[pianotech] Kawai puzzler

[Wally Scherer]

Be sure to sell them a string cover so this doesn't happen again!

Wally
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Wallace T. Scherer, piano technician, music educator
Serving professional and amateur musicians since 1979
5020 Canal Drive, Lake Worth, Florida, 33463-8014
Telephone: 561-432-4121
Web page: http://aftune.angelfire.com
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--- On Sat, 1/28/12, Ron Koval <drwoodwind at hotmail.com> wrote:

> From: Ron Koval <drwoodwind at hotmail.com>
> Subject: [pianotech] Kawai puzzler
> To: pianotech at ptg.org
> Date: Saturday, January 28, 2012, 12:15 PM
> 
> Some detective work for this Saturday morning:
> Piano - Kawai NS-20 - tall upright with one of those split
> lid fold back tops.
> 
> Complaint - some damper ringing randomly....  Owner
> couldn't replicate the problem earlier this month during
> the regular tuning visit, so I asked if theycould find out
> what note(s), during what pieces.
> Went back today after I was notified only C4 happened
> sometimes...
> So - noticed an old coffee spill leaked between the split
> top down onto the muffler rail and then farther down...
> right at C4. Piano w/plenty of plastic parts.
> Took out the action, still couldn't make the damper hang...
> Reversed it, gently pressing on dampers - C4 felt
> "different" - harder to push.
> Turns out the spring was glued to the damper lever by the
> spill.  Along with a mess on the spoon.
> Cleaned, lubed - everything seems fine, but for the life of
> me, I can't come up with a reason why a constrained spring
> would make the damper hang up and ring???
> Hmmm..
> Ron Kovalchicagoland
> www.ronkoval.com    
>         
>           
>