"T i m" wrote in message
...
On Sat, 29 Jul 2017 16:32:22 -0400, "tom"
wrote:

snip

I have looked at this:

https://www.digchip.com/datasheets/p...OP223Y-pdf.php

... and see roughly how it would work but not sure if that means I
should be able to test it somehow? FWIW, I have one of the little
component testers but I don't know if it will know what that is or
even damage it?

snip

Look at fig 8 in the datasheet for how your unit works.

OK. Again, I get the rough idea but I was more into digital
electronics than SMPSU etc.

If I read your post
right, this charges LiIon batteries, right?

Sorry, no, it's a general purpose multi-cell NiCad / NiMh charger Tom.

http://www.conrad.com/medias/global/...B.EPS_1000.jpg
http://www.ansmann.de/en/service/dow...7123-energy-16

snip

The PSU board feeds a fairly complex logic / output board (4 PSU
outputs to the logic board) and in turn the 16 charger outputs.

You could probably reverse engineer the whole schematic (or half of it) to
get a better view of what is going on.

Ok.

BTW, the transformer on the right next to the capacitor is not a
transformer. It is a common mode choke for RFI filtering.

Ah, ok, thanks ... that (now) makes more sense as even with that
(choke) in and D1-4 out, I've lost the short I was seeing across the
mains input. ;-)

Cheers, T i m

Ok, good. That makes more sense for why so many outputs.

Doing any measurements on this device (scope, etc) will require an isolation
transformer to look at the primary (line) side. The outputs all appear to be
isolated.

Hope it's just the shorted diodes.

Good luck.

Regards