Hello, I'm super new to this, but I'm learning.
I have a power supply from a stereo which I have not been able to make it work yet.
The model of the power supply is LF-K9350/850 SERIES MP 050607 6870R7815AB
what i did in order:
1.I changed the capacitor and another component (a6252) which had very visible physical damage. (blown up)
2. An optocoupler was shorted, but when it was removed from the board it was fine, and the short persisted. I trace it and found 2 failing diodes (ZD902 33V and ZD906 9.1V) replaced them and bye bye short.
3. Even with the above, I still do not get voltages in the cold zone, and the largest transformer shows continuity in all its outputs. I unsoldered it and that doesn't happen anymore. but I see this transformer with a bit "weird" and "blown" part.
Could it be a faulty transformer?
*I don't have an oscilloscope (And I dont know how to use one)
Thanks in advance for any advice and all your help!