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Help with soldering power connector to PCB?
51mmz0rz:
Most of the time, the center pin of the connector and power source is the positive voltage. You can test this by sticking the positive multimeter probe into the connector on the power source, and placing the ground one on the outer metal. If the voltage reads positive, then the center connector is +, outer shield is -. If the voltage reads negative, these are actually swapped.
Nick is right that usually two of the three pins will be attached to ground. Looking at your board layout, I think the back most pin is connected to a power plane on the top layer of that board. Also you can see two of the three pins are not connected to that plane. I bet if you turn that board over, or even use a multimeter, you will see those two pads closest to the edge are connected (and therefore likely ground).
Also, if you can see a clearly marked "GND" connection on the board, use this to test connectivity with the multimeter. Ditto for a power connection.
If you didn't feel like reading: I think the back most pin connects to the center conductor and carries power, while the other two pins are ground, but I urge you to test it yourself.
Encryptor:
A lot of the time you can also look at the back of the power supply and there is usually a diagram which show's you which is + and which is -.
Encryptor
DeLuSioNal29:
Well, I got lucky on the connector I ordered. It fit perfectly. :applaud:
And now the machine works.
Thanks everyone for your help.
D