Hi,Robert! I had watched this thread and here are my 2 kopeks: I would suspect "Reversed Pinning" situation:The Jack Center Pin rotates in the Bird Eye and is too tight in the bushing.. Re-pinning will take care of it. During repetitious playing the Center Pin heats-up and becomes too tight,when it cools-off-things are normal ,again.In that condition the center pin passes any test.. When your technician will do re-pinning,do the following; Upon removing the Center pin from the Jack,MEASURE the Pin 2]Select exactly the SAME SIZE Center pin and if you can push it inside the Jacks Bird Eye with your finger nail-it means it's rotating there..You must go to next 1/2 size larger Center Pin 3]Try to push that Original Pin in the Felt Bushing and it will ,probably,be TOO TIGHT I had found that "Reverse Pinning" in many brand new parts.. I hope,I made myself clear on that. Good Luck! isaac Sadigursky, RPT. Los Angeles Chaper.. On Feb 14, 2010, at 2:52 PM, <rsfinley at charter.net> wrote: > Here are some more observations on the intermittent problem with the > C6 on my Yamaha G1 Piano. > > When I play the key the first time, the note usually sounds, but if > I play repeatedly and quickly after that, it stops sounding. I have > to wait a few seconds after that for the key to recover, before it > will play again. It seems there is a delay of a few seconds when > part of the action is slowly getting back into the position when the > key can be played. I am puzzled why there is this delay. > > When I take the action out and put it on a table, I cannot reproduce > the sticking key effect for C6, even if I simulate the presence of > the string using a hard book held some distance above the hammer (of > course the hammer will not rebound in the same way as for a string). > I can cause the hammer to move in fast repetition without any > blocking effect. The sticking key effect only occurs when the action > is back in the piano. Although I doubt it, I am wondering if this > is a combined effect of the damper and the action causing this > sluggish operation, although the damper for C6 seems to be working > fine. > > When I look at action for C6 (difficult to see everything due to the > proximity of the actions of the other keys, everything appears to be > intact. I haven't removed the whippen assembly for C6 yet to > examine it in detail. Maybe I should do that. > > Could anyone throw more light on this? Thanks for your advice. > > Robert
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