Static Noises from Speakers - Yamaha Clavinova CVP-207

MY CVP-207 is about 10 years old. When I turn on the power, it makes static noises from the speakers on the right side. How can I fix?


Thanks, Monica

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Nov 12, 2023
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starstarstarstarstar 		What is IC43 I/V CONVERT ? NEW
by: Pitus

Hi,

My initial "fix" for the static noise eventually, gradually, degraded until one channel lost all audio and now, after a couple of years, the second channel died in a similar manner - first some crackling noise then it's all gone no matter what I try...

The link http://cvpug.com/forums/showthread.php?t=3017 no longer works, it was supposed to explain the problem with DAC's and IC43 I/V CONVERT - which I'm not sure what it is?
I have two new DACs, but I don't have the expertise or tools to safely replace them :(
Also, it can be this IS43 not DACs that's failed - how can I test it?

As of now, all of the Analog section works fine - I can touch inputs 2 or 4 on A-LINK and I hear the brooming noise (but only when I unplug the wires leading to DM board. So it looks like the output from DM (on CN8) is shorted to the ground by IC43 ? As soon as I plug the wire in, the brooming sound stops.

Anyone has any ideas as to what else to try before hiring someone who knows how to replace the DACs ?
Jul 22, 2019
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starstarstarstarstar 		CVP-55 OPTIONAL IN RCA's static noise
by: Anonymous

Hello, I have some troubles with my CVP-55.
You can read here:

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

The problem is in OPTIONAL IN. When I put something via RCA then a lot of noise comes from the speakers and/or the headphones.

Can anybody help me? Thanks in advance
Jan 24, 2018
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starstarstarstarstar 		I've fixed my CVP-207 from noisy channel FREE & simply!
by: Pitus

If anyone else is experiencing the same issue - static-like noise coming out of one or both channels (in my case this started gradually, first the noise came out only after playing for 30 mins, then after 10 ... eventually right after turning it on)...

I've spent hours investigating this, tried replacing some parts in the power supply module, then traced the noise just to a single channel, coming out of the CPU board ... where, some say, you may have to replace D2A chips...

Well, As I was about to unplug the connector from IN/OUT module (blue wires in white connector), the noise disappeared ... then re-appeared...

So I started to trace individual wires and the problem turned out to be with a poor contact on one of the wires - the right signal wire coming out of the CPU board ... once I cleaned it up, plugged in / out several times... the noise has stopped permanently and I can play again :)

To get to the CPU board, you need to first unscrew the metal cover from it (be careful not to damage any cables), then locate a connector on the left side of the board and try to unplug it, then plug in several times ... or just try touching/pressing some of the wires in it to see if the noise disappears.

Good luck.
-Pitus
Dec 17, 2016
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starstarstarstarstar 		left speaker static
by: Janet

Parts still available. We have left speaker static issue. Any Technicians in Grand Rapids, Michigan area
Jul 15, 2016
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starstarstarstarstar 		static on cvp
by: Anonymous

I am an authorized Yamaha tech and have repaired many of the main circuit boards on CVP models.
More likely 2 chips will have to be replaced on the circuit and parts are available.
Sep 11, 2012
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starstarstarstarstar 		he damaged parts are integrated IC28, IC29, IC43 DM plate.
by: Bernal

The CVP-207.
The damaged parts are integrated IC28, IC29, IC43 DM plate.
I solved the problem so
(see link)

http://cvpug.com/forums/showthread.php?t=3017
Mar 30, 2012
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starstarstarstarstar 		static on the left speakers
by: alan

I have static on the left speakers, tested the speakers and they're fine. Must be in the control boards or amp? Anyone find help in repairing this, how much did it cost?
Jan 05, 2012
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starstarstarstarstar 		Static
by: Audiomagnate

The problem is in the reverb circuit, so turning your reverb off should get rid of the static.
Jan 05, 2012
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starstarstarstarstar 		Not a capacitor
by: Anonymous

No that is not the symptom that a bad electrolytic capacitor would produce. The problem is in one of the microchips on the the main board (not the amplifier board) and is basically unrepairable because parts are NLA. I had the exact same problem with a 153 SG which was returned from Yamaha unrepaired.
Dec 03, 2009
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starstarstarstarstar 		CVP 207 Speaker Static
by: Alfred

Dear Monica: I believe your unit is a "Direct-into-Wall-Receptacle type, in which case it probably has an internal Power Supply which converts The AC to DC. if so, the internal power supply may include one (or more) electrolytic capacitor(s)which could be failing due to age, and causing the static. Repair is usually simple but not for an owner to try. It's best left to a qualified technician, and you should shop around for a reputable one. Good luck.

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