Epson 500 Series - Manual (Page 72)

3.
After typing the password, press Enter. You see the following
prompt:
Re-Enter NEW Password:
4 . Type the same password again and press Enter. (This confirms
your password for the system.) The program displays the
following message:
NEW Password Installed
5. Press Esc to return to the main menu screen. Highlight
Save Settings and Exit and press Enter.
Now, you must enter the password each time you start or reset the
computer and/or before the Setup program will start. See
chapter 2 for information about using the password you have
defined.
Running Setup 5-9