I’m trying to fix a Dremel that has a broken power adapter jack. I think the best way to repair it would be to solder the power adapter wires directly on the PCB of the Dremel.
There are still 2 wires soldered on the PCB, so I would solder the power adapter wires together with the PCB’s wires (see pictures).
The only part I don’t know is: which wires should I solder together? There is one red and one black on the power adapter, but both are red on the PCB.
Here is the PCB:
I would remove the black input block and just leave both red wires.
And here is the wire from the power adapter:
Better view:
Best Answer
Looking at the first picture, I think that is a Barrel Jack. The polarity of it is the outer contact is the -ve polarity and the inner contact is the +ve polarity. It seems in your picture that the wire on the right is the -ve and the one on the left is the +ve.
But you need to check it well beforehand.
When it is confirmed, you can directly solder the Red wire from the adapter to the +ve connection and the Black wire to the -ve.