Diagnostics and troubleshooting
 
107
 
Step 3
 
Check the duplex paper path for paper jams and obstructions.
 
 
Is the paper path free of jams and obstructions?
 
Step 4
 
Remove the jams and obstructions.
 
 
Does the problem remain?
 
Step 5
 
a
 
Enter the Diagnostics menu, and then navigate to:
 
Printer diagnostics & adjustments 
> 
Sensor tests
 
b
 
Find the sensor (Duplex path  2).
 
 
Does the sensor status change while toggling the sensor?
 
Step 6
 
Check the sensor cable for proper connection and damage, and 
replace if necessary.
 
 
Does the problem remain?
 
Step 7
 
Check the sensor for damage, and replace if necessary.
 
 
Does the problem remain?
 
Step 8
 
a
 
Enter the Diagnostics menu, and then navigate to:
 
Printer diagnostics & adjustments 
> 
Motor tests 
>
 
Duplex/MPF
 
b
 
Select a setting, and then touch 
Start
.
 
 
Does the motor run?
 
Step 9
 
Check the motor cable for proper connection and damage, and 
replace if necessary.
 
 
Does the problem remain?
 
Step 10
 
a
 
Replace the motor. See 
“Motor (duplex/MPF) removal” on 
page 352
.
 
b
 
Perform a print job.
 
 
Does the problem  remain?