Epson LQ 630S Reference Manual page 56

Follow these steps to change the lock-out mode setting:
1. When using continuous paper, make sure paper is loaded and
the printer is turned off.
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2. Turn on the printer while holding down both the Load/Eject
and LF/FF buttons more than five seconds.
The printer enters the lock-out setting mode. When using
continuous paper, the printer prints the language selection
instructions (one page).
3. When using single-sheet paper, load paper in the printer. The
printer prints the language selection instructions (one page).
4. Make desired changes to the setting according to the
instructions.
5. Turn off the printer and exit the lock-out setting mode.
See "Turning on or off the lock-out mode" on page 49 for
instructions on how to turn the lock-out mode on after you change
the lock-out mode setting.
50
Control Panel
Caution:
Whenever you turn off the printer, wait at least five seconds
before turning it back on; otherwise, you may damage the
printer.