Quote:
Originally Posted by djfivos
Yes I've seen the process of removing the power supply in these machines. What I'm thinking is perphaps the caps in the primary side failed and caused the oscillator to go into a runaway condition and that caused the output voltages to rise up way too high to the point where the crowbar shorted and took out the switching transistor and other critical components. I've heard this can happen with Panasonics of this era.
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Yes, I'm pretty sure that's what happened as quite a few caps had puked their guts onto the board which had unfortunately damaged some of the traces, I checked the dioded including the zeners and they all checked as they should thankfully, like I said the only diode that seemed to of failed was the bridge rectifier.