Operation Manual

8
Power supply, connections, demos
Power supply
The CD20/30 can either be powered by batteries, or by the
mains supply (using the optional mains adaptor).
The two methods of supplying power are alternatives. When
the mains adaptor plug is inserted it automatically overrides
the batteries.
Inserting the batteries
If connected, unplug the mains adaptor from the socket on
the instrument.
Use 1.5V “C” size (R14) batteries. Alkaline batteries last longer
than normal ones and should be preferred.
1. Turn the instrument over so that the battery compartment
underneath is accessible:
2. Remove the flap and slide in the batteries. Make sure that
the “+” and“-” polarities on the batteries coincide with the
corresponding polarity signs marked on the instrument (
the “-” pole must be towards the inside of the compart-
ment).
3. Close the battery compartment and turn the instrument
back the right way up.
4. Turn on the instrument by setting the switch to ON.
Connecting the mains adaptor to the power supply
Use only the mains adaptor provided as an option by
Generalmusic. Any other type of adaptor, even though it may
look the same, may not be suitable and will therefore cause
damage to the equipment.
1. Connect the mains adaptor jack plug into the “12V D”
socket at the rear of the instrument.
2. Plug the other end of the mains adaptor into a wall socket.
3. Turn on the instrument by setting the switch to ON.
Amplification
The sound from the CD20/30 can either be heard through
the built in speakers, through an external amplifier or through
headphones.
The volume of the built in amplifier and the stereo headphones
can be regulated using the [VOLUME] slider.
Built in speakers
These work when no headphones are connected to the
headphone socket. They work independently from the out-
puts for external amplification.
External amplification
Connect an external amplifier to the LEFT and RIGHT out-
puts (use both for a stereo signal or just the RIGHT/M output
for a mono signal).
To exclude the built in speakers and just use an external am-
plifier all you need to do is plug headphones (or even just a
normal jack plug) into the PHONES socket.
Use the [VOLUME] slider to regulate the volume output from
the CD20/30.
Stereo headphones
Connect stereo headphones to the PHONES socket. Plug-
ging in a jack disactivates the built in speakers.
Pedals
Special Damper and Volume pedals, available as options from
Generalmusic can be connected to the instrument.
Damper
Needs a “footswitch” type pedal.
Pressure on this pedal means that the notes of the Upper
instrument part are held, like the sustain pedal on a tradi-
tional piano.
Volume
Needs a “continuous control” type pedal.
Movement of this pedal controls the overall instrument vol-
ume and serves the same purpose as the [VOLUME] slider.
Demo
Having made all the connections, you can now check whether
sound comes out properly from the speakers, the headphones
or from the external amplifier. Use the DEMO function for
this.
1. Press the [DEMO] button to start the sequence of demo
songs. During this phase it is not possible to use any other
function on the instrument apart from the volume slider
[VOLUME].
2. Press the [DEMO] button once more to interrupt the se-
quence and return to the instrument’s normal functioning
mode.