Brother HLL3290CDW Service Manual page 278

(5) Disconnect the USB host harness from the Main PCB, and release it from the securing
fixtures.
Harness routing: Refer to
(6) Remove the two Taptite pan B M4x14 screws to remove the MP maintenance cover from
the Inner front cover.
(7) Disconnect the USB host harness from the USB host PCB.
(8) Remove the Taptite pan (washer) B M4x12DA screw and the two Taptite bind B M4x12
screws. Release each Hook to remove the Inner front cover.
USB host PCB
USB host harness
Main PCB
Fig. 3-71
"10. Main PCB, Cartridge sensor relay
Taptite pan B M4x14
Taptite pan (washer)
B M4x12DA
Hook
Fig. 3-72
3-87
USB host harness
PCB".
MP maintenance cover
Taptite bind B M4x12
Inner front cover
Taptite bind B M4x12
Hook
Confidential