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#631512 - 01/26/02 08:59 PM A question on the Yamaha U3
Peter Offline
Full Member

Registered: 12/18/01
Posts: 20
Loc: Australia
Hello all.

I'm not a technician, but I was hoping your expertise could help me with a problem I have been having with my Yamaha U3.

I've only purchased it recently and it is 20 years old, and there seems to be a fair bit of vibration noise when striking the keys, particularly in the lower keys.

This problem seems to come and go with the weather, especially when it is cooler, and renders the piano unplayable occasionally as it is very annoying.

The technician has been back once to have a look at the problem, but the noise quickly came back.

I've found that applying a bit of pressure on what appears to be a 3" strip of aluminium (sorry I don't know the name) behind the action stops the vibration.

Does anyone have any ideas what may be the cause of the problem here? Is this a major problem?

Thanks in advance for your time, and I hope I have provided enough information for your to help.

Thanks again.

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#631513 - 01/27/02 01:11 PM Re: A question on the Yamaha U3
reblder Offline
1000 Post Club Member

Registered: 10/21/01
Posts: 1237
Loc: Sherman Oaks, Calif.
These sorts of disturbances are indeed rather annoying as they are quite often intermittent and the changing weather can easily be responsible.

Best thing is to have the tech come out at the time the problem acts up. And I'm addressing this as a tech who knows only too well the frustration of having been on a service call for something like this and the problem mysteriously vanished before I got there(and have to assume returned after I left).

Mark Mandell www.pianosource.com

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#631514 - 01/27/02 05:48 PM Re: A question on the Yamaha U3
reblder Offline
1000 Post Club Member

Registered: 10/21/01
Posts: 1237
Loc: Sherman Oaks, Calif.
These sorts of disturbances are indeed rather annoying as they are quite often intermittent and the changing weather can easily be responsible.

Best thing is to have the tech come out at the time the problem acts up. And I'm addressing this as a tech who knows only too well the frustration of having been on a service call for something like this and the problem mysteriously vanished before I got there(and have to assume returned after I left).

Mark Mandell www.pianosource.com

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#631515 - 02/03/02 04:04 AM Re: A question on the Yamaha U3
Peter Offline
Full Member

Registered: 12/18/01
Posts: 20
Loc: Australia
Thankyou for your reply, Mark

The technician has been to inspect the piano and tightened a few loose screws on the action and the centre thing that secures the action to the frame. (Sorry, I don't know the name of it).

Well that seemed to fix the problem, at least for a few days. But it did come back. After calling the dealership, the owner came to inspect it, taking the action out and tightened more screws. He claimed that the "noise" I was complaining about was simply normal action noise and the acoustics of my room didn't help the situation.

After the owner had left, I found that I could very easily stop the "rattle" by loosening the centre pin. Now I've been led to believe that the 3 pins are meant to be relatively tight to hold the action in. When it is tightened though, I get the noise. Do you think this could mean possible problems with the soundboard? This is all I can think of, and I am more than certain the sound has absolutely nothing to do with regular action noise.

While the dealer told me this is normal for U3's, he offered a replacement model (another used U3). What do you think of this situation?


Thanks again,

Peter Dale.

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#631516 - 02/03/02 12:54 PM Re: A question on the Yamaha U3
reblder Offline
1000 Post Club Member

Registered: 10/21/01
Posts: 1237
Loc: Sherman Oaks, Calif.
Peter--

Yes, I'd consider accepting the owner's offer to exchange your U3 with another. While the U3's by and large are fine uprights, you might have one that has a particular glitch in it that would necessitate a rather lengthy investigation into the cause of that noise and your residence may not be the best place for that.
When the piano is returned to the store, the tech there can then commence with this(possibly)painstaking procedure.

Mark

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#631517 - 02/11/02 10:09 PM Re: A question on the Yamaha U3
Christopher Stubbs Offline
Full Member

Registered: 12/20/01
Posts: 27
Loc: Wales, UK
Try adjusting the damper slap rail, as it can be easily overlooked. Hope this is of help.

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#631518 - 02/14/02 06:04 AM Re: A question on the Yamaha U3
Peter Offline
Full Member

Registered: 12/18/01
Posts: 20
Loc: Australia
rebuilder, Christopher,

Thankyou for your help. A different technician checked my problem out, and thankfully fixed it.

He took the action out, and tightened the centre screw (or bolt) that the action rests upon... Problem solved!


Thanks for your help. Greatly appreciated.

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