Lexmark W840 Finisher Service Manual page 72

4024-XXX
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 Bridge media exit test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media Path1.
5. Select Bridge media exit.
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 Fin media ent test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media Path1.
5. Select Fin media ent.
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?
9 Check the sensor (diverter gate) for correct operation.
Perform the Diverter gate test.
1. Enter Diagnostics mode.
2. Select FINISHER TESTS.
3. Select Sensor Tests.
4. Select Media Path2.
5. Select Diverter gate.
Does the display on the operator panel change every
time a piece of white media is placed over the sensing
area of the sensor (diverter gate)?
2-50
Finisher Service Manual
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).
See "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).
See "Sensor
(finisher media
entrance)
removal" on
page 4-98.
Go to step 11. Go to step 10.