Question about Yamaha MM8 88 Key Synthesizer Workstation

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How to repair a dead key?

One of my keys doesn't work anyone, there's just not coming any sound out of it. I'd like to know how to repair it

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Posted on Jan 02, 2017

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SOURCE: key doesn't work properlyon yamaha p95 piano

take it back, its still under warranty. That means the key has a contact problem in the circuit. you have to take it all apart, clean it, check the contacts....probably lint. You can try vaccumming it and it might fix the problem. I bought one too and it wasnt good

Posted on May 07, 2012

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Casio privia px350. My dp started to have mechanical stronger noises when pressing down the keys affected seem wobbly and seem to hit something as if moving sideways slightly. Only tapping the key...


The Previa key construction was a lot better than yamaha\'s, however it still suffered the normal casualties caused by even the slightest \'knock\'. Believe it or not, most damages are caused to DPs when you\'re NOT playing it. For example, transporting - setting up - packing down etc. I used to market Roland and Casio DPs for a number of years. And the most common problem was the \'stuck key\' syndrome (as well as dust on the contacts). I bought it down to the way people, children, adults actually SIT down to the piano to play. Instead of using the piano stool to balance themselves, many people place their hands on the KEYBOARD before they plant !!! NO NO NO :/ That is the prime reason there are key breakages in - pretty much the same place. Children are a classic example when they sit at a piano. They use the keyboard to leverage themselves UP. Because the DP is not on, it doesn\'t make a sound - therefore "it can\'t POSSIBLY my child\'s fault!!" Oh yeah...have your darling angel sit at an acoustic piano and they\'ll be playing 12th Street Rag before they even get their on the seat!!!



Long and short, possibly broken band, slipped hammer - or broken. Here\'s a video which explains how you might be able to fix the problem yourself. Not much to it really...just take your time and don\'t force anything

https://www.youtube.com/watch?v=_uToVbDDVC0



Regards



Sam

Jun 10, 2014 | Music

1 Answer

Fixing stuck keys on casio wk 200


Sounds like either the contacts are dirty or worn out. Solution clean / replace.

Jan 07, 2013 | Music

1 Answer

I can hear only one side of the sound coming out from Korg triton extream keyboard. It's not the cable problem for sure. i tested both the earphone out put and the Left and right out put. Did a


So you're saying with headphones you also only hear one side? I would suspect the internal amp is panned all to one side. There are also several other settings in this unit where pan can be set so you may have to check several areas. If you don't have any specific custom settings made I would try a restore to factory defaults. If that doesn't resolve it you likely have a hardware failure which is likely not repairable. I strongly suspect a panning issue though.

Aug 18, 2012 | Korg Music

1 Answer

Key doesn't work properlyon yamaha p95 piano


take it back, its still under warranty. That means the key has a contact problem in the circuit. you have to take it all apart, clean it, check the contacts....probably lint. You can try vaccumming it and it might fix the problem. I bought one too and it wasnt good

May 07, 2012 | Yamaha P-95 P95 DIGITAL PIANO BLACK

1 Answer

Problem with casio CTK-691 keyboard


"can I do it my self or should I go to a professional to get it repaired"?
Get it repaired by a professional. Casio gives long warranty (5 years in Australia). Mine took weeks for Casio Service to repair. Many boards had to be changed.

Jan 25, 2012 | Casio Ctk691 Keyboard

1 Answer

Ok i was playnig on my celviano ap-620 and then 8 of the keys started to sound rare, very loud, it seems like it lost the key touch sensivility on those keys from the center (C) and 8 keys down i tried...


What has happened is that one signal wire of the matrix that scans the keyboard has opened up. Each key has two contacts. One closes before the other and that is how they measure key velocity to control the loudness for piano sounds for example. When one contact doesn't work, often the sound is set to MAXIMUM key velocity resulting in MAX loudness. The key contacts are scanned digitally in groups of usually 8 or 12 and, for instance, every C key has a single line attached and then every group of 8 or 12 has a second line and then there are two complete sets of these to implement the velocity sensing. Your unit probably has either a break in a cable or possibly a cable connector that has failed or not seated OR worst case, the circuit board under the keys has a crack breaking one wire or circuit trace going to that section of the keys. The problem will require opening the keyboard to repair. If you are not electronically adept, besst to take this to a repair shop.

Aug 14, 2011 | Casio AP-620 AP620 Digital Cabinet Piano...

1 Answer

When I turn on my xk1, I get no sound, no response from any buttons, keys, drawbars or knobs. I have tried the factory reset and it doesn't work either. What else can I do before I return it to the...


Take it to the store and have them test it... don't be surprised if there is a simple thing that has been overlooked. If it doesn't worked there, it needs to go in for servicing so that is the logical course to follow anyway.

Aug 06, 2011 | Hammond XK1 Pro Drawbar Organ

1 Answer

Some key in my xp-50 doesn't work,same as midi signal? Rich


Since you haven't told us much information, I can only suggest you check the TRANSPOSE settings. These cause the keys to shift left or right INCLUDING the black keys.

Aug 05, 2011 | Music

1 Answer

Hi, I hope can help me with this problem because I start to get desperate. I have a Clavinova CVP-85A. The sustain effect is always activated, whether the pedals are plugged in or not. I read that to...


It sounds like the inputs from the pedal switches are "floating", that is, not pulled up or down and they are drifting across the logic threshold. If I could find a schematic I could direct you right to the problem. For now, check the voltage across the switch contacts with a high impedance meter. Also check the resistance to ground of the common of the contacts. Without a schematic I am afraid to have you try things lest I direct you to do something that would cause damage.

Jun 07, 2011 | Yamaha Music

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