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   sci.electronics.repair      Fixing electronic equipment      124,925 messages   

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   Message 124,845 of 124,925   
   Cursitor Doom to legg   
   Re: Blown Resistor?   
   06 Dec 25 14:29:43   
   
   From: cd6699@notformail.com   
      
   On Mon, 01 Dec 2025 08:01:18 -0500, legg  wrote:   
      
   >On Sun, 30 Nov 2025 18:07:46 +0000, Cursitor Doom   
   > wrote:   
   >   
   >>On Sun, 30 Nov 2025 12:41:35 -0500, legg  wrote:   
   >>   
   >>>On Sun, 30 Nov 2025 14:38:33 +0000, Cursitor Doom   
   >>> wrote:   
   >>>   
   >>>>Here are the photos of the suspicous resistor; let me know what you   
   >>>>think. In addition to the blow holes, it's also slightly mis-shapen.   
   >>>>   
   >>>>https://disk.yandex.com/d/ommuYJD2ZKsW8A   
   >>>   
   >>>Doesn't look like a paint defect, nnless you've been poking   
   >>>at it with an exacto knife tip, after the fact.   
   >>   
   >>I've not been excavating! There was a bubble on the surface   
   >>originally, which I scraped off with a fingernail to reveal that hole.   
   >>I didn't dig any further.   
   >>   
   >>>Can't tell if it's smoke or just bad shadowing. Why not same   
   >>>exposure and lighting in all three images?   
   >>   
   >>It was very difficult to photograph, because the depth of field was   
   >>close to zero and the resistor was only millimeters from the lens   
   >>glass. I had to use a hand-held LED lamp for illumination, but   
   >>full-on, frontal illumination wasn't possible due to the proximity of   
   >>the subject to the lens, I'm afraid. The lighting varies because I was   
   >>holding the lamp by hand each time.   
   >   
   >A 'bubble' is a definite sign of a paint defect at time of mfr..   
   >   
      
   I've never come across that before; just assumed it had blown through   
   over-current. I was *convinced* I was really on to something. I   
   suppose I could excavate the hole out and see how far down it goes   
   down. I might do that tomorrow just out of idle curiosity....   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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