[sdiy] How to find a short-circuit? (Vox organ problem)

[Mike]

> BTW, in the power supply, there's a big transistor, which is most likely
> OC35, or possibly OC36 (messy schemas). My friend wondered what is its
> purpose. He suggested, that it it has something to do with the fact that
> when the supply is turned on, the positive voltage rises slowly to the
> correct voltage (when disconnected from organ, I assume), it takes like 15
> seconds. He suggested that this removes any possible "pops"-sounds to be
> heard from an external amp when the organ is turned on or off or something
> like that. What do you gurus think? Here's a link to Connie 2 schemas if
> anybody wants to check it out:
>
Thre are two supplies: the lower one seems (if I read it correctly) a 9V
stabilised. The cap across the Zener will do the slow run-up, but 15 seconds
is way too long. Ceck the resistor in series with the Zener, and check the
Zener voltage. Output should be about ).15 volts greater than the Zener
voltage I think. The upper supply is not regulated, that is the one I think
that will drop on load.

The supply seems to unplug, si a dummy load test should be possible.

Mike