Korg Poly800/EX800 Users

Hello,

My Poly-800 is sounding correctly, I get 4.995V at pin 6 of connector CN6. This Poly-800 is not modded (yet), there is only a battery holder added.

Q18 is quite hot, is that normal ?

Thanks,

mike

I would say not...

Even the voltage regulator transistor Q1 doesn't have a heat sink on it, and it looks like its collector is tied directly to the NEG rail on the DC jack..

5V on pin 6 is excellent! I cannot get my poly 800 to supply this without using the batteries...

But I would say that Q18 should NOT hot....

Its collector looks to be hooked up to some sort of transformer?

Maybe test the voltage on that?

Cheers,

Nate

What voltage does your power supply deliver? Could it be like with 7805 regulators, when the bigger the difference between input voltage and output voltage, the hotter becomes the regulator.

--- In korgpolyex@yahoogroups.com, "vcagate" <vcagate@...> wrote:
>
> Hello,
>
> My Poly-800 is sounding correctly, I get 4.995V at pin 6 of connector CN6. This Poly-800 is not modded (yet), there is only a battery holder added.
>
> Q18 is quite hot, is that normal ?
>
> Thanks,
>
> mike
>