The message
from Tony Polson contains these words:

Definitive advice will be very much appreciated!

Definitely take the projector apart and see where the wires go.

Unless things are very different from my expectation, the live will go
to the switch, the neutral to the other side of the
bulb/fan/transformer/whatever, and the earth to the chassis.

A clear photo of the gizzards macht alles klaar, yah?

--
Skipweasel
Pay no attention to that man behind the curtain.