Lexmark MX910de Service Manual page 173

Action
Step 7
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > 2 x 500-Sheet Tray Sensor Tests > Tray 3 lift plate limit
Does the sensor status change while toggling the sensor?
Step 8
a
Reseat the sensor cable.
b
Check the cable for damage, and replace if necessary.
Does the problem remain?
Step 9
Replace the sensor (2 x 500-sheet tray 3 lift plate level). See
tray transport assembly sensors removal" on page
Does the problem remain?
Step 10
Check the 2 x 500‑sheet tray controller board pins for damage, and replace
if necessary. See "2 x 500-sheet tray controller board removal" on
page 487.
Does the problem remain?
2 x 500‑sheet tray 4 lift plate failure service check
Action
Step 1
Enter the Diagnostics menu, and then navigate to:
PRINTER SETUP > Reset Engine Service Error
Does the problem remain?
Step 2
Enter the Diagnostics menu, and then navigate to:
MOTOR TESTS > 2 x 500-Sheet Tray Motor Tests > Tray 4 lift
Does the motor run?
Step 3
a
Reseat the motor cable.
b
Check the cable for damage, and replace if necessary.
Does the problem remain?
Yes
Go to step 10.
Go to step 9.
Go to step 10.
"2 x 500-sheet
492.
Contact the next level
of support.
Yes
Go to step 2.
Go to step 5.
Go to step 4.
Diagnostic information
173
7421
No
Go to step 8.
The problem is solved.
The problem is solved.
The problem is solved.
No
The problem is solved.
Go to step 3.
The problem is solved.