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Vintage Synth Repair

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Re: [vintagesynthrepair] PPG Wave 2.3 power supply restoration

2012-05-24 by butterfield colin

Hi there,unless physical size is an issue there should be no problems replacing with a similar spec diode,I've done this often in the past on many psu's and other circuitry and never had a problem.If you can't get the same spec it its better to over spec than under spec.Regards Colin

On 24 May 2012 13:15, eidorian_aladan_net <eidorian@...> wrote:

My PPG Wave 2.3 passed away recently (while I was playing it - most annoying :-)

The AC fuse blows unless I have the +5V power supply board disconnected form the transformer. I have removed it for testing; the large 10,000uF electrolytic cap looks just fine (no obvious bulging or leaking fluid) but the bridge rectifier PK10-EDI-8350 has one diode that appears to be short-circuited (no resistance in either direction on the multimeter) which I expect is a likely cause of the problem. As the PK10-EDI-8350 is a 30 year old part that I may not be able to source easily, does anyone see a problem replacing it with a similar specified, currently available alternative? Any particular recommendations?

Datasheet is here http://www.edidiodes.com/pdf/Bridges/PK.pdf

Thanks in advance for any advice and assistance.

Cheers,
A.


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