From: legg@nospam.magma.ca   
      
   On Sat, 12 Aug 2023 19:36:04 +0100, Cursitor Doom    
   wrote:   
      
   >Gentlemen,   
   >   
   >Whilst trying to discover why there was no audio output from a 4W amp   
   >board, I noticed there was only 0.6V on the supply pin of the audio   
   >output IC concerned. There should have been 13.6V. This pin was fed   
   >via a 1 ohm 1/4W resistor. DC voltage measurements showed there was   
   >13.6V on one side of this resistor and 0.6V on the other! Clearly   
   >something amiss here,  I thought. So it must have gone open circuit.   
   >However, there's not the slghtest sign of any phsyical damage even   
   >under high magnification, whatsoever to it: none at all. Prior   
   >experience has always taught me such resistors burn out in an obvious   
   >way which is dead easy to spot. Not this one. I'm just wondering how   
   >unusual this is and if anyone else has encountered such an issue with   
   >a resistor. Here's a photo. The resistor in question is the one right   
   >next to the largest electrolytic. There it is, looking all innocent   
   >like butter wouldn't melt, yet it's caused me a massively   
   >disproportionate amount of head-scratching, the little shit.   
   >   
   >https://disk.yandex.com/i/dE9o0lh937qdrg   
   >   
   >When I get that out of circuit.... just you wait....   
      
   Googling F2887103 gives you all the info you'll ever want about R30.   
      
   RL   
      
   --- SoupGate-Win32 v1.05   
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