Epson ActionPrinter 4000 User Manual page 88

To select a character table, set DIP switch 1-7 according to the table
below.
0 t
CAUTION: To change the setting of a DIP switch, first turn
off the printer, change the DIP switch, and then turn the
printer back on.
Tables showing which characters are printed in each of the character
tables are listed in the Appendix.
Choosing a Character Table
Using the Printer 3-23