Lexmark C750 User Reference Manual page 116

80 Fuser Maintenance
What this message means:
The counter that tracks wear on the fuser has reached its limit.
What you can do:
•
Press Go to continue printing.
•
If print quality is unacceptable, replace the fuser.
See also:
Replacing the fuser
81 Engine Code
CRC Failure
What this message means:
Microcode in the engine flash code module has failed a system check.
What you can do:
•
Press to clear the message.
Go
•
Discard the code. Retransmit the microcode data from the host computer.
81 ITU Maintenance
What this message means:
The counter that tracks wear on the image transfer unit has reached its limit.
What you can do:
•
Press Go to continue printing.
•
If print quality is unacceptable, replace the image transfer unit.
See also:
Replace the image transfer unit and transfer roller
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