Top 20 Casio Privia Px330 Px-330 88 Key Digital Piano New - Page 4 Questions & Answers

http://support.casio.com/manualfile.php?rgn=5&cid=008006016

Casio generally speakeing work the opposit way around to Yamaha and most other power supplies. - to centre pin + to outer Check voltage on keyboard or in the manual to be 100% sure

Is not exactly your model, but it might be helpful: px 100

Many Casio electronic instrument manuals are available here: http://support.casio.com/en/manual/manuallist.php?cid=008 . However, I found the CTK-519 manual at Manuals Lib: https://www.manualslib.com/manual/358021/Casio-Ctk-501.html . I hope this helps. Cindy Wells

you need a competent repair technician to look at it and test things.

I have replaced several of these sockets. I usually take them out of old toys. I would however suggest either frys electronics, radio shack (if still open near you) or amazon

I got my manual online. Google search

The manual describes all procedures: http://support.casio.com/pdf/008/PX410R_e.pdf

I found this! https://www.manualslib.com/manual/268824/Casio-Ctk-573.html

I assume you mean through its own speakers. (If you are running through an amp, make sure everything is powered from the same power point) If the hum is coming from the unit but not through the speakers, you have a more serious problem. If you are not using the supplied power adapter that could be the problem. If you are using the mic input, the mic lead could be the problem, or it might be passing close to the power adapter or some other hum source. try a different lead, and make sure the lead is well away from everything. Some other device might be too close. Try moving things around, or a new location.

Unplug while unit is on. Then press and hold power button for about a minute. Replug back in see if that does trick. If not call company for a hidden code if available.

You can't add songs to the LK-30 song bank. I suspect you would need to take apart the keyboard and replace the ROM (read-only memory) chip to get a different song collection. Most Casio electronic instrument manuals are available from http://support.casio.com/en/manual/manual.php?cid=008 . However, I found the LK-30 manual at manualslib.com: https://www.manualslib.com/manual/358460/Casio-Lk-30.html . I wish that I had better news for you. Cindy Wells

You can find that here free download https://www.manualslib.com/products/Casio-Ctk-519-692441.html

Is your polarity correct ???

From CASIO, duhhh ?

To rule out the power supply, or the related power supply circuitry - try it with batteries. If the problem goes away, you can try another 9v power supply with the same ma current (or higher) just make sure it is the correct polarity.

What model? Diodes are either burned up (but you would see the ends still present) or missing because they aren't applicable to that model. It's more likely the rubber pads under the keys need to be replaced