Samsung Washer Board repair

[azncapcom]

I have a problem with my samsung washer main control board. The washer would cycle on/off constantly every minute or two after turning it on or running a cycle.

I know it's the board, as I replaced the entire board and it fixed the issue. I am now trying to repair the old board.

Does anyone have the schematic for this board? couldn't find it anywhere.
Model: DC92-01621A

I started checking the relays, and they were all good, except I accidentally applied voltage on the wrong polarity on one and blew the diode. How do I find what spec diode I need to support this relay?
Relay: HF32F/012-HS3

https://www.futureelectronics.com/p/electromechanical--relays--power-relays/hf32f-012-hs3-257-hongfa-9059799

I will be checking the capacitors next. Do anyone have experience repairing samsung boards and what is the typical failure? I see lots of issues with samsung boards online, but everyone just replaces the entire board, could not find any information on actual board repair. Possibly because it is a PITA as they coat the whole PCB with some kind of water proof membrane and it's a pain to remove to work on the components.

 

[kellys_eye]

but everyone just replaces the entire board,

could not find any information on actual board repair.

You answered your own question.... short answer is IPR (intellectual property rights) which the manufacturers always cite in order to prevent anyone 'copying' (or, as it happens, repairing) their stuff. Money....

As for the diode - something like a 1N4004 will do.

 

[bidrohini]

There are many videos about repairing samsung washing machine. But sounds like you did not find any solution in those. If so, I think it's better to contact samsung after sales service. Perso ally I prefer taking malfunctioning appliances to the company in the first place. Because warranty may become void if I open them and do not succeed in repairing.