Brother MFC Series Service Manual page 144

(21) Slightly lift the rear end of the Head/carriage unit and detach it from the (two) CR guide
rail notches. Next, detach the front end from the CR frame to completely remove the
Head/carriage unit.
Note Do not touch the head nozzles (the printing ends) or ink supply ports (to which Ink
supply tubes are connected) of the print head. Doing so will not only stain your hands with
ink but also damage the nozzles and supply ports. If you accidentally touch them, perform
head cleaning.
CR timing belt
CR frame
(22) Remove the CR timing belt from the Head/carriage unit.
3-36
Head/carriage unit
Notches
CR guide rail
(3_030L)
Confidential