Comment 203 for bug 1728012

All that was needed for my Brother DCP-L2550DW was to 'apt purge' the manually installed drivers:

$ sudo apt --auto-remove purge brscan4 dcpl2550dwpdrv

Then *BE SURE* to use the Brother installer script: linux-brprinter-installer-2.2.1-1.gz

(or whatever your current version is from the support.brother.com website, etc.)

Follow the instructions from the Brother download site and during the
script installation to-the-letter(EXACTLY)!

*** CAVEAT: use the printer I.P. addy if on a LAN and _NOT_ the auto-
detected mDNS addy if you have an AT&T Fiber residential gateway such as
mine(BGW210-700) which has a ".local" domain hard-coded in the DNS. This
effectively kills mDNS(Avahi) broadcasts and so I'm not able to connect
to the printer using that system.

CUPS Connection: lpd://192.168.1.220/BINARY_P1