Why is there no audio

@gnossis since you have already checked that Local Control is ON and the rest of the keyboard functions as it should, it sounds like your issue is with the audio circuit failing. Because the sound is missing from both the speakers and the headphone jack, the issue could be a failing volume slider, a weak power supply, or a blown audio amplifier IC.

Check your power supply first. Your keyboard should run on 6 AA batteries. Install new batteries and see if that works. If so, you know it is your power supply. If it does not, then check your volume slider. It is nothing but a sliding potentiometer which can collect dust and debris on the carbon traces. Spray some contact cleaner into the slider slot and move it up and down a few times to clean the internal contacts. If that did not resolve it, check your headphone jack. It is possible that it is damaged and shorts out the audio output stage. You can spray a little bit of contact cleaner into it and then rapidly plug and unplug a headphone connector into the jack 10 to 15 times to try and dislodge any stuck contacts.

Now, if all of that did not work, you will have to check your circuit board for any broken solder connections as well as any components that appear damaged or missing. check around IC101. Post some good pictures of your circuit board with your question. To work on your keyboard, use the Casio CTK 3200 Service And Parts Manual and let us know what you find out.

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