Lexmark CS720 Service Manual page 192

Action
Step 4
Replace the motor. See
Does the problem remain?
Step 5
Reset the printer.
Does the problem remain?
Step 6
Replace the controller board. See
page 357.
Does the problem remain?
Motor (duplex/MPF) service check
Action
Step 1
Reset the printer.
Does the problem remain?
Step 2
a
Enter the Diagnostics menu, and then navigate to:
Printer diagnostics & adjustments > Motor tests >
Duplex/MPF
b
Touch Start.
Does the motor run?
Step 3
Open the front door, and then manually turn the duplex/MPF drive
gears.
Is there binding in the gears?
Step 4
Replace the motor. See
page 315.
Does the problem remain?
Step 5
Check the motor cable for proper connection and damage, and
replace if necessary.
Does the problem remain?
"Motor (output) removal" on page
"Controller board removal" on
"Motor (duplex/MPF) removal" on
Diagnostic information
Yes
Go to step 5.
297.
Go to step 6.
Contact the next
level of support.
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
192
5028
No
The problem is
solved.
The problem is
solved.
The problem is
solved.
No
The problem is
solved.
Go to step 5.
Go to step 5.
The problem is
solved.
The problem is
solved.