5 Feb
2015
5 Feb
'15
6:10 p.m.
On 02/05/2015 03:47 PM, Jacob Ritorto wrote:
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.
If they belch smoke, then they are toast. Possibly the
overvoltage crowbar is tripping,
or there is a short somewhere else. Did you test these
outside the machine or with
the CPU hooked up? I think the -15 reg needs +15 to operate
correctly, as somebody
mentioned earlier.
Jon