Electronics > Repair
Sym proceed - zero cross switch repair (help needed)
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fzabkar:
What is the voltage across the 33uF capacitor?
rena:
I find 46.5V DC
fzabkar:

--- Quote from: rena on August 01, 2024, 03:37:07 am ---I find 46.5V DC
--- End quote ---

You should be measuring 160V - 170V DC. Perhaps the 33uF capacitor has dried out? That's assuming that the AC input is indeed 120VAC. In fact, 160V is a marginal rating for that capacitor.

It could also be that D1 has become leaky, although that would make the capacitor look like a short.
rena:
That was it !
Thank you, it is working now.
I feel so silly because I was pretty sure I checked the cap, but it seems I didn't...
I learned a lot and I will read a few things about "high-wattage potential divider".

Thank you all again!
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