Lexmark MS711 - Page 181

Action Yes No
Step 4
a Open the rear door and check the sensor (trailing edge) and sensor
(leading edge):
• Check the sensor flag for damage. If damaged, then replace the
finisher. See “Staple, hole punch finisher option removal” on
page 738.
• Make sure the sensor is aligned and properly seated.
b Do a sensor test. Enter Diagnostics Menu and navigate to :
FINISHER TESTS > Finisher Sensor Test > Pass and Media
Does the display on the operator panel change every time the sensing
area of the sensor tested is interrupted or blocked?
Go to step 5. Replace the finisher.
See “Staple, hole
punch finisher option
removal” on page
738.
Step 5
Open the rear door, and check:
• if the rear door opens and closes properly
• the rollers for damage
Are the rear door components functional and free of damage?
Go to step 6. Replace the finisher.
See “Staple, hole
punch finisher option
removal” on page
738
Step 6
a Open the rear door. Check the upper and lower rollers on the finisher
side for damage.
b Open the left cover. Reseat the cable J22 on the HPU controller PCBA.
c Check the paper path gears for damage.
Note: To access the gears, remove the four screws from the HPU
controller PCBA (no need to remove the PCBA, just move it out of
the way), and then remove the screws securing the grounding plate.
The gears are found under the grounding plate.
Are the paper path components free of damage?
If the error persists,
then go to step 6.
Replace the finisher
option. See “Staple,
hole punch finisher
option removal” on
page 738.
Step 7
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 8. Replace the stapler
drive gear assembly.
See “Stapler drive gear
assembly removal” on
page 755.
Step 8
Check the main motor connections. Reseat the motor cable J3 on the
controller PCBA.
Does the error remain?
Go to step 9. The problem is solved.
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Diagnostic information
181