isolation translformer question

[venkman]

hi there!

i'm wiring my JAMMA cab and need to use an isolation translformer for my monitor.

it's a little weird so maybe someone here can help me decide what the wires do.   

the transfrmer came from a pole position game.

3 cables go into it. brown, blue and yelow.

and there are like 7 come out, in 3 bundles.

2 bundles of 2 wires, and one of 3. one of the 2 wire bundles has the monitor power connector on it. the others have random molex..

i tested the input ones.. and if i stuck the connectors in any combination of those 3, i got a reading.

none of the input connectors link to the ground wire - i assume that's what it is, that's connected to the frame of it) .. maybe my multimeter is just rubbish.

what do you think the yellow wire is?
are the other bundles that come out just stuff that was connected to the other parts of the old cab?

it looks like this:

[Ed_McCarron]

How are you testing?  Resistance?

If you're comfortable with it, power up the transformer and use your meter on AC volts to read the outputs.  That should give you a better idea as to what they do.

[venkman]

yeh resistance..

im too scared of that sucker to go near it when it's gonna be on. 

was really hoping someone had seen one like this before. wired even ! haha

erm, yeh.. but used resistance. i tried the ->|- setting too and got a 1 / and then -1 when connected to any of the front 3 so they seem to be connected in there. i think.. erm 

[Ed_McCarron]

Don't use the diode test setting.  It typically just ups the test voltage to a point that will turn on a diode.

Using resistance will only tell you if the transformer primary or secondary are not open - they will all show low resistance at DC.

Goofy Europeans and their funny colours.

Brown for Hot

Blue for Neutral

Green/Yellow stripes for Ground

Hook the primary up to a power source.  Make sure nothing is touching, then plug it in.  Set your meter for AC volts and probe the output connectors.

The monitor side should show close to what you put in - unless its one of those weird voltage monitors.

The other outputs in bundles?

If its 2 wires, its probably going to be low voltage AC for the lights.

3 wires is probably a center tapped output (also relatively low volts AC).  You'll see X volts between the two output leads, and X/2 volts between each output and the center tap.  Probably a feed to a power supply for the logic boards.