Brother HL-8050N - Manual (Page 164)

APPENDIXES A - 6
DIMM Memory
Installing the DIMM Memory
1
Turn off the printer power switch.
2
Pull out the AC power cord from the AC power
outlet/socket and then the printer.
Make sure you turn the power to the printer off before you
install or remove the DIMM.
3
Loosen the screw on left side of the back of the printer,
and then remove the side cover.
4
Loosen the two screws, and then remove the metal plate
by lifting it up slightly.