Korg stage piano - 1 key sounding at max velocity.

JJV

Does anyone know how easy it is to fix a key that is constantly sounding at full velocity on a Korg SP200 stage piano (weighted keys). I'm playing the piano for a college production but the problematic triple forte E appears in a number of pieces & is quite disconcerting for me & no doubt the audience when the run begins.

Any suggestions very welcome.

www.jjvernon.com

studiorat

JJV wrote: »

Any suggestions very welcome.

Just play the others louder. ;o)

PMI

Have you had it apart yet? and looked for obvious shorts or anything

PaulBrewer

Just call Korg!

dfkorg

Contact Korg UK at

00441908857100

and ask to speak to the service department. They should be able to help with any queries

JJV

dfkorg wrote: »

Contact Korg UK at

00441908857100

and ask to speak to the service department. They should be able to help with any queries

Thanks for that. Will do tomorrow.

www.jjvernon.com

ev612337

Probably a fault with the keypress registering as a full hard hit. Likely to be a problem with the membrane under the key which sits on the PCB. With due care and a suitable screw driver, you should be able to strip the keyboard down to this level and examine the contacts on the membrane. Careful cleaning may solve your problem.

PaulBrewer

ev612337 wrote: »

Probably a fault with the keypress registering as a full hard hit. Likely to be a problem with the membrane under the key which sits on the PCB. With due care and a suitable screw driver, you should be able to strip the keyboard down to this level and examine the contacts on the membrane. Careful cleaning may solve your problem.

Actually now you mention it ..... wasn't that a common problem on SP300s a few years ago ?

ev612337

Hi again Paul,
Yes you're right. In fact, it's a 'known issue' with several models. And, they're not all Korg either just for the record... I've seen it with various Yamaha and Clavia models too for example

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cant help,

but nice composing work I must say .

ZV Yoda

DaDumTish wrote: »

but nice composing work I must say .

I have to agree... and nice to see what can be done with sampled instruments. I really liked the piece you did for the BBC wildlife documentary. Good stuff...

JJV

Well I rang Korg Service Dept. They were most helpful & gave the same advice as ev612337 - strip it down & see if there was dirt on the pressure sensor under the faulty key, if so use isopropyl alchohol to clean it.

The trouble was once the case was opened there was no easy way to remove the keys & expose the sensors underneath. There appears to be a rod travelling through all the keys attaching them together with no easy way of removing the rod or detaching individual keys from it. So with a show approaching that evening we decided to put the keyboard back together & I transposed all the pieces with an E in them to different keys!

Thanks for the kind words about the compositions on my web site.

Now, does anyone know about the faders on the Yamaha 01V? One of the faders will not travel all the way to the top & when the desk turns on it alerts us to the dodgy fader. Other than that the desk works great.

College gear certainly takes a hammering.

www.jjvernon.com

ev612337

Hi JJV,
There is quite a bit of stripping required to get to the point where you can remove, examine and clean the necessary bits alright.
On the 01V, the problem is likely to be a worn fader.
I can sort both units out for you if you wish. See my web site: www.fixtronix.ie
All the best,
Dave