[Elecraft] KX1: power on, no LED readout, then a burning smell

John Shadle shadle at katzenfisch.com
Mon Jul 16 22:07:22 EDT 2007


Oh no. I have no idea what I have done. I haven't used the KX1 for a 
while (a couple weeks) and hooked it up to a 7Ah battery and switched on 
the power. The battery was measuring 12.8v before I hooked up the radio.

As soon as I switched on the radio, I heard a little something in the 
headphones (like a "pop", but not uncharacteristic of the KX1 turning 
on), but no display on the LED.

I did smell something burning, though.

I powered off and took the case off (and smelled more burning odors). 
When I took the board out of the enclosure and gave it the once over, I 
found that the copper traces were exposed in the area between R16 and 
R17 markings on the side with the crystals installed (see photo below).

http://www.flickr.com/photos/shadle/832402407/

I don't want to apply power again, but am not sure where to head next.

If anyone has any ideas, I would love to hear them. The traces that are 
now exposed run from pin 10 of RP5 to U8 (not sure).

One thing I did notice, dealing with power, was that the internal 
battery connectors were not connected to the board...but would that 
matter if I wasn't even using internal batteries at the time?

Oh boy. I hope this is easy to fix or troubleshoot.

Thanks for your help, all.

-john W4PAH




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