If color still appears incorrectly after auto-registration, you will need to perform manual registration.
1
For MFC-9440CN, press Menu, 4, 7, 1.
For MFC-9840CDW, press Menu, 4, 8, 1.
For DCP-9040CN, press Menu, 3, 7, 1.
2
Press Mono Start or Color Start to start printing the color registration chart.
3
When the machine has finished printing the registration sheet, press 2 (Set Regist.) to correct the color manually.
4
Starting at 1 (Magenta Left) on the chart, check which colored bar has the most uniform print density and enter its number into the machine using the and keys.
Press OK.
Repeat for 2 (Cyan Left), 3 (Yellow Left), 4, 5, 6 to 9.
and 
keys. 