Lexmark W850n Manual page 48

4024-110
Step Check
3 Check the media path.
1. Open the finisher front door assembly of the
finisher.
2. Open the lower pinch guide assembly to the right.
3. Check the buffer roll assembly by turning it with
your fingers.
Is the buffer roll assembly installed correctly, and is it
free of damage and contamination?
4 Are the four buffer pinch guide pinch rolls attached on
the lower pinch guide assembly installed correctly?
5 Check the sensor (diverter gate) for correct operation.
Perform the sensor (diverter gate) test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media Path2.
5. Select Diverter gate.
Open the finisher front door.
Move the lower media guide assembly to the right.
Insert a sheet of white media beneath the media
diverter gate. Then push the media to the sensor
(diverter gate).
Does the operator panel display change each time a
piece of media is placed at the front of the sensor
(diverter gate)?
6 Check the sensor (diverter gate) connection.
Is the above sensor connected properly?
7 Check the sensor (buffer path) for correct operation.
Perform the sensor (buffer path) test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media Path1.
5. Select Buffer path.
Open the finisher front door.
Lower the buffer pinch guide assembly.
Push a sheet of media into the buffer path and around
the buffer roll assembly in a clockwise direction.
Does the display on the operator panel change every
time the actuator of the sensor (buffer path) is
operated?
2-26
Finisher Service Manual
Yes No
Go to step 4. Clean or replace
the appropriate
rolls, and clean
the media path.
Go to step 5. Clean or replace
the appropriate
rolls and clean
the media path.
Go to step 7. Go to step 6.
Replace the After
sensor (diverter reconnecting, go
gate). Go to to step 7.
"Sensor
(diverter gate)
removal" on
page 4-110.
Go to step 9. Go to step 8.