Korg Mono/Poly

Hi guys,
I have a problem with my Mono/Poly where vcos 3 and 4 are both out of tune by about 2 semitones - ie. when vcos 1 and 2 are playing a C, vcos 3 and 4 are playing a Bb. I did hear them step back in tune but it was quite brief and then they abruptly went out of tune again. Is this a take it to the synth repair guy thing or something I can remedy with my own fairly limited electronics knowledge?

Thanks,
Dave

Hi Dave,

I've got a similar problem with my VCO4, but it is only out of tune by about 1/2 semitone.  Being so small, I can still correct it with the tuning knob.

The weird part is that it happened all-of-a-sudden, not gradually.  And, occasionally, it plays at the correct pitch for a while before stuttering down to the ~1/2 semitone out.  Weird.

Did you ever figure out your problem?

Chip

--- In korg_mono-poly@yahoogroups.com, "jeddateech" <davidpkatz@...> wrote:

>
> Hi guys,
> I have a problem with my Mono/Poly where vcos 3 and 4 are both out of tune by about 2 semitones - ie. when vcos 1 and 2 are playing a C, vcos 3 and 4 are playing a Bb. I did hear them step back in tune but it was quite brief and then they abruptly went out of tune again. Is this a take it to the synth repair guy thing or something I can remedy with my own fairly limited electronics knowledge?
> 
> Thanks,
> Dave
>

Hello

> The weird part is that it happened all-of-a-sudden, not gradually.
> And, occasionally, it plays at the correct pitch for a while before
> stuttering down to the ~1/2 semitone out.  Weird.
sounds like dirt in a trimmer or broken/cold solderjoint at a trimmer.

Florian

Could it be one fo the solder joints to the heat pin?  I had a loose point on voicetwo 'the yellow wire' which would loose contact and the heat compensation board KLM 357 would start adjusting the pitch of the voice due to the lack ofvoltage.  So it went out quite suddenly and at random.  5 seconds to fix.



________________________________
 From:chipaudette <chipaudette@yahoo.com>
To: korg_mono-poly@yahoogroups.com 
Sent: Friday, 22 February 2013, 12:37
Subject: [korg_mono-poly] Re: VCOs 3 and 4 out of tune
 

  
Hi Dave,

I've got a similar problem with my VCO4, but it is only out of tune by about 1/2 semitone.  Being so small, I can still correct it with the tuning knob.

The weird part is that it happened all-of-a-sudden, not gradually.  And, occasionally, it plays at the correct pitch for a while before stuttering down to the ~1/2 semitone out.  Weird.

Did you ever figure out your problem?

Chip

--- In korg_mono-poly@yahoogroups.com, "jeddateech" wrote:

>
> Hi guys,
> I have a problem with my Mono/Poly where vcos3 and 4 are both out of tune by about 2 semitones - ie. when vcos1 and 2 are playing a C, vcos3 and 4 are playing a Bb. I didhear them step back in tune but it was quite brief and then they abruptly went out of tune again. Is this a take it to the synth repair guy thing or something I can remedy with my own fairly limited electronics knowledge?
> 
> Thanks,
> Dave
>