[sdiy] Kurzweil power problems and bad diode?

[megaohm]

 I have a K2000 that has been non-working for a few years now. Turned on
power. Blew fuse. Replaced fuse. Blew again.
It seems others have seen this same problem. The only helpful thing I could
find was the following post:
 > Kurzweil uses linear power supplies. Chances are one or more diodes in
the
> bridge rectifier have shorted, causing AC to be fed to the DC smoothing
> capacitors, which have a low Equivalent Series Resistance and look like a
> near dead short at 60 hertz. This type of failure is likely and the
probably
> cause of blown fuses.
> Diodes fail for two reasons: power surge and inrush surge at power on. A
> surge arrestor may cure problem #1, but the best remedy for #2 is to avoid
> frequent power cycling, thus reducing your chances of diode failure.
> If it were my unit, I'd get a VOM and buzz out the diodes (after
> disconnecting power and also the transformer secondary coil from the diode
> bridge) and see which are shorted. They can probably be replaced with off
> the shelf varieties available at Radio Shack, etc.
> Failing that, it's off to factory service. And if it's a new unit under
> warranty, that's the way to go.
   Tested the diodes and three of them measure 0.530 or there abouts. One
measures 0.0001 so I'm guessing this needs replacement.
It is a 1N5401. I'm wondering if this might be the proper fix/ diagnosis?
 Any thoughts, suggestions, comments, experiences greatly appreciated.
 Thanks,
peng
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