Brother DCP-L8400CDN Service Manual page 233

(6) Release all the wiring from the Document scanner unit.
(7) Release the Hook and remove the Flat core from the Joint cover top.
(8) Pull out the Second side CIS flat cable from the Flat core.
Document scanner unit
Joint cover top
(9) Remove the two Taptite bind B M4x12 screws from the right side of the Main body.
(10) Remove the two Taptite bind B M4x12 screws from the left side of the Main body.
(11) Remove the two Taptite cup B M4x12 screws from the back side of the Main body.
Taptite cup B M4x12
Main body
Taptite bind B M4x12
<A view>
Flat core
Fig. 3-67
Fig. 3-68
3-69
Flat core
Joint cover top
Hook
Second side CIS flat cable
A view
Taptite bind B
M4x12
Confidential