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My C-15S Korg Concert Piano has no sound. Left to right volume switch seems not to be working.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Manuals for Concert Piano Korg C-15

I have a Korg Concert Piano (C-15S) which was working perfectly till about two months ago. I have been on vacation for two months, had left the piano unplugged from the electric supply point, but on re-connecting now, I get no sound from it. Is there a reset button (or other device) that I may have to use? Appreciate your advice.

Thank you,

L. Paul

Posted on Aug 06, 2009

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SOURCE: korg C-15 S concert piano

ik heb 20 jaar geleden een korg c 15 piano gekocht voor 5000 nederlandse guldens.
we zijn tot nu toe nog steeds tevreden met de piano.
sinds een paar dagen wil hij niet meer hard spelen ,je hoort hem alleen nog maar in de verte .
alles is goed aangesloten ,schuifje staat op zijn hardst en er staat ook stroom op ,want het lichtje brand .
kan iemand mij vertellen wat ik daar aan kan doen ,ik wil hem nog niet kwijt ,misschien is het maar een kleinigheid.

vriendelijke groet

mevr v haasteren

Posted on Sep 13, 2009

smartr10U
  • 1305 Answers

SOURCE: I have a Korg concert piano model c-303. have

You can wiggle the switch around to see if you get any response... You may also want to make sure that you are plugging it in without reversing the polarity. I had one of my synths act up really wierd and scramble the display, etc, until I found I was using a cheap extension cord and had the polarity reversed... the electronics didn't "play well" with this scenario.
If this model has a powerpack on the cord, that may be the culprit as well. If it is just a straight a/c cord, the "powerpack" so to speak, is in the unit and may be going out...
Hope this narrows it a bit for you...

Posted on Nov 20, 2009

  • 2 Answers

SOURCE: I have a korg C15S concert piano. does anyone know

Make one

Posted on Jan 25, 2011

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1 Answer

Some keys on the left side are not giving sound when played and the master volume is loosing can it be fixed or should i have to buy a new master volume


It's about hardwares.
Wiring connection sockets is loose.
Inside the korg PA50,Wiring connection to the keyboard is separate to left and right.
Open/disassemble your korg.
Look for connection cable to the left keyboard.
One end is on the keyboard,the other end is at the mainboard.
Unplug both of it, then mounted again.
For master volume,better buy new one.

Jul 31, 2013 | Korg Pa50 Professional Arranger Keyboard...

1 Answer

Crackling speaker as soon as i switch on my digital piano


It looks like the Korg c-15s has a internally mounted speaker and so I will assume that the speaker and amplifier are part of the piano base. It sounds like either the speaker is blown (crackling sounds heard as deformed voice coil scrapes the magnet structure) or the audio amplifier is distorting the audio.

Connect the piano's output to an external amplifier and speaker to properly identify problem.

Oct 17, 2012 | Korg Music

1 Answer

I need manual for korg concert 3500


From the original site of korg (http://www.korg.com/Support) there is nowhere the model u r describing.Please make sure u have posted the correct model description.

Aug 01, 2012 | Korg Music

2 Answers

My korg c26 does not make any sounds intermittently


I have try that but it sound n stop

Jun 19, 2012 | Korg Music

1 Answer

I have a Korg C-15S Piano that i just recently changed the fuses to becasue it wasnt turning on. After I changed the fuses it turned on for a bit and was working great. Later when I tried turning it back...


Unless you are adept at electronic repair, this is probably NOT a DIY thing for you. Likely there is a problem in the power supply of the unit. Replacing the fuse MAY have blown something open for a bit but there is a residual problem thaat needs to be repaired. You MAY be putting the expensive portion of the unit at risk by replacing fuses while problem still exists. I would have unit repaired ASAP. If you do not have test equipment, then the ONLY DIY repair for you would be to replace the power supply as a unit rather than bad components. This MAY be the most economical solution for you.

Dec 12, 2010 | Music

1 Answer

My Korg c15s has a lot of grating staticky noises when played ....I'm told it cannot be repaired as Korg no longer makes parts for this model?


I have a Korg C-15s and also experiencing loud crackling sounds when I turn it on. The problems seems to be either the sliding volume control or the amplifier itself. Honestly though, I believe the issue is the volume control. I opened my piano to get a closer look and attempted to clean the contacts on the volume. Unfortunately after cleaning the contacts, the crackling sounds became somewhat worse. After I turn the piano on, the volume control is generally rendered useless......volume set to low volume and the noise is quite loud and other times the volume control is set high and get very low volume crackling noise. No real consistency. The noise does diminish after a few minutes but so does the piano sounds to an inaudible level. There were a couple of instances where I turned it on and surprising enough, no no noise and perfect sound. For these reasons I believe the issue is within the volume control and not so much the amplifier. I have an electronics background and noticed that the volume control is very unique in design and is not something that can be substituted with another volume control from other sources.

My recommendation is to check the sound quality of the audio from the RCA L/R audio outs on rear of the piano by connecting to a stereo receiver. If it sounds fine you're in luck. If the crackling sound does not diminish after a few minutes like mine does, I would suggest disconnecting the internal speakers and using the audio out only. You can connect a pair of studio monitors or high quality computer speakers, preferably with a small subwoofer to deliver the full audio range and deeper tone of a real piano. I'm currently using a basic pair of Logitech computer speakers and is quite acceptable until I can afford a high quality set of monitors or relocate my piano closer to my high quality Yamaha receiver.

I hope this info helps a bit.

Aug 18, 2010 | Yamaha Full-Size Keyboard

1 Answer

Korg C-15 S concert piano


ik heb 20 jaar geleden een korg c 15 piano gekocht voor 5000 nederlandse guldens.
we zijn tot nu toe nog steeds tevreden met de piano.
sinds een paar dagen wil hij niet meer hard spelen ,je hoort hem alleen nog maar in de verte .
alles is goed aangesloten ,schuifje staat op zijn hardst en er staat ook stroom op ,want het lichtje brand .
kan iemand mij vertellen wat ik daar aan kan doen ,ik wil hem nog niet kwijt ,misschien is het maar een kleinigheid.

vriendelijke groet

mevr v haasteren

Aug 24, 2009 | Yamaha Full-Size Keyboard

1 Answer

Need help connecting Korg C-303 (Concert Piano) and Korg Symphony Model O3 (Orchestra Module). Have no documentation for the Symphony module.


Assuming the C-303 has a MIDI out, connect a MIDI cable from the MIDI output of the C-303 to the MIDI input of the symphony module.

Connect two audio cables (mono 1/4 inch) from the symphony module to a suitable audio amplification system OR possibly into auxilary audio input jacks of the C-303, if they exist.

I have a Symphony module but not the piano you have and I have mine connected to a Yamaha organ.

May 12, 2009 | Music

2 Answers

Manuals for Concert Piano Korg C-15


I have a Korg Concert Piano (C-15S) which was working perfectly till about two months ago. I have been on vacation for two months, had left the piano unplugged from the electric supply point, but on re-connecting now, I get no sound from it. Is there a reset button (or other device) that I may have to use? Appreciate your advice.

Thank you,

L. Paul

Apr 03, 2009 | Yamaha Full-Size Keyboard

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