From: curd@notformail.com   
      
   On Mon, 04 Jun 2018 12:53:04 -0400, Phil Hobbs wrote:   
      
   > Depends where in the circuit.  In a power supply or audio output,   
   > sure--there are probably PN junctions isolating the cap from the rest of   
   > the circuit when it's powered off.   
   >   
   > In a low-Z RC circuit, not so much.   
   >   
   > I have a set of Smart Tweezers that I use for debugging and   
   > troubleshooting.  I like them pretty well.   
      
   I've found some switchers with ripple on the output and it was due to   
   some obscure issue with the feedback path; fortunately it was easy to   
   establish that all the caps were fine and that saved a lot of time.   
      
      
      
      
      
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