Q5 is where I got the transistor from. I'm pretty sure that it's a 2sc2785. If I remember correctly from studying power supplies, it is a current overload protection transistor; when the current on R2 gets high enough to create a 0.7 v drop across the BE junction of Q5, Q5 turns on and shuts down Q2.
I'm going to give Q2 the good old diode test now that I think about it because it might also be faulty. Its been about six or seven months since I've been in this synth and I don't remember exactly what I did to it.
On another note, I've also got a KLM-367 clone that I never got working. Obviously, I've got to get the 5 volt rail up first before I can find the problem in the KLM-367.
Thanks,
Mike
--- In PolySix@yahoogroups.com, Andrew Jury <andy@...> wrote:
>
> Hi Mike,
>
> Which position in the PSU have you retrieved this transistor from?
>
> Cheers,
> Andy
>
>
> On 18/07/2011 22:45, "Mike" <mborish_2000@...> wrote:
>
> >
> >
> >
> >
> >
> > It might be 2SC2785...
> >
> > --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> , "Mike"
> > <mborish_2000@> wrote:
> >> >
> >> > Has anybody crossed a 2SC2765 PolySix PSU transistor with a generic 2N∗
> >> American Version?
> >> >
> >> > I'm low on fuses and don't want to make a mistake or give this PSU more
> >> time than it deserves.
> >> >
> >
> >
> >
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>