[sdiy] Roland Juno60 VCF Freq Calibration question

[James Meagher]

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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