Lexmark T652 Service Manual page 103

Action
Step 3
Check if the display on the operator panel changes every time the
sensing area of the media tray sensor (duplex input) is interrupted
or blocked.
a
Enter the diagnostic mode.
b
Select Duplex tests.
c
Select Sensor test.
d
Observe the line item "input."
If necessary, replace the connection or the sensor (duplex input).
See "Sensor (duplex input) removal (T652, T654, T656)" on
page 340.
Does the problem remain?
Step 4
Remove obstructions in the aligner assembly.
Does the problem remain?
Step 5
Remove obstructions in the external duplex media path.
Does the problem remain?
Step 6
Remove, then properly reinstall the external duplex unit assembly.
Does the problem remain?
Step 7
Check if the display on the operator panel changes every time the
sensing area of the media tray sensor (duplex input) is interrupted
or blocked.
a
Enter the diagnostic mode.
b
Select Duplex tests.
c
Select Sensor test.
d
Observe the line item "input."
If necessary, replace the connection or the external duplex
assembly.
Does the problem remain?
Step 8
Perform a print test using the duplex.
Does the problem remain?
Diagnostic information
103
Yes No
Go to step 4. Problem is solved.
Go to step 5. Problem is solved.
Go to step 6. Problem is solved.
Go to step 7. Problem is solved.
Go to step 8. Problem is solved.
Contact next level of Problem is solved.
support.
4062