Brother HL-3040CN Service Manual page 218

(2) Remove the two Taptite bind B M4x12 screws from the Side cover L ASSY.
(3) Release the two Hooks and two Bosses on the upper side and five Hooks on the bottom,
and then remove the Side cover L ASSY from the Main body.
3a
Taptite bind B M4x12
Boss
Hook
Hook
3b
Boss
Taptite bind B M4x12
Side cover L ASSY
Main body
<Left side>
* Inside of Side cover L ASSY
Hook
Side cover L ASSY
<Back side>
<Front>
Hook
Hook
Fig. 5-27
5-44
Confidential