I just got this printer and had the same problem.
I enabled printing, but scanning was not forthcoming.
I installed the drivers provided by this list of Brother scanner drivers, but was still unsuccessful.
After some work and research, I found that SANE (Scanner Access Now Easy) -- the API that provides access to the scanner in GNU/Linux -- does not currently support scanner connectivity over the network, so I hooked up my printer/scanner via USB and was able to connect... sort of. I also had to change the permissions of the device.
To find out where the printer was mounted:
lsusb
Output:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 04f2:b175 Chicony Electronics Co., Ltd 4-Port Hub
Bus 004 Device 002: ID 046d:c52e Logitech, Inc.
Bus 002 Device 007: ID 04f9:0270 Brother Industries, Ltd
Then changed the device permissions (full access for everyone):
chmod 777 /dev/bus/usb/002/007
Now I'm able to use the Ubuntu simple scan utility to do scanning as long as I'm connected via USB.
Does anyone have any solutions for Network scanning on this model?