Brother DCP-L8400CDN Service Manual page 495

(36) Disconnect the three Connectors (CN4, CN9 and CN11) from the Main PCB ASSY.
(37) Disconnect the wiring of the Main USB host harness ASSY.
Main PCB ASSY
(38) Remove the seven Taptite bind B M4x12 screws from the Joint cover base ASSY.
(39) Remove the two Taptite bind B M4x12 screws from the back of the Joint cover base ASSY.
Taptite bind B M4x12
Taptite bind B M4x12
Main body
CN38
CN37
CN41
CN39
CN42
CN43
CN44
CN46
CN47
CN40
Fig. 7-69
Taptite bind B M4x12
Taptite bind B M4x12
Fig. 7-70
7-38
CN33
CN28 CN20
CN32 CN27
CN2
CN5
CN6
CN49
CN21
CN8
CN10
CN12
CN11
CN9
CN22
CN14
CN15
CN26
CN17
CN18
CN19
CN45 CN30 CN31
CN3
CN4
CN7
CN13
CN16
Taptite bind
B M4x12
<Front side>
Joint cover base ASSY
Confidential