Yamaha PortaSound PSS-780 Operating Manual page 7

PART I
yourself experimenting and discovering.
POWER
Inserting Batteries
Low Battery Warning
When the battery voltage drops below a certain level, the
LED displays will start to blink. As soon as this happens,
replace all six batteries with new ones. If you allow the bat-
teries to become spent completely, any data you have stored
in the internal memories will be lost.
Using an AC Power Adaptor
Plug the adaptor into a convenient wall socket and its con-
nector into the DC(9-12V)IN terminal (24) on the back of
your PortaSound as shown. (Even when power is turned
off, the AC adaptor backs up the PortaSound RAM memory.)
4
HEADPHONES © AUX. OUT = DCX9-12)IN
R Lean *
PLAYING
Slide the POWER switch (1) upward to the ON position.
The LED displays and various indicators will light up to
confirm that the PortaSound is turned on.
You can now play the keyboard. Adjust the sound level with
the VOLUME slider (2), pushing it up toward MAX to in-
crease volume and down to lower it.
e Be sure to turn your PortaSound off again by sliding the
POWER switch (1) back to OFF after you have finished
playing. This will save battery power.
DEMONSTRATION
To get an idea of the music your new PortaSound is capable
of playing, listen to the factory-programmed demonstration
song.
Start it by pressing the yellow DEMO START/STOP
button (14).