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Messages - kscience

#1
Schematics and Layouts / Re: Baldwin Professional
February 13, 2009, 01:57:30 PM
JohnK-

The bigger filter can is a weird one, as I now know [I have 2 of these amps to fix]- it is common POSITIVE, unlike 99% of can caps.  You installed the caps backwards here, and they leaked internally, burning the resistor.

Try it again with the caps positive grounded.  It has a PNP power amp after all, which requires a negative supply voltage........