Brother MFC-J3520 Service Manual page 152

(14)Release the Hook 1. Release other six Hooks as rotating the Head cover in the
direction of the arrow 14a and remove the Head cover from the Head/carriage unit.
Hooks
Head cover
Hooks
(15)Unlock the Connector and disconnect the Flat cable from the Carriage PCB.
Head/carriage unit
Flat cable
Hook 1
14a
Hook
14b
Lock
Fig. 3-10
Fig. 3-9
3-32
Head/
carriage unit
Connector
Carriage PCB
Confidential