Philips PM3262 Oscope failure

I picked up a Philips PM3262 Oscope at my town's recycling center. it looks like it has been well used.

I plugged it in and turned it on. It worked normally for about 2 minutes and then shut down. The ckt breaker on it did not pop. The "ON" light was off. After I let it sit for a while, this repeated.

I don't have schematics and when I took the covers off I did not see anything obviously out of kilter.

Has anyone had this problem and fixed it easily? If so, could you post the fix?

Thanks in advance.


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Is this a design issue? No. Then find the right newsgroup for it.

Mark Zenier's guide to the hierarchy would be a really good place to start:

It's ridiculous that we are seeing repair questions in the other newsgroups of the hierarchy and in questions that belong elsewhere.


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Michael Black

What is this crapola I got from the above. It's almost unreadable.

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First check and replace bad electrolytic capacitors in the power supply.

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What are you using to read it with? It's your standard unix text file, using newlines. There's also a slightly updated version here in the newsgroup. Posted March 24th or 25th.

Mark Zenier Googleproofaddress(account:mzenier provider:eskimo domain:com)

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Mark Zenier

I would think it is the power supply doing a thermal shutdown. This can be many things - often the filter capacitors dry out after many years. That is where I would start. One rectifier diode could also be short and it would run for a while like that. Rust, Corrosion, drying of the white gunk under the main regulator so it has no cooling is also seen before (beware that if it is a switcher, the heat sink may well be at mains potential).

There *is* a group - someone in there might have been there?

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