Brother DCP-9040CN Service Manual page 115

(9) Catch the Hooks of the Joint sub cover with the Joint cover ASSY and fix the Joint sub
cover with the one cup S M3x8 Taptite screw.
(10) Connect the four Connectors (CN3, CN7, CN10, CN19) into the Main PCB ASSY.
(CN3, CN7: MFC-9440CN/ 9450CDN only)
CN10
CN19
Main PCB ASSY
<Left side>
Joint cover ASSY
Taptite, cup S M3x8
Fig. 2-36
Joint cover ASSY
CN3
Fig. 2-37
2-23
Hooks
Joint sub cover
Speaker holder
Confidential