Press the Up or Down key to select "SPEAKER" and press the ENT
key.
Press the Up or Down key to select "INTERNAL" or "EXTERNAL"
and press the ENT key.
INTERNAL: uses the built-in speaker.
EXTERNAL: uses the external speaker.
Press the MENU key on the front panel.
Press the Up or Down key to select "SELFTEST" and press the ENT
key.
Press the Up or Down key to select "EEPROM" or "SW VER." and
press the ENT key.
EEPROM: tests whether the EEPROM works properly.
SW VER.: displays the software version.
Press the MENU key on the front panel.
Press the Up or Down key to select "RESET ALL" and press the
ENT key.
The following information appears on the screen.