20 Most Recent Casio CTK-720 Electronic Keyboard with Stand, AC Adaptor and Instructional DVD Questions & Answers


PC drivers available at Casio
http://support.casio.com/en/support/download.php?cid=008&pid=20

If you have a MAC google casio driver for Macs by 3rd party.

Casio CTK-720... | Answered on Oct 07, 2019


This could be a loose plug inside the unit or it could be a circuit that is bad. If the plug failed it is from physical damage from something like tripping over it or heavy use. That can be repaired by replacing the plug. If it is something like a component in the unit on a board then it becomes a little more involved.

Casio CTK-720... | Answered on Mar 26, 2016


try plugging in without the bateries...Also check your adaptor as well as your ac requirements on your keyboard..It specifically calls for a Casio AD-5 Adaptor.
  • 9V power supply; 850mA
  • Positive sleeve/negative tip This needs to match your adaptor Good Luck
http://support.casio.com/pdf/008/ctk_720_01_e.pdf

Casio CTK-720... | Answered on Feb 24, 2015


SD or SDHC memory cards must be between 2GB to 32GB

1GB SD card for earlier models or even 2GB SD formatted by earlier models are incompatible (folder structure has changed)

Casio CTK-720... | Answered on Aug 02, 2014


The Mac needs the driver, and you may need to select it in Chooser as well. If it is not on the instruction disk, it should be downloadable from the manufacturers website.

Casio CTK-720... | Answered on Sep 25, 2012


If you are running on batteries, they are either depleted OR may have corrosion on the contacts in the keyboard which is COMMON problem. If using an adapter, the cords chronically work loose. A last problem is the switching for using battery or adapter can have poor contacts. If you don't have an adapter, get one and get one SPECIFICALLY for the keyboard... I don't know how many I have had to tell they have the wrong adapter and that is why their unit won't work.

Casio CTK-720... | Answered on May 16, 2011


You manual is here http://support.casio.com/storage/en/manual/pdf/EN/008/Web_CTK2400-ES-1A_EN.pdf
Interestingly...check out page EN-34...about the section on local control...Follow the directions to turn your sound back up... Good luck

Casio Music | Answered on Jul 18, 2020


If you have the part, you need a soldering iron, solder wick and solder. Apply heat with the iron to the lugs on the input that protrude through the circuit board, and apply solder wick to desolder the bad part - do this for all the contacts. Remove the bad connector, place the new one and heat the lugs one at a time, once the iron has been on the lug for several seconds, apply the solder to the lug and hold for a second or two. When the solder melts and flows remove the iron and the solder. Allow it to cool - repeat for all the lugs. A good solder joint is shiny. A bad one is dull, and that is called a cold solder joint. If you get a bad one, just heat it back up and wick the solder away and start over.

Casio Music | Answered on Sep 30, 2019

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