Test this:
Download this files:
http://download.brother.com/welcome/dlf101555/dcpj4120dwlpr-3.0.1-1.i386.deb
http://download.brother.com/welcome/dlf101556/dcpj4120dwcupswrapper-3.0.1-1.i386.deb
Install the drivers:
Turn on the printer and connect the usb, network or parallel cable.
Go to the directory where the drivers are.
In a terminal
Press Ctrl+Alt+T
run:
sudo -i
dpkg -i --force-all dcpj4120dwlpr-3.0.1-1.i386.deb
dpkg -i --force-all dcpj4120dwcupswrapper-3.0.1-1.i386.deb
Depending on the connection type you are using USB or Network, follow one of the steps below.
For USB Connection:
Open a web browser and go to "http://localhost:631/printers".
Check if the Device URI of your printer is "usb://Brother/(your printer's model name)"
If the device URI is different from the example above, please go to "Modify Printer" of your printer to select proper device and driver.
If your printer is not listed on "http://localhost:631/printers", please go to "http://localhost:631/admin" and click "Add printer" and select proper device and driver.
For Network Connection:
Open a web browser and go to "http://localhost:631/printers".
Click "Modify Printer" and set following parameters.
"LPD/LPR Host or Printer" or "AppSocket/HP JetDirect" for Device
lpd://(Your printer's IP address)/binary_p1 for Device URI
Brother for Make/Manufacturer Selection
Your printer's name for Model/Driver Selection
For Scanner driver 32bit:
Download this files:
http://download.brother.com/welcome/dlf006646/brscan4-0.4.3-0.i386.deb
http://download.brother.com/welcome/dlf006651/brscan-skey-0.2.4-1.i386.deb
http://download.brother.com/welcome/dlf006654/brother-udev-rule-type1-1.0.0-1.all.deb
Install the drivers:
Go to the directory where the drivers are.
In a terminal
Press Ctrl+Alt+T
run:
sudo -i
dpkg -i --force-all brscan4-0.4.3-0.i386.deb
dpkg -i --force-all brscan-skey-0.2.4-1.i386.deb
dpkg -i brother-udev-rule-type1-1.0.0-1.all.deb
For Scanner driver 64 bit:
Download this files:
http://download.brother.com/welcome/dlf006645/brscan4-0.4.3-0.amd64.deb
http://download.brother.com/welcome/dlf006652/brscan-skey-0.2.4-1.amd64.deb
http://download.brother.com/welcome/dlf006654/brother-udev-rule-type1-1.0.0-1.all.deb
Install the drivers:
Go to the directory where the drivers are.
In a terminal
Press Ctrl+Alt+T
run:
sudo -i
dpkg -i --force-all brscan4-0.4.3-0.amd64.deb
dpkg -i --force-all brscan-skey-0.2.4-1.amd64.deb
dpkg -i brother-udev-rule-type1-1.0.0-1.all.deb