Hi, I am an beginner in electronic welding and I wonder if you can have a look at this part to find the clue...
As I said in the title it is a wine cellar PCB ref : hks-yh005PCB7

I am looking for an advice if it it possible to repair. I have 3 of them... Good Luck !

 

Anything is possible!

 

So what's the problem with them?
The top picture has burned around R6 ..

 

Third board seems to have diode D2 with a disconnected leg...
First board has been overheating around R6 and the diodes, so I suspect a shorted device after the big capacitor (or capacitor is bad). Possibly the transistor next to R10 (R20 on third board?), if it has traces direct to the capacitor

 

Can someone explain to me what a 3° bug is? Never heard that term before.

 

Can someone explain to me what a 3° bug is? Never heard that term before.

Probably meant 3-degree burn which applies to human tissue, not electronics or PCB.

 

If you want to fix it, you need to be able to give it the 'third' degree!

 

third degree
noun
: brutal treatment of a prisoner by the police in order to get a confession

:asking serious and/or giving someone rough treatment to get information:
I got the third degree when I got home last night.

:severe questioning of someone to find out as much as you can:
We gave the babysitter the third degree before we hired her.

 

Ahah!

And I thought, since it is for a wine cellar, the temperature was off by 3° C or F. But that seemed unlikely on 3 different boards.