Toner Add Motor Assembly Failure; Fuser Cooling Fan Failure - Lexmark W850n Service Manual

4024-110

914.00 Toner add motor assembly failure

Step
1 Check the toner cartridge for installation.
Remove the toner cartridge, and reinstall it.
Does it operate properly?
2 Check the gear rotation for the toner cartridge guide
assembly.
Remove the toner guide assembly.
Does the gear, located at the lower part of the toner
cartridge guide assembly, rotate smoothly?
3 Check the toner cartridge guide assembly for pipe clogging.
Is the pipe, located at the lower part of the toner cartridge
guide assembly, clogged?
4 Check the toner add motor assembly for operation.
Warning: Only perform this test in segments of three
seconds or less, or toner spill will occur.
Remove the top cover assembly, and observe the toner add
motor.
1. Enter the Diagnostics Menu.
2. Select MOTOR TESTS.
3. Select Printer Motor Test.
4. Select Toner add motor.
Note: When performing this test, the drum unit motor will
also operate.
Does the motor rotate normally?
5 Check the toner add motor assembly connection.
Is the toner add motor assembly properly connected?
6 Perform a print test.
Does the error continue?

915.00 Fuser cooling fan failure

Step
1 Check the fuser cooling fan for installation.
Is the fuser cooling fan installed securely?
2 Visually check the fuser cooling fan for rotation.
Is the fuser cooling fan visually rotating?
2-50
Printer Service Manual
Check
Check
Yes
Problem solved Go to step 2.
Go to step 3. Replace the toner
cartridge guide
assembly.
Go to step 4. Clean the pipe.
Go to step 6. Go to step 5.
Replace the toner Replace the
add motor. connection.
Go to "Toner
cartridge guide
assembly
removal" on
page 4-93
Replace the Problem solved.
printer engine card
assembly.
Go to "Printer
engine card
assembly
removal" on
page 4-119.
Yes
Go to step 2. Install the fuser
cooling fan
securely.
Go to step 5. Go to step 3.
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