On Sat, 19 May 2012 11:29:12 +0100, "N_Cook" put
finger to keyboard and composed:

So that 220/220V zener chain is perhaps more for the possibility of someone
jumpering JP1 to 100V and plugging in to 240V and instead of 350V dc trying
to get to 700V dc

Ah, that would make sense. I was wondering why there was a 275V MOV
across A-N, since that voltage would be below the overvoltage
threshold for the zener chain.

- Franc Zabkar
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