SOURCE: I have a Black and Decker 7.2 V cordless drill
Center pin is generally positive - outer ring is negative. But you can use a 9v charger just as easily; in fact, the one supplied with the cordless drill is a 9.0v, 200mA output charger.
SOURCE: Black and Decker Cordless Drill Chuck stuck in full open position
I'd put penetrating oil in it and tap the chuck with a plastic hammer. That should free it up.
Best rgrds, W/D
SOURCE: fixing a cordless drill battery charger
usually transistors have three legs, diodes have two arms all very confusing isn't it? resistors have two arms as well but not three legs or only two legs and no arms its all about arms and legs isn't it do not attempt this repair if you live at home
SOURCE: Circuit diagram for charger for Black & Decker
You can contact a Dewalt Service Center to see if they have the diagram. Black and Decker is Dewalts lower priced line. A quick search on their website did not reveal anything. They may not have the diagram. As far as I know there are no parts available for the chargers so you may have a hard time locating the diagram. Try giving Dewalt a call.
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