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Yamaha cvp-20 parts help
#2380182 01/30/15 09:33 PM
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Hello. I have an old Yamaha Clavinova CVP-20. The trouble is the some keys require more force than they should to generate sound. I have tried cleaning the contacts on the circuit board and rubber strip, but I think the rubber strip is too far gone. It seems to have pretty good impressions of the electrical contacts. I am hoping that replacing the rubber strip would fix the keyboard. Apparently I need part VS549900. I am being told that it's no longer available from a US-based internet parts store.

I thought I would ask the experts here if there are any known substitutes from more recent models in which the parts are available. In other words, is there another model that uses the same strip (maybe a longer keyboard--I could shorten the part for this one)? Thanks for any help.

Re: Yamaha cvp-20 parts help
crosstalk #2380221 01/30/15 11:29 PM
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The GH3 keyboard uses these pads:
Code
Part Num   Description
--------   ---------------------------------------------
V8286600   Rubber Contact, Octave 12 Keys D-C#    D-C#
V8286800   Rubber Contact, Octave  5 Keys A-C#    A1-C#0
V8286700   Rubber Contact, Octave 11 Keys D-C     D6-C7
Does your CVP20 have three sensors per key (as does the GH3 keyboard for which these pads are intended?
Or does it have two-sensors per key?
If the latter, these parts won't work.

Pads for the GH keyboard **might** work. Those keyboards have two sensors per key.
The GH keyboard is still in production, so parts should be available. But I don't have part numbers.

Re: Yamaha cvp-20 parts help
crosstalk #2380574 01/31/15 06:09 PM
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Thanks for trying to help. My machine has two contacts per key. I was also thinking I might try flipping the strip in the hopes that the existing impressions wouldn't be a factor and new rubber would be under the electrical contacts. I also thought about trying to paint on some conductive rubber (silicone, graphite, naphtha mixture) to renew the strip. Has anyone tried that? Seems a bit crazy since the part might be destroyed, but sometimes you have to go for it.

Re: Yamaha cvp-20 parts help
crosstalk #2380605 01/31/15 06:47 PM
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I think I have this rubber your are looking for boxeed in the basment.
I ordered it to repair a clp360 but never used ( very dificult to replace) and sold it without repair.
I AM 90% sure that it can fit on your DP. Let me check the service manual to compare the parte number.





Roland HP 503 + audio-technica ATH-M40x + M-Audio AV30 Studiophile + Roland duo capture EX

Re: Yamaha cvp-20 parts help
crosstalk #2380691 01/31/15 11:33 PM
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Leesan-

Thanks very much for your help. I looked up the part list for the clp-360. The rubber contact is part vc799200 (current substitution is vs549800). The cvp-20 I have is a 76 key unit and it looks like the clp-360 is 88 keys, but may have the same two contact technology that uses a longer version of the same rubber contact strip. The parts diagrams for the keyboard unit look very similar. I will send you a PM.

Re: Yamaha cvp-20 parts help
crosstalk #2381195 02/02/15 06:16 AM
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Originally Posted by crosstalk
Leesan-

Thanks very much for your help. I looked up the part list for the clp-360. The rubber contact is part vc799200 (current substitution is vs549800). The cvp-20 I have is a 76 key unit and it looks like the clp-360 is 88 keys, but may have the same two contact technology that uses a longer version of the same rubber contact strip. The parts diagrams for the keyboard unit look very similar. I will send you a PM.


Hi Crosstalk,

Be careful with trying to adapt a rubber contact strip from a piano with a different keyboard extension.

Some Yamaha contact strips are not even symmetric, in the sense that if you mount them the wrong way you will hear really curious things (i.e. single keys will work, but chords will fail)!

Have you checked ebay? I have bought compatible rubber strips for my old CLP-970 there and they work fine.

Ciao,
Paolo


Yamaha CLP-970
Roland JV-1080
Re: Yamaha cvp-20 parts help
crosstalk #2381307 02/02/15 12:44 PM
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Thanks Paolo. I checked ebay and leesan gave me an ebay lead, so I will follow up on that. I also tried ordering the part from another supplier, but I have a feeling they will get back to me in a couple of days with "no longer available."

Re: Yamaha cvp-20 parts help
crosstalk #2381633 02/03/15 03:26 AM
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Good luck Crosstalk, I hope you can fix your keyboard!

In case you don't manage to get the spare, there might still be room for improvement by checking and (very delicately) cleaning the malfunctioning contacts.

Ciao,
Paolo


Yamaha CLP-970
Roland JV-1080

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