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Yamaha CS80

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Re: Hi from Italy!

2008-12-22 by oberheim64

Well!
I solved the problem in the M board 5 with the bad PWM/PM: a bad 
IG00153 (VCO).
Now I was the last problem to be solved:
The overall volume of output, in my opinion is low. 
This happens even heard from headphone! 
When I bought my cs80 by the previous owner, I noticed that the PRA 
had
had a track repaired.
I changed all the capacitors and you hear a sound very clean.
But I have little volume of output compared to my previous cs80 (I 
had two)

There may be one of the two (or all) PH1 & 2 Led Photo cell?
Or it may be a problem in the VCA section of chorus/tremolo (OE2 
board) ?
Happy Christmas!



--- In yamahacs80@yahoogroups.com, "oberheim64" <tommysalsero@...> 
wrote:
>
> Hi.
> 
> Finally I can continue my restoration. 
> It was a IGO151 VCA that distort the waveforms!
> Thanks erikfromhere.
> 
> Now I was the last problem on waveform Pulse,in the same Mboard 
five 
> on Channel One.
> In practice with the preset Funky 3, the envelope seems slow 
compared 
> to other items or out of Phase.
> 
> It's a fault PWM section...
> 
> In the Panel mode with the Slider PM (the third slider of the 
section 
> PWM) all up, the signal disappear!
> And moving  the "speed" slider  the signal goes out of phase with 
the 
> same effect that I noticed in the preset "funky 3"
> 
> 
> Any suggestions?
>

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