Lexmark CS720 Service Manual page 91

Action
Step 4
Change the paper size or adjust the size setting in the tray.
Does the problem remain?
Step 5
Check the paper path for paper jams and obstructions.
Is the paper path free of jams and obstructions?
Step 6
Remove the jams and obstructions.
Does the problem remain?
Step 7
a
Enter the Diagnostics menu, and then navigate to:
Printer diagnostics & adjustments > Sensor tests
b
Find the sensor (Duplex path 1).
Does the sensor status change while toggling the sensor?
Step 8
Check the sensor cable for proper connection and damage, and
replace if necessary.
Does the problem remain?
Step 9
Check the sensor for damage, and replace if necessary.
Does the problem remain?
Step 10
a
Enter the Diagnostics menu, and then navigate to:
Printer diagnostics & adjustments > Motor tests >
Duplex/MPF
b
Select a setting, and then touch Start.
Does the motor run?
Step 11
Check the motor cable for proper connection and damage, and
replace if necessary.
Does the problem remain?
Diagnostic information
91
Yes No
Go to step 5. The problem is
solved.
Go to step 7. Go to step 6.
Go to step 7. The problem is
solved.
Go to step 10. Go to step 8.
Go to step 9. The problem is
solved.
Go to step 10. The problem is
solved.
Contact the next Go to step 11.
level of support.
Go to step 12. The problem is
solved.
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