I have a power supply that is putting out 17.8 VDC when it is supposed to be putting out 13.8 VDC. When I cracked the case open I noticed the 24v 0.18a fan is broken, that's not a big deal to replace. But it was suggested to me since it is an old used power supply to go ahead and replace the 4 2N3055 pass transistors. I took one out and want to test it to see if it is any good or not. Now from what I understand if you lay the transistor on its back with the pins facing up, and the pins above the center line than the left pin should be base, the right pin should be emmiter and the case itself is the collector. With my digital multimeter (Fluke 16) set on ohms test... + lead attached to collector and - lead attached to base I get 1.2ohms and the same if I reverse leads. Now E to C C to E E to B and B to E I get O.L Nothing. I also connected E to C while the meter was hooked up to B and C still nothing.
Am I doing something wrong? Or is this Transistor Kaput
I was told this should remedy my over voltage problem and if it did not I may have to replace the KA723 IC, Which hopefully I wont have to.
Am I doing something wrong? Or is this Transistor Kaput
I was told this should remedy my over voltage problem and if it did not I may have to replace the KA723 IC, Which hopefully I wont have to.