On 30/09/2020 09:22, David wrote:
Interestingly, Paul's post
notes "There is a large resistor that does the dropping to bring the
240V down to some lower level."

I have replaced (removed) a couple of these boards over the years. They had failed, and the big resistor was quite charred in both cases!


https://youtu.be/UxU-ZQp2ag4

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