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Problem with power transformer for my casio casiotone 403 electronic keyboard,don't know all the secondary voltages

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  • Anonymous Mar 30, 2014

    plugged in unit power light does not come on.

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  • Music Master
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Transformers are exceedingly reliable. Are you sure it is a problem? Also transformers can be rewound. I have tried to find a schematic but have not had success. Most power supplies in music equipment have only a singel secondary, usually with a center tap.

Posted on Mar 28, 2011

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1 Answer

Casiotone 403


it might still work for now. but the magic smoke is never a good sign when it comes to electronics.

i would open it and see what caused the smoke. any cracked/burnt components.,burnt leads on the circuit board or bulging or blown capacitors. if you then take a photo of the failed part(s) and upload together with a new question about it you will get a better and more accurate answer if its "safe" to use. and maybe even a fix for it

Oct 28, 2013 | Music

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I lost my adapter to my keyboard and I need to find either a substitute or a new way to turn it on without the adapter, HELP!!!.


Some Casio Keyboards use 9V DC (center negative) others 12V DC (center negative).
If check what voltage your Keyboard use. Generic AC adapters are usually center positive. So you have to invert the wire with a new DC plug to make it center negative,
Easiest is to buy a Casio ac adapter made for your keyboard from a Casio retailer.

Sep 12, 2013 | Casio Keyboard Power Adapter

1 Answer

It wont power up


Do You use original CASIO power adapter for this keyboard?
Some CASIO (CTK-5000) models require inverse voltage polarity than most of others adapters have!!! RISC OF BURNING OUT ELECTRONICS!!!

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What kind of adapter do i use for my keyboard Casio ca-110


if you don't want to wait, you can go to radio shack and get a universal adapter for a bit more, but it should work no problem.
http://www.amazon.com/HQRP-Adapter-compatible-Keyboards-Replacement/dp/B004TXDL3C

May 26, 2012 | Casio Music

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Keyboard not powering up. Want to change the fuse/s. Don't know where fuse is located.


There probably is NOT a fuse and usual cause is problem with the adapter or the power connectors. Broken solder of the connector in the keyboard is common. Broken cords on the adapter is common as well.

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Casiotone MT-220 keyboard power cord


I would inspect the unit for corrosion on battery terminals AND the power connector. The connector has a switch when a cord is plugged in, and if this switch doesn't work (they get bent) the unit will not work on batteries.
Best source of power adapters is often your local thrift store.
MATCH the voltage and whether it is AC or DC required AND the polarity if the pin is + or -.
Get one with enough current.

Apr 28, 2010 | Music

1 Answer

Need casiotone mt 36 manual please.


I went there as well casio.com/usa I would try the MA 150 many times the instructions are very close to each model. If this still wont help, try Ebay and Yahoo there a lot of manual collectors there . You may even get lucky on YouTube good luck DFD please rate me

Apr 10, 2009 | Casio Music

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