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You know you could just wire the jack, or a new jack to the battery terminals.
--- In korgpolyex@yahoogroups.com, "n8" <natere2ster@...> wrote:
>
> hi list.
>
> just joined and have a question perhaps someone can chime in on...
>
> i have a korg poly 800 mkI here on the bench with a power issue.
>
> when on batteries it runs fine, but will not run off the wall wart...
>
> the wall wart works ok, i tested the voltage on the dc plug and it is spitting out 13V const. I read that at the DC jack as well...
>
> The problem so far looks like i do not get the +5V on the connector CN06A on pin 10....is that correct?
>
> I get the pull DC in on pin 11 so that is good!
>
> But i need to get that 5V on pin 10 so it can be sent to the chorus board, then to the volume / switch on?
>
> from the rough schematics i see that Q1's base and collector are tied to this rail, and its emitter is tied to the DJ jack....
>
> Q3 is E-C is on the 5V line, and its base is tied to Q2 tranny which is tied to Q15 which is tied to gnd.
>
> Is this correct?
>
> I assume its one of the power switching transistors are bad, how can I confirm this? I de-soldered Q1 and have it on the breadboard.
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> I used the standard transistor PNP tester circuit, as seen here:
>
> http://www.kpsec.freeuk.com/trancirc.htm
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> It seems to work fine, I can turn the led on when the switch is closed and turn it off when its open...
>
> So i guess its ok and i should put back LOL?
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> Anyone know of any other transistors to check?
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> I am looking at Q3 for some reason....
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> What steps down to voltage from the DC jack in out to the +5V?
>
> I assume once i get the +5V i will be ok...
>
> i just keep looking at Q1 and Q3 cause they are both tied into GND, the DC jack in, and the +5V rail.....
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> Sorry for all the questions i am noob!
>
> Cheers,
>
> Nate
>