[sdiy] Roland Juno60 VCF Freq Calibration question

[James Meagher]

Swapped R13 between voices 4 and 6 and now they'll all calibrate properly .
. . maybe just a poor solder joint between VR2 and R13 of Voice 6 was
causing the problem . . ?

On Fri, Nov 13, 2015 at 2:46 PM, James Meagher <w.james.meagher at gmail.com>
wrote:

> I'm almost completely finished a very long Juno 60 refurb. Prior to
> putting it all back together I connected its loose pieces and went through
> the calibration procedure. All went well except for one VCF setting on
> Voice 6. When I attempt to match Voice 6's Freq setting of 248Hz (procedure
> 8.2 in Juno 60 Service Manual) the lowest I can get it by adjusting Voice
> 6's VR2 (as low as it will go), is 260Hz. All other settings for Voice 6's
> VCF are fine (Res, Width). The one possibility I've finally eliminated is
> that it's not the IR3109 chip. My only other thought at the moment, as I'm
> not a tech, is to swap R13.
>
> Any advice welcome as I haven't a the funds to bring it to a tech at the
> moment.
>
> Cheers,
> James
>
>


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