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pup30-25

pup30-25

(OP)
the name on it is international power source doing web search and ebay searches pup series has the names Power Box,Tumber technologies, trump power...its a switch mode supply output 5v 3a and 24v 1 amp..everything on the board lookgood caps no swelling,leaking,nothing burnt..driver transistor has 160vdc on it.Primary side only has two caps filter and possible drive.. i tried replacing the drive witch eas a 47uf 50v no change..dont find anything shorted on the secondary side.no noise when power up.Anyone know were i might get more info on this guy?
Thanks

RE: pup30-25

(OP)
I hook up an external power supply to B+ primary supply ( 20v only supply on hand)and a variable supply to 10k resistor that feeds the little vertical board . Brought the supply to the up to 16v and unit started working. remove the 16v supply and unit still ran. 5v and 24v on the outputs.tested again on 120vac nothing...
the little verticle board has three pins seperate from the other 5 pins. These three pins are close to the secondary side which is the monitor for shutdown. Scoped all three pins for spikes and DC on turnon..nothing...removed small verticale board..removed conductive dried glue..reinstalled ..everything works...conductive aged glue strikes again

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