Diagnostics and troubleshooting
 
123
 
Step 3
 
a
 
Enter the Diagnostics menu, and then navigate to:
 
Printer diagnostics & adjustments 
> 
Sensor tests
 
b
 
Find the sensor (MPF/pass
‑
through).
 
 
Does the sensor status change while toggling the sensor?
 
Step 4
 
Check the sensor cable for proper connection and damage, and 
replace if necessary.
 
 
Does the problem remain?
 
Step 5
 
Check the sensor for damage and replace if necessary.
 
 
Does the problem remain?
 
Step 6
 
a
 
Enter the Diagnostics menu, and then navigate to:
 
Printer diagnostics & adjustments 
> 
Sensor tests
 
b
 
Find the sensor (Pass
‑
through (tray 2)).
 
 
Does the sensor status change while toggling the sensor?
 
Step 7
 
Check the sensor cable for proper connection and damage, and 
replace if necessary.
 
 
Does the problem remain?
 
Step 8
 
Check the sensor for damage and replace if necessary. See
 
“Sensor (550-sheet tray pass-through) removal” on page 419
.
 
 
Does the problem remain?
 
Step 9
 
a
 
Enter the Diagnostics menu, and then navigate to:
 
Printer diagnostics & adjustments 
> 
Motor tests 
> 
Pass- 
through (tray 2)
 
b
 
Select a setting, and then touch 
Start
.
 
 
Does the motor run?
 
Contact the next 
level of support.
 
 
Step 10
 
Check the motor cable for proper connection and damage, and 
replace if necessary.
 
 
Does the problem remain?