Fuser Unit Assembly On Time Failure; Over Heat Temperature Failure - Lexmark W850n Service Manual

920.00 Fuser unit assembly on time failure

Step
1 Check the fuser unit assembly for a media jam.
Open the printer left door assembly, and check it.
Is there a media jam in the fuser unit assembly?
2 Leave the printer powered on with the error code displayed
for 10 minutes, then perform a POR.
Does the error still occur?
3 Check the fuser unit assembly for installation.
Open the printer left door assembly, and check it.
Is the fuser unit assembly installed securely?
4 Check the fuser unit assembly connection.
Is the fuser unit assembly properly connected?
5 Check between the LVPS card assembly P525 and the
printer engine card assembly P401 for proper connection.
Are the cards connected properly?
6 Perform a print test.
Does the error continue?

921.00 Over heat temperature failure

Step
1 Check the fuser unit assembly for installation.
Open the printer left door assembly, and check it.
Is the fuser unit assembly installed securely?
2 Check the fuser unit assembly for proper connection.
3 Check the connection between the LVPS card assembly
P525 and the printer engine card assembly P401.
Are the cards connected properly?
4 Perform a print test.
Does the error continue?
Check
Check
Yes
Remove the Go to step 2.
media.
Go to step 3. Problem solved.
Go to step 4. Install the fuser
unit assembly
securely.
Go to step 5. Replace the
connection.
Replace the fuser Replace the
unit assembly. connection.
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
unit assembly
securely.
Go to step 3. Replace the
connection.
Replace the fuser Replace the
unit assembly. connection.
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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