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WK-500 Left Channel Issue: Crackling, Static, Popping


Samtheman57

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Hello:

 

I have a good friend that recently purchased a used Casio WK-500 that she is very happy with until a few hours of use.

 

Unfortunately, there seems to be an issue with the left channel.

 

The on-board, left channel speaker began generating a hissing, popping static noise when the keyboard is played.

 

She was able to test the speaker output through both headphones and a keyboard amp, and the same left channel static popping continues to occur.

 

The keyboard was missing an AC adapter, and the keyboard is currently running on batteries only, so I am wondering if this is part of the problem?

 

The batteries have been flipped and the static/hiss/pop still occurs.

 

Wondering if this is a power issue/ something that can be repaired, or something that is  not worth the money or time.

 

Any thoughts appreciated.

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Since the static is heard in the headphones as well as the speakers, this eliminates the speaker and the speaker cut-off switch mounted inside the headphone connection.  Power/battery problems would affect left and right speakers or headphones pretty much equally.  This is most likely a loose or defective ribbon cable connector between two printed circuit boards.  The fact that this is a recent model and was at the low edge of the middle of the line price range, deciding whether or not it is worth repairing will be a bit difficult.  A rule of thumb, for US based repairs, is aound $100 just to "open up the box and take a look".  Extensive diagnostics, replacement parts, and/or shipping will obviously escalate repair costs very quickly.

 

 

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