Memory Modules; Installing A Memory Module - Epson EPL-N2000 Reference Manual

Memory Modules

By installing a Single In-line Memory Module (SIMM) in both
open slots, you can increase printer memory up to 68 MB. You
may want to add additional memory if you are having
difficulty printing complex, graphics-intensive pages or if you
regularly use numerous downloaded fonts.
You can purchase SIMMs from various vendors. Be sure the
SIMM you purchase meets the following requirements:
72-pin type
Capacity of 1, 2, 4, 8, 16, or 32 MB
Access speed of 70ns or less
Dimensions within 108 mm (4.25 inches) 39 mm
(1.53 inches), with a thickness of 10 mm (0.4 inch)

Installing a memory module

1. Turn off the printer.
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2. Unplug the power cable from the electrical outlet.
3. Remove all interface cables from the interface connectors.
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Warning:
To avoid electrical shock, do not attempt to install a SIMM
unless the printer is turned off.