Action Yes No
Step 5
a Remove the duplex/MPF tray. See “Duplex/MPF tray removal”
on page 434.
b Enter the Diagnostics menu, and then navigate to:
Printer diagnostics and adjustments > Sensor tests
c Find the sensor (Duplex path).
Does the sensor status change while toggling the sensor?
Go to step 9. Go to step 6.
Step 6
a Remove the right cover. See “Right cover removal” on
page 420.
b Check the sensor cable J27 on the controller board for proper
connection.
Is the cable properly connected?
Go to step 8. Go to step 7.
Step 7
Reseat the cable.
Does the problem remain?
Go to step 8. The problem is
solved.
Step 8
Replace the sensor. See
“Sensor (duplex path) with cover
removal” on page 466.
Does the problem remain?
Go to step 9. The problem is
solved.
Step 9
a Remove the rear door. See “Rear door removal” on page
449.
b Enter the Diagnostics menu, and then navigate to:
Printer diagnostics and adjustments > Motor tests
c Select the motor (Duplex), and then touch Start.
Does the motor run?
Go to step 12. Go to step 10.
Step 10
Reseat the motor cable J27 on the controller board.
Does the problem remain?
Go to step 11. The problem is
solved.
Step 11
Replace the motor. See
“Motor (duplex) removal” on page 450.
Does the problem remain?
Go to step 12. The problem is
solved.
4064
Diagnostics and troubleshooting
107
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