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Danny D'Amico Danny D'Amico is offline
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Default Alarm system transformer + power supply (would both go bad atonce?)

On Sat, 23 Nov 2013 17:10:37 -0600, The Daring Dufas wrote:

Looking at your picture, right above where the transformer leads connect
to the terminal strip, there is an electrolytic capacitor right above a
small bridge rectifier. I can't quite tell but the capacitor could be
swollen and shorted. The 3 terminal voltage regulator is above that
capacitor attached to the aluminum plate heat sink. Those are the main
components of the AC to DC power supply and if one of them is shorted,
that could kill the power transformer. ^_^


I'm surprised you knew *where* the transformer leads entered the board,
because I didn't say, so, but I see what you're talking about.

Also, I'm surprised you knew that was a bridge rectifier, because, well,
because I didn't - but - looking at it from the side, I can see four
uninsulated legs, which indicate it has four leads, one of which is
marked "+".

Here is the same picture, but, with a few things marked that I know of
(including the electrolytic capacitor I think you're talking about):
http://farm6.staticflickr.com/5486/1...62578375_o.png

I looked and touched and that cap seems OK visually; but, of course,
it's probably 20 years old...

For the first time, I'm wondering if it's not just a new transformer,
but, that I probably need to replace the entire board...