Brother DCP-L8400CDN Service Manual page 481

(26) 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>
(27) Disconnect the wiring of the Modem ground harness.
(28) Remove the four Taptite bind B M4x12 screws from the Back cover upper.
(29) Release the two Hooks and remove the Back cover upper from the Main body.
Back cover upper
Hook
Taptite bind B M4x12
Fig. 7-41
Fig. 7-42
7-24
High-voltage power
supply PCB ASSY
Taptite bind B M4x12
Hook
Main body
<Front side>
Confidential