Samsung ML 2250 - Manual (Page 174)

I NSTALLING P RINTER O PTIONS D.3
D
Installing Memory and PostScript
DIMMs
Additional printer memory and the PostScript option are
provided on DIMMs (Dual In-line Memory Modules). This
procedure is applicable to either option.
1 Turn the printer power off and unplug all cables from the
printer.
2 Remove the two screws on the back of the printer.
3 Open the control board cover.