Lexmark T652 - Page 70

Action Yes No
Step 13
Perform a print test and check the duplex drive motor assembly for
proper operation. If necessary, replace the duplex drive motor
assembly. See
“T652, T654, and T656 duplex drive motor
assembly removal” on page 328.
Does the problem remain?
Go to step 18. Problem is solved.
Step 14
Make sure the media originate from the external duplex.
Does the problem remain?
Go to step 15. Problem is solved.
Step 15
Make sure that the display on the operator panel changes every
time the sensing area of the 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 external duplex assembly.
Does the problem remain?
Go to step 16. Problem is solved.
Step 16
Make sure that the display on the operator panel changes every
time the sensing area of the sensor (duplex exit) is interrupted or
blocked.
a Enter the diagnostic mode.
b Select Duplex tests.
c Select sensor test.
d Observe the line item “exit.”
If necessary, replace the external duplex assembly.
Does the problem remain?
Go to step 18. Problem is solved.
Step 17
Check the two pick roll assemblies in the media tray being picked
from. If necessary, clean or replace the pick roll assembly. See
“Pick roll assembly removal” on page 322.
Does the problem remain?
Go to step 18. Problem is solved.
Step 18
Remove obstructions in the aligner assembly.
Does the problem remain?
Go to step 19. Problem is solved.
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Diagnostic information
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