mystery click puzzler

[Farrell]

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Definately a puzzler. Did you look for gum on the backside of the =
fallboard?   ;-)

And no, you are not stupid. You are correct. It can't click on the key =
downstroke!

Terry Farrell

P.S. I like your writing style - very clear and entertaining!
  ----- Original Message -----=20
  Here's a puzzler for you all; an unsolved puzzler at that.  I've =
executed a repair, but I have no idea why it works...

  Kawai grand, about 15 years old.  There's a click on F#2, G#2, and A#2 =
when the key is depressed.  Not when it's released but at the moment =
they're depressed quickly.  (It won't happen on a slow strike.)

  I take the action out to check for loose screws, debris on the keys, =
any anomaly, but nothing.  In fact, the click is gone.  I did tighten =
one screw on one of the action rails, so, maybe that was it...

  Put the action back in, still no click.  Reinstall the cheek blocks, =
still no click. =20

  When I put the fallboard back on, there's the click again.  Pull the =
fallboard forward to a 45 degree angle, no click.  Back to vertical, =
click,

  OK.  The keys must be hitting the fallboard, but wait a minute.  It =
happens when the key goes down, not up.  The fallboard does not extend =
backwards inside all the way to the back side of the balance rail, so =
when the key goes down, there is MORE clearance from the fallboard.  If =
the click was on the way up, I'd say it was hitting the fallboard when =
it returned to the up position, but it happens on the way DOWN!

  Am I just stupid?  Am I missing something here?

  My solution?  I raised the fallboard so that there was more clearance =
from the keys and now there's no click.=20

  But how can the keys strike the fallboard on their way down and make a =
noise?  It doesn't make sense.

  It's not the upstop rail being depressed by the fallboard (That click =
would happen on the way up, too.).  I put felt on the backside of the =
fallboard at the point where the keys would come into contact with it if =
that was the problem to see if that changed the sound or eliminated it,, =
but it didn't have any impact.

  I guess I should move on, because I fixed the problem.  But  I just =
want to know: what caused the click?

  Any ideas? Did I describe this well enough? =20

  Tom Sivak
  Chicago 
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