I have a PC 8501 battery charger that is having some problems and was
wondering if someone technically capable (i.e., I don't want anyone to get
hurt) has an operating one that they can open up and check two components
for me. Mine has a voltage regulator that is blasted apart in the middle
(where the component identifier is) and a high(er) power resistor that is
burned and scorched beyond recognition. If anyone can identify these two
components, I'd appreciate it (and I can repair my charger). The voltage
regulator is a three terminal device that looks like a TO-220 package and
the resistor looks like it is (was?) about 2-3 Watts but cannot read the
color bands. I'd rather know what was really in there rather than taking a
Hmm, you don't know what your doing, but want to fix it?
What was the cause? Battery shorted out?
First off if your looking at reverse engineer a battery charger, it's a 12v
charger... Go to Radio Shack, or download a 12v regulator data sheet and
rebuild it off of that. The Data sheets will give you all the specs you need
to build around it and the Battery's spec too. I doubt Porter Cable will
give up the chip. Is the
Transformer Ok? Caps Ok?
unless you know what smoked it and corrected that first the rest is futile.
Either build a new one from scratch or buy a new/used one.
First learn from your mistakes, you have a smoked charger, because of poor
design. should have smoked a fuse. Why rebuild a smoker. and if your an EE,
the time to design a new one was wasted on the email.......
I don't know why I was unable to retrieve your message prior to today...but
THANK YOU VERY MUCH. You've answered all my questions on the charger. Much
of my charger's components are unreadable!
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