Help Hooking up this ISO Transformer

[micksimmonds]

do you have 110v going into the ISO okay? basically tested the wires going into the ISO?

have them round the correct way? in is primary I think, and secondary is output as some are named like that I think, if you know its good, then could be just a wiring error?

 

[MKplayer1start]

do you have 110v going into the ISO okay? basically tested the wires going into the ISO?

have them round the correct way? in is primary I think, and secondary is output as some are named like that I think, if you know its good, then could be just a wiring error?

It's hooked up like this:

I know this one works as I had it in a cab recently. I put my black probe on a ground in my cab, and the red probe to touch the leads on the top of the ISO and I get nothing.

 

[modessitt]

That's not how you test iso inputs/outputs. In that pic, put one lead on the black wire at the bottom, and the other on the white wire at the bottom. That's your input voltage. Then move the two leads to the two purple wires at the top. That's your output voltage. Make sure your meter is set to AC200...

 

[MKplayer1start]

That's not how you test iso inputs/outputs. In that pic, put one lead on the black wire at the bottom, and the other on the white wire at the bottom. That's your input voltage. Then move the two leads to the two purple wires at the top. That's your output voltage. Make sure your meter is set to AC200...

LOL thanks Modessitt! I thought you always put your black probe on a ground? I will give it a try after work today

 

[modessitt]

LOL thanks Modessitt! I thought you always put your black probe on a ground?

That's if you're testing DC voltage...

 

[MKplayer1start]

That's if you're testing DC voltage...

So I put the original Sega ISO back in and tested AC voltage like you told me and of course it works. I'm such a dummy. one of the outputs is 12.4v and the other is 103-104v so I think it's safe to say the 103-104v output is for the monitor.

I haven't pulled the monitor out of the cab to look under the frame for the model number but I was sure I had the 120v model but maybe I have the 100v model and that's why the ISO steps it down to about 100v

 

[MKplayer1start]

Thanks to all you guys for your help and info. DarrenF you were right!

outputs:
1) isolated 100/110VAC for the monitor and motor drive board
2) 12.5VAC for the audio amp board

Thanks to Modessitt I was able to properly test for AC voltage and those are the same readings I came out with.