Tsunami decoder

Model Railroader Electronics and DCC
1

Hi,

I recently installed a TSU-750 decoder…and can not get the SMD LED`s to work.

Question is …is the blue wire the postive + , or the negative - ?

2

Blue wire is positive. Be sure to use resistors with them.

Mark.

3

Thanks,

Now I know why they will not light up…and I do have a 1k ohm resistor for both the front and rear.

4

The paper work with the decoder spells it out.

Rich

5

And it really doesn’t matter which wire you attach the resistor to. However, for consistancy, I usually solder it to the blue (+) or common wire.

Tom