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I lost the use of some keys on the upper key board on my organ its elka ep 8 . 6 white and 6 black keys in the middle c range.

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Go to the following address and you will find the solution!!!
http://www.youtube.com/watch?v=zpZZCNcqtl0

Posted on Oct 19, 2013

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Posted on Jan 02, 2017

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SOURCE: keys 7 and 8 from the bass side are lower than

In Casio Chord mode, the bottom keys up to the second F plays Bass Chords. The Keyboard is just putting the keys you play back into bass when you get up that high. If you read along the plastic edge above where they keys come out of the keyboard, it shows you where the Chord keys end and the Keyboard begins. If you want use of all the Octaves, slide the power switch to the first setting (normal).

Posted on Feb 17, 2010

  • 5603 Answers

SOURCE: very littel sound in white and black keys. normal

We can only guess at what model/brand you have.

OFTEN such low volume things can be traced to a burned out light used in some expression pedals that use light dependent resistors to vary the volume.

Be aware that on some organs things like rhythm drums MAY go through a different set of speakers and amps than the other voices.

Posted on Apr 30, 2010

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SOURCE: The Electone FC 20 organ's

Likely one of the cables to that manual has either oxidized contacts or come loose. This could be at either end of the cable. With it in "failed mode", try wiggling the cable(s) going to the upper manual and the problem MAY show itself.

Posted on Aug 15, 2011

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1 Answer

Why lower keys dont come on , on a kimball model 700-775


I think you are speaking of an organ.
Your organ has electronics inside it, and I believe the circuit board for the lower keys has a broken connection.
You should find an electronic organ repair place.
I just looked online and found several places.
Since you may be near to none of these, relay on your computer to find someone who can repair this circuit board.
They will have to tell you how to take it out of your unit.
God bless your efforts.

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How to fix loud key on Privia PX-830


I just fixed mine, it was making the loud sounds and had seemed to have lost the sensitivity. Take out all the screws on the outside, then the sides can come off. That gives access to the inside where you can take out a few more screws (easily seen) and open it all up. The keys themselves just snap in, so two small screwdrivers or strong fingernails can pop them back out. Clean the rubber contacts (they look like little sockets) with Q-tips and rubbing alcohol, then replace the keys. If you take out the white keys of an octave first, then the black keys (keeping them in order) it is a lot easier.

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The b key strikes to hard, so there is any touch resopnce on the middle B key, what can i do to fix if?


You will have to clean the keyboard touch pads. its a pain full job because one has to remove at least 50 screws before one gets access to the key pads. Remove the back cover and make a note of what screws goes ware.Then remove the screws that hold a long circuit board over the keyboard ( lots of small screws ) . Invert this board and clean the black carbon tracks as well as the rubber key pads with solutions like WD40. Install it back in the reverse order making sure you put all the right screws in the right place. Should work fine after that until dust again gets in between.

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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.

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I have a yamaha PSR 240 and one of the keys (E) won't make a sound. Everything else works perfectly except for that. I could not find a category for yamaha keyboards or musical instruments.


Yep, a key contact has got contaminated... You have to disassemble the unit to expose the keys.

You have to remove the offending key which is OFTEN tied to a bunch of keys. Under the keys you will find strips of silicon rubber with little domes sticking up. Under the domes are two contacts, either two black conductive rubber or sometimes a ring with a pill in the middle. These contact circuit traces with a black coating on the board under the keys. Clean the pills AND the circuit traces GENTLY with ONLY 99% isoprophyl alcohol. Reassemble the keys and the unit.

Be very careful handling, especially the ribbon cables between teh upper and lower halves of the unit.

Note there are TWO contacts per key which one closes before the other and that is how the key velocity is measured by the processor.

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1 Answer

Very littel sound in white and black keys. normal


We can only guess at what model/brand you have.

OFTEN such low volume things can be traced to a burned out light used in some expression pedals that use light dependent resistors to vary the volume.

Be aware that on some organs things like rhythm drums MAY go through a different set of speakers and amps than the other voices.

Apr 30, 2010 | Music

1 Answer

The pedal keys doesn't work, no sound coming out of the upper notes of the pedel keys.


We can only guess at what type, model, and brand of instrument you have.

This is probably some type of organ... however there are many types.

IF the pedals are part of the main body of the organ, I would suspect a broken wire.

If it is a console organ, often the pedals have tabs that actuate switches. Often people place thess on a rug which CAN block the pedal from moving far enough.

Another thing is that SOME voices that can be used by the pedals on some organs do NOT span all the pedals because the instrument being emulated won't go that high in pitch.

Feb 08, 2010 | Music

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It's a Roland HP-7e digital piano about three years old.


You may need to clean the contacts which are usually conductive rubber. I explained stuff for another Roland problem with two keys that were intermittent. I have an EP-7 that I had to do the cleaning of the key contacts. Use 91 or 99 % Isoprophyl alcohol to clean BOTH the conductive "pill" (Black under silicone rubber domes) AND the traces on the board where they press. Clean gently as the traces have a hard black coating.

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