Lexmark W850n Service Manual page 47

Step
4 Inspect the pinch roll on the transfer roll guide assembly.
Is the transfer roll guide assembly free of damage?
5 Check the sensor (fuser exit) for proper operation.
1. Enter Diagnostics mode.
2. Select BASE SENSOR TESTS.
3. Select MEDIA PATH.
4. Select Fuser exit.
Open the printer left door assembly, and check it.
The area around the actuator is very hot. Allow the
fuser area to cool before proceeding.
Does the display on the operator panel change every time
the sensor actuator is operated?
6 Check the sensor (fuser exit) connection.
Is the sensor (fuser exit) properly connected?
7 Check the registration clutch for proper operation.
1. Enter Diagnostics mode.
2. Select MOTOR TESTS.
3. Select Registrat clutch.
Does the registration clutch make an audible clicking sound
when activated?
8 Check the registration clutch connection.
Is the registration clutch properly connected?
9 Perform a print test.
Does the error continue?
Check Yes
Go to step 5. Replace the
transfer roll guide
assembly.
Go to "Transfer
roll guide
assembly
removal" on
page 4-74.
Go to step 7. Go to step 6.
Replace the Replace the
sensor (fuser exit). connection.
Go to "Sensor
(fuser exit)
removal" on
page 4-102.
Go to step 8. Go to step 9.
Replace the Replace the
registration clutch. connection.
Go to
"Registration
clutch assembly
removal" on
page 4-77.
Replace the Problem solved.
printer engine card
assembly.
Go to "Printer
engine card
assembly
removal" on
page 4-119
Diagnostic information
4024-110
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