Lexmark W850n Manual page 77

Step Check
4 Are the media entrance pinch guide pinch roll on the
entrance pinch guide assembly and media entrance
roll assembly free of damage?
5 Check the sensor (bridge unit media exit) for correct
operation.
Perform the sensor (bridge unit media exit) test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media Path1.
5. Select Bridge media exit.
Open the bridge unit top cover assembly.
Does the display on the operator panel change every
time the actuator of the sensor (bridge unit media exit)
is operated?
6 Check the sensor (bridge unit media exit) connection.
Is the above sensor connected properly?
7 Check the sensor (finisher media entrance) for correct
operation.
Perform the sensor (finisher media entrance) test.
1. Enter Diagnostics mode
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media Path1.
5. Select Fin media ent.
Detach the finisher from the printer.
Insert a sheet of white media into the finisher media
path entrance.
Does the display change, every time a piece of white
media is placed over the sensor (finisher media
entrance)?
8 Check the sensor (finisher media entrance)
connection.
Is the above sensor connected properly?
Yes No
Go to step 5. Clean or replace
the appropriate
transport belts
and bridge unit
pinch roll, and
clean the media
path.
Go to step 7. Go to step 6
Replace the Replace the
sensor (bridge connection.
unit media exit).
Go to "Sensor
(bridge unit
media exit)
removal" on
page 4-17.
Go to step 9. Go to step 8.
Replace the Replace the
sensor (finisher connection.
media entrance).
Go to "Sensor
(finisher media
entrance)
removal" on
page 4-98.
Diagnostic information
4024-110
2-55