It have small voltage coming from separate winding in the transformer. But when I test voltage there is no voltage. I am just seeing one winding connected to two diodes. Picture attached.What a mess.
I don't have any definitive information but a 1k 2w resistor, a 1uf film capacitor and a 10uf bipolar electrolytic will probably be good enough. Since I've found no reliable 10uF bipolar electrolytic caps, I use 10uF film caps.
If it's completely isolated, you would have to measure across the windings to measure the voltage.
If it feeds a 7815 type regulator, place the black probe on the ground terminal of the regulator to measure the input and output voltages.
It is using tip41c and zener diode.
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