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How to test an AC/AC doorbell transformer?

Postby brian_mk » Sat Aug 21, 2021 11:18 am

You have two choices: Either open up the cases and try to diagnose and fix the problem yourself or return both supplies for a refund or replacement.

It could be something simple like a connector or soldered joint.
Opening up the cases may be difficult or impossible if they are glued.
It would also probably invalidate any guarantee.

I think I would return both supplies. Both Amazon and CPC are pretty good when it comes to returning items.
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Postby Mr White » Sat Aug 21, 2021 3:38 pm

itm60 wrote: I have always been extremely careful about selecting the correct function on the multimeter


itm60 wrote: I'm connecting the output cables of the transformers directly to a multimeter, and setting the multimeter to AC/15V


But it is a 24v transformer?

itm60 wrote: In the past if I have set my multimeter to a lower range than the transformer is delivering the reading simply goes off the scale in the multimeter - it hasn't done any damage to the transformer. I have done this many times


Just because you always do something (wrong) does not mean it is correct.

There is nothing you can do other than replace them.
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