5 Feb
2015
5 Feb
'15
1:54 p.m.
Hey everyone, making some progress here -- thanks
for all the tips so far!
Most of the power regulators are fine, but both H745 regulators seem to
be toast. Only getting -1.2 volts; should be -15 and they squeal angrily
when I turn the pot. The surplus shops seem to want $200 for one, so
that's not an option for me.
How does one repair such a beast?
You are giving them the +15V DC input as well as the AC from the transformer?
If so, sounds like the crowbar is firing. One thing that will cause this is a dried-up
output capacitor (you get nasty spikes on the out thast trips the crowbar).
I am not sure what you are asking with the 'How does one repair [a DEC regulator
brick]'. The obvious answer is just like any other bit of electronics, but presumably
there is some specific problem that you have in mind.
-tony