Discussion about the Korg PolySix synthesizer

The IC most suspect to fail in this circuit is the 4051 (IC31). I'd
replce it first, before doing anything else...



Am 13.04.2018 um 13:21 schrieb daviddemontis@btinternet.com [PolySix]:

> Hi all
>
> Great group.
> I`m well into a resto of my Polysix.
> I`ve fitted a KiwiSix board and psu.
> I have replaced the paired transitor
> with a 2SC1583  45G.
> I`ve replaced the opto coupler with a VTL5C9
> and I`ve replaced the three ICs 17.18 and 19.
> When measuring IC18 pin7 to TP5 I`m still
> getting -13v.
> Any suggestion on what to change next would
> be much appreciated.
>
> Many Thanks
>
> Dave

--
http://www.florian-anwander.de