I assume you've got your test prods directly on the pads so you know it's not just a dry joint?
X-posted to s.e.r (more appropriate group)
I assume you've got your test prods directly on the pads so you know it's not just a dry joint?
X-posted to s.e.r (more appropriate group)
Yes. But making that mistake isn't beyond me, by any means. It's a very well-assembled board (I didn't do it), but well designed, too (I did it
-- and I'm modest, just ask me).
-- Tim Wescott Wescott Design Services http://www.wescottdesign.com I'm looking for work -- see my website!
Plenty of water and the whiskey bottle has been properly drained.
The dissipation power is 200mW max.
So I lower than 0.3A.
If not, it burns !
Hello, and the only similar problem I've encountered is with those sandy-colored dropping resistors (rectangular parallelepiped shaped) that have been used in radios and TVs. They can swell and/or crack over a period of time. Repeated heating and cooling no doubt stresses the resistor material. Sincerely,
-- J. B. Wood e-mail: arl_123234@hotmail.com
Some of those are 'Fuse Resistors', and are designed to fail open if the equipment starts drawing too much current, or if it is running too hot. I replaced hundreds, if not thousands of those in consumer electronics. Some OEMs switched to the Belfuse 'Chemical Fuses', which had a chemically coated element that would flash and vaporize the element at a set temperature.
They were quite common, in spite of Phil Allison's claim to the contrary.
-- Never piss off an Engineer! They don't get mad. They don't get even. They go for over unity! ;-)
Not much safety margin for an 0603.
-- Thanks, - Win
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.