Calibration failed.  Do one of the following to clear the message:

• Turn off the machine. Wait a few seconds, then turn it on again.
  
  
• Put in a new drum unit. (Click here to see the details of how to replace the drum unit.)
  
  
• Put in a new belt unit. (Click here to see the details of how to replace the belt unit.)
  
  
• Put in a waste toner box. (Click here to see the details of how to replace the waste toner box.)

If the problem continues, please contact Brother Customer Service from "Contact Us".