Lexmark CS720 Service Manual page 115

Action
Step 3
a
Enter the Diagnostics menu, and then navigate to:
Printer diagnostics & adjustments > Sensor tests
b
Find the sensor (MPF/pass‑through).
Does the sensor status change while toggling the sensor?
Step 4
Check the sensor cable for proper connection and damage, and
replace if necessary.
Does the problem remain?
Step 5
a
Check the isolation unit for damage, and replace if necessary.
See "Isolation unit removal" on page
b
Perform a print job.
Does the problem remain?
Motor (duplex/MPF) jam service check
Action
Step 1
Check if this is a duplex issue.
Is this a duplex issue?
Step 2
Check the MPF tray for overfilling.
Is the tray overfilled?
Step 3
Remove the excess paper from the tray.
Does the problem remain?
Step 4
Check the paper condition in the MPF tray.
Is the paper crumpled or damaged?
Step 5
Replace the crumpled or damaged paper.
Does the problem remain?
371.
Diagnostic information
115
Yes No
Contact the next Go to step 4.
level of support.
Go to step 5. The problem is
solved.
Contact the next The problem is
level of support. solved.
Yes No
Go to step 6. Go to step 2.
Go to step 3. Go to step 4.
Go to step 4. The problem is
solved.
Go to step 5. Go to step 6.
Go to step 6. The problem is
solved.
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