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Philips PM3262 Oscope failure

Discussion in 'Electronic Design' started by Al, Apr 8, 2007.

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  1. Al

    Al Guest

    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.

    Al
     
  2. 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:
    ftp://ftp.eskimo.com/u/m/mzenier/seguide9706.txt

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

    Michael
     
  3. Al

    Al Guest

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

    Damir Guest

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

    Mark Zenier Guest

    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)
     
  6. Guest

    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 sci.electronics.repair group - someone in there might have been
    there?
     
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