U1 Buzz

[Stephen Powell]

Earlier this year came across a U1 with a bad buzz on just a couple of
notes.  Previous tech said the piano needed a new soundboard!  After
tightening everything that I thought might be relevant, and scratching my
head for a few minutes, took my dental inspection mirror and light and found
an action screw with washer wedged between plate and soundboard.  With
customers watching, took my long tweezers and removed it like a surgeon
removing a bullet!  Happiness all round!

Stephen Powell RPT
"Excellence in Action"
Auckland, NZ


> I'm having trouble finding the buzz on a new Yamaha U1.  It was delivered
a
> week ago and the owner complains about a buzz when the a5 key is played.
>
> I noticed the following:
>
> The buzz comes from the bass section, more evident around the center of
the
> action.
> The buzz does not go away after I mute all bass strings and the a5
strings.
> I tightened (just a little) all flange screws.
> I checked all other screws - none that are loose.
> I removed the pedal rods - buzz still there.
> I took the fallboard out - still there.
> The buzz is considerably dampened when I push the B-flat2 hammer towards
the
> strings.
> I'm about ready to give up.
>
> I would appreciate any feedback!
>
> Jay Mercier
>
>