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Need help repairing couple 'scopes (different faults)

Discussion in 'Repairing Electronics' started by fezder, May 17, 2014.

  1. fezder

    fezder Well-Known Member

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    hmm, copycat-tape? care to tell more? :)
     
  2. throbscottle

    throbscottle Well-Known Member

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    • Thanks Thanks x 1
  3. tvtech

    tvtech Well-Known Member Most Helpful Member

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    ^^^ Hi Sweetie (blush)

    Remember me from the other night?
     
  4. dave

    Dave New Member

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  5. fezder

    fezder Well-Known Member

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    what the?....so CHEAP??
     
  6. fezder

    fezder Well-Known Member

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    thanks throb, just bought cheap chinese, hopefully they're worth it :)
     
  7. fezder

    fezder Well-Known Member

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    ooh boy, this was at storage some time, now i took it out there, let it be for day before turning it on, and ehh, same problem came up....
     
  8. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    Fez:

    Since we think that freeze spay cured it, you could try doing it again. The over spray could have hit something else. I'd find it difficult to be the transformer, but it could be.
    So why not try creating a paper/cardboard shield around the xformer and spraying it. I think I would still try to attack it with freeze spray, but in a more controlled shielded stream.

    You could spray in the general area (watch where the overspray goes) like you did before and see if you get a fix. Then hurry up and wait until it fails. Then attack the area more controlled with makeshift cardboard/plastic shields.
     
  9. fezder

    fezder Well-Known Member

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    hmm, good point. never even suspected transformer, so far away and all...
     
  10. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    For that matter, look at the power switch and the fuses. Measure the voltages ACROSS them.

    I had a fuse fail intermittently more than once. The first time got be good. Apply power, unit dead. Check fuse. with ohmmeter - Good. Check fuse using voltage across the fuse, BAD. Annoying.
     
  11. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    Use a paper towel inner tube for a shield, so that only the part you aim at gets the freeze spray.
     
  12. fezder

    fezder Well-Known Member

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    gotcha, i'll just need to take it from storage and let it warm for day. i'll have evening shift at work this week, so spare time is pretty limited now...
     

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