Brother DCP8020 - Manual (Page 262)

15 - 3 OPTIONAL ACCESSORIES
WARNING
DIMM boards can be damaged by even a small amount of static
electricity. Do not touch the memory chips or the board surface.
Wear an antistatic wrist strap when you install or remove the board.
If you do not have an antistatic wrist strap, frequently touch the bare
metal on the printer.
4
Hold the DIMM with your fingers on the side edges and your
thumb on the back edge. Line up the notches on the DIMM with
the DIMM slot. (Check that the locks on each side of the DIMM
slot are open or facing outwards.)
5
Press the DIMM straight into the slot (press firmly). Make sure
the locks on each side of the DIMM click into place. (To remove
a DIMM, you must release the locks.)
6
Put the metal plate back on and secure the metal plate with the
two screws.
7
Put the side cover back on.