Lexmark CS720 Service Manual page 190

Action
Step 6
Reconnect the cable.
Does the problem remain?
Step 7
Check the cable for damage, and replace if necessary.
Does the problem remain?
Step 8
Replace the motor. See
page 309.
Does the problem remain?
Step 9
Replace the controller board. See
page 357.
Does the problem remain?
Motor (deskew) 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 > Deskew
b
Touch Start.
Does the motor run?
Step 3
Turn the aligner and registration rollers.
Is there binding or uneven movement when turning the rollers?
Step 4
Check the aligner roller gears for damage, and replace if
necessary.
Does the problem remain?
"Motor (black only retract) removal" on
"Controller board removal" on
Diagnostic information
Yes
Go to step 7.
Go to step 8.
Go to step 9.
Contact the next
level of support.
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
190
5028
No
The problem is
solved.
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.