Lexmark MS711 - Page 167

Action Yes No
Step 3
Check the auto connector end of the option previously installed below the
staple finisher.
Is it free of damage?
Go to step 4. Replace the upper
interface cable of the
output option
previously installed
under the staple
finisher.
Step 4
Check the lower interface cable. If damaged, then replace the lower
interface cable. See “Stapler lower interface cable removal” on
page 661.
Remove the left cover. Reseat the cable J15 on the controller PCBA, then
POR the machine.
Does the error remain?
Go to step 5. The problem is solved.
Step 5
Check the main motor connections. Reseat the motor cable J3 on the
controller PCBA.
Does the error remain?
Go to step 6. The problem is solved.
Step 6
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 8. Go to step 7.
Step 7
Do a feed test. Enter Diagnostics Menu and navigate to:
FINISHER TESTS > Feed test
Does the main motor run?
Go to step 8. Replace the stapler
main motor. See
“Stapler main motor
removal” on page
664
Step 8
Check the drive gear assembly mechanism:
• Remove the finisher option from the printer. From the bottom of the
option, turn the lowermost drive gear clockwise. Make sure the rollers
engaged to the lowermost gear will also turn.
• Check the drive gear assembly for damage.
Is the drive gear assembly functional and free of damage?
Go to step 9. Replace the stapler
drive gear assembly.
See “Stapler drive gear
assembly removal” on
page 668.
4063
Diagnostic information
167