If so, it does sound like the MCU is gone. The best way to check that
It is unusual for the MCU to just go "Poof". Some more methodical
helpful. Do you have the proper voltage at the power input pins of each
> K2 S/N 757 F/W 2.03d
>
> I was having some trouble with low power output through the K2 auto tuner..
> getting only about 1 watt or so into a dummy load.
>
> I had the cover off looking for any troubles. I disconnected the auto tuner
> and connected the dummy load to the ant out on the k2 and had full power out
> from there.
>
> While sliding the radio so that I could see inside a little better, the rig
> triggered tx and made a few dahs, go t real loud, then I heard what sounded
> like something short in the audio and smelled an odd odor.. this all
> happened within a second or two and it was too late.
>
> The entire radio shut down and I have no display, no relays click when I
> power on, no s meter etc.
>
> Checking inside, I do have power all through the power supply.. 8v and 5v to
> the MCU.. there, however, is where things go awry.
>
> No Tx or Rx. No power on pin 3, 6, 13, 19, and all other pins that should
> show 5v are either dead or showing only .1v or .2v
>
> I'm thinking the MCU? but I really can't figure out what caused it since
> nothing was touching bare wire when the catastrophe occured.
>
> Other symptoms include no voltage on U7 pins 1 and 2; U8 no voltage on pin
> 1, 9, or 11.
>
> I sure hope I can fix this. This is my favorite rig.
>
> Brian W3ATT
>
>
>
>
>
> --
> View this message in context:
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