Removing a board

[Iceonfire1878]

I have a Husqvarna Optima 630 sewing machine that I was told by a repair shop that the transformer blew. (They also wanted to sell me a new sewing machine). I found someone to repair the board, and I have opened up the cover to it, but how in the world do I get the board out? I know nothing about electronics. It pulls away slightly, but looks like there are wires going up into the base of the machine. Can anyone provide help that has some experience with this issue?

 

[Nigel Goodwin]

It's quite possible that the wires are soldered or crimped in place, so it probably won't unplug.

Why not just take the entire machine to the repair guy?, particularly as it's quite possible that the motor has blown the board.

 

[Tony Stewart]

Do the electrolytic caps show signs of leakage or bulging +ve end?
Is the fuse blown? OR any other burnt parts?

 

[Nigel Goodwin]

Nice picture!

 

[Iceonfire1878]

I finally go the board undone enough that I can see the underside. I don't really see anything unusual on that side, but on the underside you can see where the soldering looks funky. It blew (smoke, etc) when I was trying to change the lightbulb. Is there or isn't there a transformer on this board?

 

[sagor1]

There is a transformer, right next to the fuse in the lower left of the picture of the top of the board.
Did you check the fuse?
Next to the white capacitor and 4 diodes, there seem to be 3 resistors that may have overheated. Those need to be checked as well.
How come the fist picture at the start does not have the capacitor, and the one you just posted does?

 

[ChrisP58]

The first picture was posted by another member, and is likely a different model and/or version of the machine.

 

[Nigel Goodwin]

I finally go the board undone enough that I can see the underside. I don't really see anything unusual on that side, but on the underside you can see where the soldering looks funky. It blew (smoke, etc) when I was trying to change the lightbulb. Is there or isn't there a transformer on this board?

Those are VERY obvious dry joints, and could easily be your problem - resolder them and see what happens then. Bear in mind, it might be a little more difficult than usual to solder them, due to the arcing and burning that has taken place - clean them as well as you can first.

 

[sekemiat ke]

nice picture. just pick everything at let the person who said can do the repair remove it by themselve. all the best.

 

[Iceonfire1878]

Thank you everyone. I am now going to take it, machine and all to the person who said they could fix it ... an electronics specialist. As I mentioned in my original post, I know nothing about electronics. I don't know what a capacitor or diode or resistor are. Will be leaving it up to the specialist at this point and will pass on all of your suggestions.