Vintage Synth Repair

On Thursday 30 August 2007 02:39, David Vandenberg wrote:
> The first thing you should do is disconnect the power supply from the
> rest of the circuits, and see if it still blows the fuse, if it
> doesn't blow the fuse, then you have a short somewhere else.
> If it is the power supply, then try these tests.
> Disconnect the transformer from the power supply, and check it for
> shorts, if it is ok, then check the diodes for shorts.

So far so good...

> If everything checks out, then I would replace all the electrolytic
> capacitors, 

I get really tired of seeing this -- it's not that often that necessary.

> I would also replace the positive and negative voltage 
> regulators (their cheap)

Ditto.  Those are not common failure items.

> If your not sure about a part's condition, just replace it.

And this is the worst part of the whole mess.  If you don't need to mess with 
something then don't!  Going in and changing all sorts of parts unnecessarily 
is likely to create more problems than were there to start with,  and "the 
shotgun approach" is certainly not the way to recommend to troubleshoot...

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
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Information is more dangerous than cannon to a society ruled by lies. --James 
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