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Subject: RE: [chromapolaris] schematics

From: "Paul D. DeRocco" <pderocco@...>
Date: 2019-03-21

> From: karmakater@...
>
> my polaris have to be fixed (no audio) and the technican wants
> a complete schematic, he knows the schematics in the service manual
> but he wants the complete plan. i'm not that specialist. is
> there a whole polaris schematic or is it even needed, concerning
> the available schematics?

The schematics in the service manual should be all you need. The only significant thing that I know is missing is that there was a change in the design in the area of the channel outputs to reduce crosstalk noise. This involved using rearranging the sections of ZX07. There was also some hand wiring in that area in the earlier version, lifting a pin on that chip and running a wire to bypass a trace on the PC board. I'm not aware of any published material available on that, but even if you have a problem in that specific area, it's pretty easy for a tech to figure out.

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...