main motor. See
“Stapler main motor
removal” on page
750
4063
Diagnostic information
178