Dan, yes, your SMPS boards are both bad.? It must have been a bad short you made with that probe.
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If you want to try to repair them yourself:
- On the 3.3V SMPS, it is most likely D109 that is shorted.? You can remove it, and see if the offline tests work.? If the tests work, all you need to do is replace D109.
- On the 5V SMPS, it is more difficult to say.? Something is turning on Q108 when it is supposed to be off - or maybe it is shorted.? You can look at the PWM_5V signal (during offline test step 2 or 3) and see if it is low (near 0V) like it is supposed to be.? If it is high, that is what is causing the problem and you need to find the reason (a short in the soldering or missing R108 or whatever).? You can also look carefully at Q108 and L101, and see if either looks burnt.
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Or if you want, just order a new pair from qrp-labs for $10.
In either case, when you have functional SMPS cards, install them, and power on only with a current-limited (~250mA) supply at about 7V, in case something else undetected has failed on your board.? Hopefully the processor comes up and you can use the diagnostic page of the terminal interface to verify that things are working OK before giving it full voltage/current and trying transmit diagnostics like LPF and SWR scans.
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Good luck
Stan KC7XE
