Yamaha problem

[Ron Torrella]

We had the same problem, here. In tour case, the screw that supposedly
stabilizes the action rail was bent and the rail, itself, was bent. According
to Yamaha, that's because the piano was dropped (on its bottom). There's no
support *beneath* the stack, so there's a tendency for this to happen. On the
back of one of the recent Journals, there's a "tech tip" from Yamaha that
explains the problem (and a solution?).

I noticed, yesterday, while tuning a new U1, that there's a different
configuration at that strut. It looks like the stack is now sort of retained
by a horn-like protrusion in the plate.

You should contact the dealer, if the rail looks bent. It should be covered
under the warranty. At the very least, the dealer should have caught the
problem when the piano was prepped.

Ron Torrella

Mark Cramer wrote:

> Adjustment screw that spaces the action frame away from the plate (in lieu
> of the two middle action brackets) tight?  This bolt helps keep the action
> fram from flexing.
>
> Mark Cramer, RPT
> Brandon University
>
> -----Original Message-----
> From: owner-caut@ptg.org [mailto:owner-caut@ptg.org]On Behalf Of Avery
> Todd
> Sent: Wednesday, September 13, 2000 7:42 AM
> To: caut@ptg.org
> Subject: Yamaha problem
>
> List,
>
>    I have one of our U1D's (1972) in the shop right
> now and have a problem I haven't, as yet, been able
> to figure out. So, thought I might get some help
> here. :-)
>    The problem is that the damper lift with the pedal
> is like a hanger is broken on the rod, i.e. the dampers
> from the lower middle of the bass up to the lower tenor
> area hardly lift at all. The remaining ones lift fairly
> well, even though not quite evenly. The bichords hardly
> even move. What throws me, is that with the action out
> of the piano and lifting the pedal rod by hand, they all
> lift pretty evenly!
>    I did notice that the bass end is not seated real well.
> There is a very slight movement and a slight noise when I
> "wiggle" the bottom of the bracket with my hand. It seems
> to be minimal though and I will be adjusting it. But it
> doesn't seem like that would be enough to cause the
> problem.
>    What am I missing? Is there something flexing somewhere
> that could be causing this? This is one of those actions
> with only 2 action brackets, bass and treble.
>    I really DON'T want to do a damper wire bending job and
> then discover the problem later and have to redo it!! :-)
>    Any ideas? Thanks.
>
> Avery