> Can't you just simply monitor the machine to see what actually turns
> off when it fails and work from there

Hi Luis. It's inconvenient for me presently but I may have to do that.
I can imagine that will involve some time and note-taking. The problem
could be anywhere from a small component to something in the power
stage. I'll have to work out for the owner what the repair/investigative
scenarios will cost. It's a pity it happens to be this particular very busy
week of the year

> You have the advantage at the moment that the machine works for
> a period of time before it fails

Yes, that is a something to be grateful for

> We have a few old catalogues here, I will have a look to see what
> I can find about your transistor

Thanks. It may not be one of them that's faulty but it would be nice
to know what they are just in case

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