Have the HP 8648 b/c/d unit with what looks like a fried transformer.
I've searched for the Computer Products company in Hong Kong, but
couldn't find them. The makers of the transformer. The P/S is
china made.
Here is a link to a similar spec transformer, with a the HP part number
0950-2293. The transformer has four output voltages,
+5V, +15V, -15V, +38V.
That is the first step anyway,
then it looks like I should replace the
discreet devices on the same board
along with the electrolytic and diodes.
Those are my starting thoughts anyway.
The whole unit stinks and is covered in a
thin layer of burned black soot. So I've
been busy cleaning it with 99.99% ISO.
It will take a bit longer, but I'm getting
there.
Yes, I have the manual.
Kind of a pisser I'd say.