Brother HL-L5000D Service Manual page 301

(4) Remove the six shoulder screws (black).
(5) Remove the four bosses while pushing the back cover top in the direction of the arrow,
slide it up to release the two hooks, and remove the back cover.
Hook
Bosses
Bosses
Shoulder screws (black)
Hook
Back cover
Fig. 3-150
3-156
Confidential