i would bail on voltage measuring in regards to tuning. just follow the procedure for tuning in regards to trim pots and scaling(says the idiot who just tried to help a fellow 80 owner with their tuning and forgot that you MUST do 2' first. was that my 4th or 5th time forgetting this crucial step?).
--- On Mon, 8/11/08, willgregori <will.gregory@...> wrote:
From: willgregori <will.gregory@...>
Subject: [yamahacs80] Re: Expert question- Tuning procedure - stuck at step 2
To: yamahacs80@yahoogroups.com
Date: Monday, August 11, 2008, 4:54 PM
VR1 has something to do with the global tuning i guess, i just wonder
why it does not affect the Volatge on pin13 IC2- as it is described
in the tuning manual.
Since i am an absolute beginner in tuning a cs-80 i just follow the
instructions, i have no clue what is important and what can be
skipped.
Actually my particular CS-80 is from switzerland, it belonged to a
collector who had an enormous collection of vintage synths (bought
also 3 racks of system 100m there)in a dusty warehouse. Shame on me,
this was in 2001 already and I did not find the time to take much
care of this CS-80 yet...I have just too much other synths which
needed service and the cs-80 seems to be a true masterpiece in terms
of maintenance. ..
--- In yamahacs80@yahoogro ups.com, rj krohn <r_j_d_2.phila@ ...> wrote:
>
> ive never tuned one via DVM. why dont you tune it via the audio
output? does VR1 affect output pitch? sure you've got the right
voice? sorry if im oversimplifying something about your situation... .
>
> oh, and as cs-80 nerds, im sure we all would be intrigued by the
instruments back-(and fore-) story.
>
>
> --- On Sat, 8/9/08, willgregori <will.gregory@ ...> wrote:
> From: willgregori <will.gregory@ ...>
> Subject: [yamahacs80] Expert question- Tuning procedure - stuck at
step 2
> To: yamahacs80@yahoogro ups.com
> Date: Saturday, August 9, 2008, 12:49 PM
>
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> Dear CS-80 friends,
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> i am currently restoring a CS-80 which collected dust for some 10+
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> years in a warehouse. Fortunately everything seems to work so far,
but
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> of course the tuning is a bit off.
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> When starting the tuning procedure i cannot go beyond step 2.
According
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> to the manual Value at pin 13 of IC2 KAS board should be set to
125mV.
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> Mine stays always at 135mV- no matter how i turn the corresponding
VR1
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> pot. VR1 pot itself is ok though.
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> Anybody has a hint?
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> Thanks, Gregor
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