Trident F6 fuse blowing

[Boots]

Sounds like you've found the fault with the transformer and it sounds like it's a failure in the primary windings?  That's if I'm reading what your saying correctly (I don't have and so have not looked at the schematic, but am assuming F6 is the 240V inlet fuse) and if this is the case another test you could do to confirm is to measure separately the resistance of each of the two primary windings.  There should be a large difference between the two to account for this failure if the suggestion is that one of the windings has shorted?

If it's stuffed then who cares, but maybe this is interesting?

I haven't done that yet, but it was weird, when I had it connected to 110V for a moment there the voltages came up not too bad, but then started fluctuating and then dropped.
Wouldn't think you would see that with a transformer, I would have thought once its shorted that's it.
I did look sort of funny when the wax was bubbling like a chip in the fryer, just before its started smoking and I turned it off.

[Mr Pinbologist]

I've come across it a few times, shorted transformers, never in a pinball but being a electronics tech by trade i have seen a lot of transformer issues over the years in other electronic gear. Mostly i find transformers with open circuit windings or internal thermal fuses blown, usually in audio gear, hifi amps and guitar amps.

Im yet to see a bad transformer in a pin, i've been lucky so far i guess!! though i DID once have a problem with the hi voltage display winding on my Stern Stingray transformer, where the wire had corroded where it joined onto the solder lug, but luckily i was able to repair it. I carefully scraped back the enamel insulation where the wire went into the transformer and soldered on a new piece of wire to join it to the lug, its still going several years later!!