Epson 1170 - Manual (Page 62)

DIP Switches
By changing the settings of the two sets of DIP switches, which
are inside the compartment on the control panel, you can control
various printer features, such as the character set and the page
length. These new settings become effective when the printer is
turned on, reset, or initialized.
Changing a DIP-switch setting
1.
Make sure the printer is turned off.
2. Open the DIP-switch cover.
3.
Use a pointed instrument, such as the tip of a pen, to turn a
switch on or off. The tables on the following pages give the
DIP-switch functions for each setting.
4. Close the DIP-switch cover.
The new DIP-switch settings take effect when the printer is turned
on.
3-6 Using the Printer