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Old 07-03-2021, 02:38 AM   #132
Join Date: Apr 2021
City & State: Islamabad
My Country: Pakistan
Line Voltage: 220VAC 50Hz
I'm a: Knowledge Seeker
Posts: 12
Exclamation Re: Dell 2007FPB teardown

Its not Secondary, its Primary thats connected with the Transistor, Look I am confused here, because the Voltage that I read after being rectified into DC from 450V 180uf Cap is 328V dc. And then the Transformer shows above 1000V , How is it even possible ! . I dont know much but I will tell you what I understood about this Board. It takes 220V Mains AC , Rectifies it into DC, then converts it back to AC for the Transformer , steps down it to 19v and then rectifies it back again. If this is right what I said, then why convert it into DC if we want to step down it later , why not step down AC Directly and then Convert it into dc?
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