Brother MFC990CW Service Manual page 447

NOTE 1: 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
Too many files
Card Error
NOTE 2: After the completion of firmware updating, a file named "mfu-send.log" (which
stores the execution log) is created in the layer right below the "BROTHER" folder.
NOTE 3: If program loading with an external memory fails, load programs from the PC
following the instructions given on
The external memory is being used by another operation.
No external memory is inserted.
- No "BROTHER" folder in the external memory
- Invalid file name
There is more than one file having the extension .pjl in the folder.
External memory defective
page App. 2-7.
App. 2-9
Cause
Confidential