Brother DCP-9010CN Service Manual page 434

(3) Release the two Hooks of the Top cover open switch to remove the Top cover open switch
from the Side frame R.
Top cover open switch
Hook
3b
Hook
Harness routing: Refer to
Toner LED PCB ASSY."
(4) Release the Hook of the Lock arm from the Side frame R.
Side frame R
Hook
3a
Fig. 5-278
" Develop Release Sensor PCB ASSY, Top Cover Open Switch,
Lock arm
4b
Hook
Fig. 5-279
5-207
Top cover open switch
Hook
3a
Side frame R
Hook
Lock arm
4a
Side frame R
Confidential