Brother MFC5490CN Service Manual page 148

NOTE: If any of the error messages listed below appears, press the Stop/Exit key, and the
machine returns to the initial stage of the maintenance mode.
Error Message
Card is used
Insert Card
No file
Card Error
Machine ID Error
Write Error
The external memory is being used by another operation.
No external memory is inserted.
- No "BROTHER" folder in the external memory
- Invalid file name
Failed to open the file.
Mismatch of serial numbers between the machine and the backup
data (which is detected only in data restoration).
Writing to an external memory failed due to insufficient capacity.
5-5
Cause
Confidential