Hi klynstronic,

Thank you for your help.
I didn't notice any bad component or sulfated/overheated traces. Therefore to my eyes there is nothing looking wrong.
I already tried to reflow some solder joint but not all (i vould say maybe 20% off all solder joint).
I did it where I think there was big load of current and heat. To be more precise around big relays and capacitors and the chip behind the huge heat sink.
But there was no improvment.

Can someone explain the main principle of power supply main boards ?
I understand there is 230v ac...

Hi everyone,

I am trying to fix a samsung washinmachine power supply main board.
I already replaced it with another one to fix the machine but i want to try understand the issue with the old board.
Therefore i hope to be able to get some help to explain what to check in order to troubleshoot.
The power supply board reference is the following: DC41-00189a
I have followed one thread ([URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-power-supplies-and-power-supply-design/61916-powersupply-washingmachine-relay-problem?t=67604[/URL])...

Hi everyone,

I have come by this forum while trying to get info on circuit board for a samsung washing machine.
I have been following one thread and was surprised as how friendly and cool the help provided here was.
I want to be part and try learn/improve my skills.

Hope you all the best with your electronic issues ...