ISO Transformer putting out too much Voltage??

Blades

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Got a free cab.

The ISO Transformer, is putting out 115v(as it should) on one end. But it's putting out 132v on the 120v end. Does it need to be replaced?

I ask ,as most of my cabs put out a little bit higher voltage on the 120v side, since it gets knocked down a bit when a monitor is hooked to it.

However, I've never seen a ISO put out 132v. Should I replace it to be on the safe side? The monitor that was hooked to it, powers on just fine...I'm just a little nervous with the higher voltage...


Thanks!

;
 
I have a pair of transformers that do this same exact thing. Both being powered by a simple switching power supply. Even the original iso transformer does the same thing. Still no answer as to why its happening.
 
Is it a Williams game?

Either way, you may find this interesting...

http://forums.arcade-museum.com/showthread.php?t=82040


Thanks MOD!!

It's not a Williams Game, it's a Sega Raster game(not vector). And after reading your guy's post. I'm going to put another ISO in just to be safe. As this is just Input...output. It doesn't have multi-taps that I can cut and jumper, like the ones you are describing.

I have an extra laying around. I'm thinking that is what I'm going to use. I really don't want to ruin a monitor when it doesn't need to be ruined. 132v just seems a bit too high to power a monitor. IMO.

Thanks again!!


;
 
If your getting 120 in and 130 out, you could always switch the input/output connections, and then have 120 in and 110 out. That should be plenty...
 
I have a pair of transformers that do this same exact thing. Both being powered by a simple switching power supply..

How do you power a transformer from a switching power supply? That doesn't make sense...


Also, remember, a transformer's output will read high on the meter when unloaded. Put a load on it, and it will drop down.

-Ian
 
How do you power a transformer from a switching power supply? That doesn't make sense...


Also, remember, a transformer's output will read high on the meter when unloaded. Put a load on it, and it will drop down.

-Ian

He might of meant that his Switcher was powered off of the ISO, not the other way around....

Yes, you are correct. However, it still would read high when it had a load on it. I just replaced it and was done with it, just to be on the safe side.


;
 
He might of meant that his Switcher was powered off of the ISO, not the other way around....

Yes, you are correct. However, it still would read high when it had a load on it. I just replaced it and was done with it, just to be on the safe side.


;

Yeah, I was back-asswards on that. Outlet > Iso > Switcher
 
i always check them loaded too.. next time you have one thats iffy and you are afraid that you might smoke the monitor, hook a 100 watt lightbulb where the monitor would plug in the recheck the actuall "loaded" output voltage. Its usually acceptable once loaded down
 
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