Apple Color StyleWriter 2500 - Manual (Page 14)

Plugging in the printer
Plug the connector end of the power adapter into the printer and then plug the
other end of the adapter into an outlet.
IMPORTANT The only way to disconnect power completely is to unplug the
power cord. Make sure that at least one end of the power cord is within easy
reach so that you can unplug the printer in an emergency.
5 Setting Up Your Printer