Action Yes No
Step 5
Perform a print test and check the redrive motor assembly for
proper operation. If necessary, replace the redrive motor assembly.
See
“Redrive assembly removal” on page 331.
Does the problem remain?
Go to step 6. Problem is solved.
Step 6
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 7. Problem is solved.
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.
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?
Go to step 8. Problem is solved.
Step 8
Remove obstructions in the external duplex media path.
Does the problem remain?
Go to step 9. Problem is solved.
Step 9
Remove, and then properly reinstall the external duplex unit
assembly.
Does the problem remain?
Go to step 10. Problem is solved.
4062
Diagnostic information
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