It's time to restore the 11/45 - progress!

Jon Elson elson at
Thu Feb 5 20:10:37 CST 2015

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.


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