The common type of error that occurs on this printer is the brother drum printer error So, let’s explore what this error is and ways to find it with the solution to resolve it. brother printer replace drum error then it indicates you should new one or if you feel it is not relevant message then There are two ways to solve the brother printer drum error, the first one is to replace the Fix Brother Printer Drum Error and the second one is to fix the error by following the steps.
http://quickutilities.us/blog/fix-brother-printer-drum-error

Drum Error (Drum!)
The corona wires have become dirty. Clean the corona wires in the drum unit. ...
The drum unit or the toner cartridge and drum unit assembly is not installed correctly. Reinstall the toner cartridge and drum unit assembly. ...
If the issue still continues, the drum unit is at the end of its life.