[hpsdr] Troubleshooting a Hermes 5v Power issue

[Kjell Karlsen]

Hi Dave.

Have you tried with an external 5V PSU?. But first I think you must  
measure if there is a short on the 5V bus after F3. If Hermes works with  
an external PSU, there is something with the SMPSU. And I know it can be  
difficult to measure on the circuit!

73, Kjell





I finally got my Hermes built and had no 5v. I re-soldered u24 aka u58 and  
I now have 5v at pi3 of J26 but as soon as I connect the jumper (pins 2-3)  
the voltage drops to about .4v. I thought it might be a solder bridge  
somewhere but fuse f3 is not tripping so I'm thinking it might still be a  
power supply issue. Does anyone have any ideas?

Thanks,

Dave
KA2OQZ





På Thu, 03 Apr 2014 18:40:37 +0200, skrev Dave . <kdcarlso at gmail.com>:

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