Completely destroyed this fan driver

Airwalker16

Airwalker16

Well-Known Member
I appreciate all the rapid feedback fellas. I'll get a pic for ya. Ya I don't know how I messed that up. I'm aware of what drivers do. Just completely fucked up this one. I only opened it to see if I could unsolder the extra wires from the board on the output so I didn't have live wires just hanging unused. @Renfro
 
dandyrandy

dandyrandy

Well-Known Member
Find the caps on top of the board rated at 160 or better and trace it back. Their will be a slot that bridges the legs on the optoisolator. Usually 4 legs. The secondary low voltage side controls the power mosfet thru the optocoupler. This isolates the low and high voltage.
 
dandyrandy

dandyrandy

Well-Known Member
My best house call was for a rear projection Sony. Warranty call. Spots on the screen. The customers had the place sprayed for roaches and I think most ended up in between the lenses and the guns.
Another one I went to I got there and two trailers were butted together with a roof over them. Post roof not attached. Doublwide! Anyway I go into this dark place with my tools and this young lady led me to the TV. Setting on the coffee table was a revolver and a pile of money. I fixed it and they tossed me cash with a tip. Two weeks later I read in the paper they were arrested for meth.... I got stories.
 
dandyrandy

dandyrandy

Well-Known Member
The two surface mount bridges on the bottom can you trace which on goes to the 600v cap? They appear to be separate.is there two high voltage rated caps?
 
dandyrandy

dandyrandy

Well-Known Member
It appears db?1 and two are the rectifiers for the line. Maybe the two are connected already. Maybe check resistance from the two possible inputs? Not sure why the would have two.
 
dandyrandy

dandyrandy

Well-Known Member
It looks like two output pins on the surface mount bridges are connected. Maybe two to increase current?
 
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