Brother DCP-L8400CDN Service Manual page 289

(3) Remove the eight Taptite bind B M4x12 screws from the Joint cover top.
Taptite bind B M4x12
Taptite bind B M4x12
(4) Remove the Screw pan (S/P washer) M3.5x6 screw and remove the Modem ground
harness from the High-voltage power supply PCB ASSY.
Modem ground harness
Screw pan (S/P washer) M3.5x6
<Right side>
Taptite bind B M4x12
Fig. 3-167
Fig. 3-168
3-125
Taptite bind B M4x12
Joint cover top
<Front side>
High-voltage
power supply PCB
ASSY
Confidential