Brother HL-3450CN Series User Manual page 177

Press the DIMM straight into the slot (press firmly). Make sure the locks on
5.
each side of the DIMM snap inward into place. (To remove a DIMM, the
locks must be released.)
Reinstall the main controller
6.
board into the printer by sliding it
into the guide rails.
Secure the main controller board with the two screws.
7.
Reconnect the printer cable from your computer. Plug the power cord into
8.
the AC outlet, and turn on the printer.
To check whether the DIMM has been installed correctly, you may perform
9.
a Test Print "Print Configuration" that will print the current memory size.
6-21
CHAPTER 6 OPTIONS
Fig. 6-28