Yamaha Clavinova CVP-55 Ground noise over OPTIONA IN RCA's

by clavifan
(Spain)

Hello,



I can't put any RCA on OPTIONAL IN because this input has a lot of ground noise. I have an MU-90 tone generator designed for this input and can't operated via CVP-55 amplifier.

The noise is over the speakers or headphones. ONLY with OPTIONAL IN RCA's (included connecting only the RCA cable without any other machine in the other side of the cable).

I checked visually and check cable connections inside Clavinova but all is right visually.

Any help please?


All the info is in this post, it's mine:

https://yamahamusicians.com/forum/viewtopic.php?f=110&t=10255

Thanks a lot

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Jul 23, 2019
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starstarstarstarstar 		Noise filter
by: Clavifan

Yes, but the noise filter can't eliminate the ground noise.

The problem is inside the Clavinova. Maybe the motherboard? Where I can get a new board?
Jul 23, 2019
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starstarstarstarstar 		Noise filter
by: Rick

Have you tried a noise filter between the source and the Clavinova?

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