Brother DCP-9040CN Service Manual page 212

(4) Remove the Screw pan (S/P washer) M3.5x6 from the NCU shield cover, and then
remove the NCU shield plate.
Screw pan (S/P washer)
M3.5x6
(5) Disconnect the NCU harness ASSY.
(6) Remove the two cup S M3x6 Taptite screws from the NCU shield cover, and then remove
the NCU PCB ASSY.
Taptite, cup S M3x6
NCU harness ASSY
NCU shield cover
Fig. 3-91
NCU shield cover
Fig. 3-92
3-80
NCU shield plate
NCU PCB ASSY
Confidential