Epson Apex-80 - Manual (Page 126)

DIP Switch Settings
The Apex80 has twelve DIP (Dual In-line Package) switches that
allow you to change many of the printer’s settings to suit your
individual needs. The DIP switches are in two groups, mounted on the
back panel, as shown in Figure D-1.
Figure D-1.
DIP switch 1-1 is the switch at the far left side and the one at the far
right is DIP switch 2-4. You can easily reset the switches with a thin,
pointed object such as a small screwdriver or the cap of a ballpoint
pen.
Note
When you change a DIP switch setting, turn off the power, reset the
switch or switches, then turn on the power again. The printer checks
and recognizes new settings only at the time the power is turned on.
Defaults and DIP Switches