Lexmark MX71x Service Manual page 194

Action
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 board.
c
Check the paper path gears for damage.
Note: To access the gears, remove the four screws from the HPU
controller board (no need to remove the board, 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?
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?
Step 8
Check the main motor connections. Reseat the motor cable J3 on the
controller board.
Does the error remain?
Step 9
Remove the three screws securing the main motor. POR the machine and
check if the main motor runs.
Does the main motor run?
Step 10
Do a feed test. Enter Diagnostics Menu and navigate to:
FINISHER TESTS > Feed test
Does the main motor run?
Step 11
Open the top cover and do the following:
a
Check the left media stack flap for damage.
b
Make sure the left media stack flap is properly seated and aligned.
c
Check if the left media stack flap has no problem moving.
Is the left media stack flap functional and free of damage?
Yes
If the error persists,
then go to step 6.
Go to step 8.
Go to step 9.
Go to step 13.
Go to step 11.
Go to step 12.
Diagnostic information
194
7463
No
Replace the finisher
option. See "Staple,
hole punch finisher
option removal" on
page 840.
Replace the stapler
drive gear assembly.
See "Stapler drive gear
assembly removal" on
page 857.
The problem is solved.
Go to step 10.
Replace the stapler
main motor. See
"Stapler main motor
removal" on page
852.
Replace the finisher.
See "Staple, hole
punch finisher option
removal" on page
840.