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Power & Energy
Forum Visual Signs of Capacitor Failure - Bulging
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  • Replies 28 replies
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Related

Visual Signs of Capacitor Failure - Bulging

Jan Cumps
Jan Cumps over 1 year ago

I received a new TV box from the cable provider They suggested to drop the old one at an electronics recycle collector. That didn't happen Slight smile - I opened it up. I've put the internal hard drive for sale on a 2nd hand site. For the other components, I'm checking what (if anything) is worth keeping.

What caught the attention, is that one of the electrolytical caps is beyond end-of-life. It's definitely bulging: It's the first time that I see one where the symptom is so obvious. I had others that failed or leaked. But never such a visible sign of the internal pressure effects.

image

Can you spot the culprit?

Title inspiration: capacitor labs.

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Top Replies

  • dougw
    dougw over 1 year ago +4
    The top isn't flat anymore....
  • beacon_dave
    beacon_dave over 1 year ago +3
    Jan Cumps said: It's definitely bulging: It's the first time that I see one where the symptom is so obvious. I had others that failed or leaked. But never such a visible sign of the internal pressure effects…
  • michaelkellett
    michaelkellett over 1 year ago in reply to shabaz +3
    If you want low noise then put some little ceramic caps around the rectifier. Doing so is mentioned in AOE Edition 3 (maybe in the X pages book) and after I read that I measured a design I was working…
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  • kmikemoo
    kmikemoo over 1 year ago

    So we can have training aids at work, I have some boards that I have fished out of the recycling bin.  The characteristic failure of the output modules is one or two capacitors just like you show.  I replace them and the boards are good enough for training.  Great job taking a picture that shows the bulge.  That's not as easy as it looks. Slight smileThumbsup

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  • kmikemoo
    kmikemoo over 1 year ago

    So we can have training aids at work, I have some boards that I have fished out of the recycling bin.  The characteristic failure of the output modules is one or two capacitors just like you show.  I replace them and the boards are good enough for training.  Great job taking a picture that shows the bulge.  That's not as easy as it looks. Slight smileThumbsup

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