Omega Enlarger problem

[ic-racer]

Looking at the schematic, you can see that there is a voltage-buck/boost winding on the power transformer with a series capacitor .

Good thought, but that ferroresonant transformer is only in the Chromegatrol. The 'standard' supply has a 'standard' transformer (OP indicated that the 'standard' supply also tripped the GFI).

 

[paul ron]

Here is a source for the schematic and other manuals...

http://www.jollinger.com/photo/cam-coll/manuals/manuals.html

Sounds like the head is tripping the GFI, either throwing a spike or a dead short. Check the head for shorts in the plug, the fan, the lamp.

And yes try it in a regular non-GFI outlet.

I hope you'll let us know how this turns out?

 

[michaelbsc]

Sounds like the head is tripping the GFI, either throwing a spike or a dead short. Check the head for shorts in the plug, the fan, the lamp.

And yes try it in a regular non-GFI outlet.

I hope you'll let us know how this turns out?

What causes a GFI to trip is an imbalance between the hot and neutral. The assumption being that power is flowing out but not returning through the proper route, and possibly through you.

Check if your neutral and ground are shorted in the head. Or if neutral is open in the head. These would allow the device to "work" on a regular outlet, but trip a GFI.

 

[tkamiya]

If the GFI only trips when the head is connected to the power supply, then I'd concentrate on closely inspecting all the cables, connections, and what's in the head. All it takes is damaged insulation, dense cobweb that got wet, dead bug across terminals, etc to cause 5mA or less of leakage. A dead short will trip regular circuit breaker. Tripping GFI is already indicating there IS a leakage somewhere. If you do connect it to non GFI outlet, please be careful. You already know there IS a problem....

Michael has a great idea. Yup, open return (white wire) will cause this condition too....