Lexmark MS911 Service Manual page 97

Action
Step 4
a
Make sure that the following sensors are properly installed:
•
Sensor (3000-sheet tray elevator level)
•
Sensor (3000-sheet tray empty)
•
Sensor (3000-sheet tray feed)
b
Make sure that the sensors are free of debris or dust.
c
Reseat the cable on the sensors and the cable CN5 on the controller
board.
d
Check the sensors for damage.
Are they free of damage?
Step 5
Enter the Diagnostics menu, and then navigate to:
SENSOR TESTS > 3000‑Sheet Tray Sensor Tests > Tray upper limit or
Tray paper feed
Does the sensor status change while toggling the sensor?
Step 6
Replace the sensor. See "Sensor (3000-sheet tray elevator level)
removal" on page 398 or "Sensor (3000-sheet tray feed) removal" on
page 399.
Does the problem remain?
Step 7
Test the motor (3000-sheet tray feed) and motor (3000-sheet tray
transport).
Enter the Diagnostics menu, and then navigate to:
MOTOR TESTS > 3000-Sheet Tray Motor Tests > Tray feed or Tray
transport
Do the motors run?
Step 8
a
Reseat the cable on the motor and the cable CN4 on the controller
board.
b
Check the motors and cables for damage, and replace if necessary.
See "3000-sheet tray feed and transport motors removal" on
page 406.
Does the problem remain?
Step 9
Check the belts and gears connected to the motors for wear or damage,
and replace if necessary.
Does the problem remain?
Yes
Go to step 5.
Go to step 7.
Go to step 7.
Go to step 9.
Go to step 9.
Go to step 10.
Diagnostic information
97
4021
No
Go to step 6.
Go to step 6.
The problem is solved.
Go to step 8.
The problem is solved.
The problem is solved.