Lexmark W850n Service Manual page 51

Step
6 Check the sensor (exit 2) for proper operation.
1. Enter Diagnostics mode.
2. Select BASE SENSOR TESTS.
3. Select Media Path.
4. Select Exit2.
Does the display on the operator panel change every
time the actuator on the above sensor operates?
7 Check the sensor (exit 2) for proper connection.
Is the above sensor connected properly?
8 Check the exit 2 drive motor for proper operation.
1. Enter Diagnostics mode.
2. Select MOTOR TESTS.
3. Select Exit 2 drive mtr.
4. Select Forward or Reverse.
Does the above motor rotate normally?
9 Check the exit 2 drive motor for proper connection.
Is the above motor connected properly?
10 Perform a print test.
Does the error still occur?
11 Perform a print test.
Does the error still occur?
Check Yes
Go to step 8. Go to step 7.
Replace the sensor Replace the
(exit 2). connection.
Refer to Options
Service Manual.
Go to step 10. Go to step 9.
Replace the exit 2 Replace the
unit assembly. connection.
Refer to Options
Service Manual.
Replace the exit Problem solved.
interface card
assembly.
Go to "Exit
interface card
assembly removal"
on page 4-117.
Go to step 11.
Replace the printer Problem solved.
engine card
assembly.
Go to "Printer
engine card
assembly removal"
on page 4-119.
Diagnostic information
4024-110
No
2-31