Hi Tim,
I had consider this but - Source has been identified from official distributor of the micro and ins a seal vacum pack.
Joe
Hi Tim,
I had consider this but - Source has been identified from official distributor of the micro and ins a seal vacum pack.
Joe
Hi scott,
3ohms was the max resistance measured a few were 1 ohm - both polarities.I used the term "dead short" loosely as the meter accuracy is _+ 1ohm - also allowing for lead resistance.
Joe
Hey Jim,
Thanks for your input,
Boards come back from board loader - first power up the the 3v regulator starts to shut down (~ 100mA)
V/I curve ===> good idea
I wish I had one of those good USB microscopes!
Regards Joe
So how do you know it is the processor, and not a solder or etching bridge ? Drop the supply a little, so things do not fry, and you can do a voltage profile along the traces with a millivoltmeter. That shows where the current is actually going, before you remove anything. It can help find errant 'shorts'. These boards were bare-board tested ?
Check the package markings carefully - it is the package detents that matter, not the direction of the brand markings.
-jg
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