Fishoz's PL 400 Conversion

That means we still have a problem in the chassis. I THINK it has to do with the DC protect board. It is supplied B+ voltage off the backplanes, and there are a couple diodes that look toasty. I'll hook things back up and isolate the DC protect and go from there....
 
Pulled the BR and the caps. Hooked them up temporarily on the bench. Then hooked the transformer to the BR. I have DC voltage...
Make sure you check for no shorts of each winding to the transformer case/laminations.
 
Good to hear, it is all repairable then.


Yes, still leaning towards the DC protect board as my problem. I've probed around the backplanes A LOT and can't find a short there anymore...
 
It is not the DC protect. Isolated the DC protect and still have a high current draw on the B+ rail...
 
Got the tool Joe!!


Still troubleshooting Fish!!
 

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3 minus side outputs were shorted emitter to collector........
 
That cured my high current draw, now the bulb does go dim...
 
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