Center Thermistor Failure; Rear Thermistor Failure; Pressure Roll Thermistor Failure - Lexmark X850e Service Manual

7500-XXX

922.00 Center thermistor failure

Step
1 Check the fuser unit assembly for proper installation.
Open the printer left door assembly and check it.
Is the fuser unit assembly installed properly?
2 Check the fuser unit assembly connection.
Is the fuser unit assembly properly connected?
3 Perform a print test.
Does the error continue?

923.00 Rear thermistor failure

Step
1 Check the fuser unit assembly for proper installation.
Open the printer left door assembly and check it.
Is the fuser unit assembly installed properly?
2 Check the fuser unit assembly connection.
Is the fuser unit assembly properly connected?
3 Perform a print test.
Does the error continue?

924.00 Pressure roll thermistor failure

Step
1 Check the fuser unit assembly for proper installation.
Open the printer left door assembly and check it.
Is the fuser unit assembly installed properly?
2 Check the fuser unit assembly connection.
Is the fuser unit assembly properly connected?
2-162
MFP Service Manual
Check
Check
Check
Yes
Go to step 2. Install the fuser
unit assembly
properly.
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 4-117.
Yes
Go to step 2. Install the fuser
unit assembly
properly.
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 4-117.
Yes
Go to step 2. Install the fuser
unit assembly
properly.
Replace the fuser Replace the
unit assembly. connection.
No
No
No