Kurzweil SP76 piano - loud A-flat

[bass_dinger]

I have a Kurzweil SP76 piano.  It is touch-sensitive (or rather, velocity sensitive).  The harder I hit the key, the louder it is.

 

However, since this morning, the A-flat below middle C is always at maximum volume.  Any ideas on what the problem might be, and how to fix it?

[BassTractor]

On 10/05/2025 at 12:23, bass_dinger said:

I have a Kurzweil SP76 piano.  It is touch-sensitive (or rather, velocity sensitive).  The harder I hit the key, the louder it is.

 

However, since this morning, the A-flat below middle C is always at maximum volume.  Any ideas on what the problem might be, and how to fix it?

Now I don't know the Kurzweils specifically, but it probably has a type of hammer and a sensitive pad underneath (I don't know the right terminology here).
This pad then probably is knackered - - not necessarily after impact: tmight be dirt or corrosion or whatnot - - and in case needs a repair or replacement. You could try opening it. As said, I don't know the specifics of these.

Me, I'd open the piano and, if all of the pads are identical, I'd simply use the pad for a non-used key on the dusty end, moving it to the position in question.

You might also be able to get a new pad from the importer. However, I tried similar for my Roland, without success for half a year, so this might be trickier done than said.

Best of luck whatever way you choose!
bert

 

 

Edited May 11 by BassTractor

[bass_dinger]

Thank you, @BassTractor. Other Internet searches suggested the same issue, so I need to pluck up the courage to take the piano apart, and look at the pad beneath the A-flat.

 

More likely, I will contact a repairer that I know, and ask him to look at it - I am not a bold or confident fixer of things. 

[bass_dinger]

On 10/05/2025 at 13:05, BassTractor said:

might be dirt or corrosion or whatnot

 

It could indeed be dirt.  This video suggested that I can take the keyboard apart, and clean it.  However, I am not sure that I have the courage to try it, yet.