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Oscillator Tuning (Scaling)   Message List  
Reply | Forward Message #258 of 482 |
Re: [korg_mono-poly] Re: Oscillator Tuning (Scaling)

Yeah, I did that awhile ago but in the course of him fixing that problem another problem arose and I ran out of money so now I have to fix it myself.

Now I hear a constant FM like sound on the whole machine (especially when the cutoff and resonance are at maximum level).  I have gone over some of the machine with an oscilloscope and it is very obvious that something is wrong in the power supply.  I believe that a component has failed and is causing more something to try to draw more current than it should which is creating the noise.  So now I am changing the capacitors, op amps, and voltage regulators and if that does not work, then I am out of ideas.

Thanks,
Chase

envia94 <akva@...> wrote:
Maybe you should contact a professional synth repair man. It will ofcourse cost a little, but
save your own time to a profitable work.




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Sun Dec 23, 2007 12:45 pm

plus_321
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Message #258 of 482 |
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Hello, I recently acquired a mono/poly that has oscillator 1 out of scale. I've read the calibration procedure in the service many and I'm not sure if I am...
plus_321
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Sep 9, 2007
11:59 pm

Maybe you should contact a professional synth repair man. It will ofcourse cost a little, but save your own time to a profitable work....
envia94
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Dec 23, 2007
11:19 am

Yeah, I did that awhile ago but in the course of him fixing that problem another problem arose and I ran out of money so now I have to fix it myself. Now I...
Chase Smith
plus_321
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Dec 23, 2007
12:45 pm

Hi Chase ... You might try to isolate the error also by disconnecting some boards, and measure the rest: '+++' means switch power on '---' means switch power...
Florian Anwander
florian_anwa...
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Dec 23, 2007
5:58 pm

Hello, Upon the previous suggestion, I was able to get a bit closer to the problem, but still no solution. However, I am hoping that my new information makes...
Chase Smith
plus_321
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Dec 27, 2007
3:21 am

Change your electrolytics, maybe. I had to replace mine on my filters a couple years ago. If you're having global problems, maybe it's your power supply. Maybe...
Scott Deyo
tsomneevich
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Dec 27, 2007
3:29 am

Hello, Upon the previous suggestion, I was able to get a bit closer to the problem, but still no solution. However, I am hoping that my new information makes...
Chase Smith
plus_321
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Dec 27, 2007
3:29 am
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