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spelti
Joined: 06 Jan 2008
Posts: 1
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 Posted: Sun Jan 06, 2008 7:45 am Post subject: key velocity problem |
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| I have a qs6.1. one key (middle c) sounds at full volume when you press it All the other keys are pressure sensitive. This happens on all programs. I have background in electronics, so I'm not afraid to take it apart. Can anyone help? |
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davyyd
Joined: 21 Jan 2008
Posts: 3
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| Posted: Mon Jan 21, 2008 5:41 pm Post subject: |
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I've used this method to fix my QS8 and an old Roland digital piano.
You have to get under the dead key. There you will find a rubber pad with a pair of soft contacts underneath where it makes contact with the circuit board when the key is struck. I've found that loss of velocity sensitivity happens when the rubber pad is either dirty or folded and held in a certain position.
Carefully pry the pad up and use compressed air to lightly blow away any dust or dirt. Place the rubber pad back down, making sure it is nice and snug (I believe there are four tiny rubber posts on the pad that go into tiny holes on the circuit board).
I wouldn't rub or wash the rubber pad, since the conducting material on the bottom could be worn away.
I hope you get your key working again.
David |
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jimmyray
Joined: 06 Feb 2010
Posts: 1
Location: Melbourne, FL
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| Posted: Sat Feb 06, 2010 1:57 pm Post subject: |
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| davyyd wrote: | I've used this method to fix my QS8 and an old Roland digital piano.
You have to get under the dead key. There you will find a rubber pad with a pair of soft contacts underneath where it makes contact with the circuit board when the key is struck. I've found that loss of velocity sensitivity happens when the rubber pad is either dirty or folded and held in a certain position.
Carefully pry the pad up and use compressed air to lightly blow away any dust or dirt. Place the rubber pad back down, making sure it is nice and snug (I believe there are four tiny rubber posts on the pad that go into tiny holes on the circuit board).
I wouldn't rub or wash the rubber pad, since the conducting material on the bottom could be worn away.
I hope you get your key working again.
David |
Hello, I just bought a QS8 and I realize that my "problem" may be simply due to wear and tear since it is obviously NOT new. The problem is that although all the keys work, there are a few keys--maybe one out of dozen or so--that require CONSIDERABLY more pressure to trigger sound. Most keys respond to very light touch whereas certain keys simply don't respond when a lightly struck run of notes is played. A slightly stronger attack and they play fine. Anyway, I'm wondering if anyone else has noticed this and if there is a way to correct it (by cleaning or adjusting) or if it is just a general wearing out of things that I'll need to live with. I'm very comfortable disassembling anything (I'm an electrical engineer who rips into ALL manner of things). I've tried different sensitivity and keycurve settings but that doesn't affect this symptom. Any help or suggestions greatly appreciated!! Thanks!! --JimmyRay |
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