Brother DCP-L8400CDN Service Manual page 288

(3) Release the eight Hooks and remove the Joint cover top from the Main body.
Joint cover top
Hook
Hook
■
Legal model
(1) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem FG harness
from the Main PCB plate.
(2) Disconnect the Modem flat cable (CN28) from the Main PCB ASSY.
Modem FG harness
<Back side>
Screw pan (S/P washer) M3.5x6
Fig. 3-165
CN28
1
Main PCB plate
Fig. 3-166
3-124
Hook
Hook
Hook
Main body
2
Main PCB ASSY
Modem
flat cable
Confidential