From: liz@poppyrecords.invalid.invalid   
      
   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....   
      
   Micro crack in the solder?   
      
      
   --   
   ~ Liz Tuddenham ~   
   (Remove the ".invalid"s and add ".co.uk" to reply)   
   www.poppyrecords.co.uk   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)