Degaussing coil only works on 230vac

[big10p]

I have a monitor that the manual states will work with power in the range 90-264vac. I'm powering it off a 115vac iso (although the monitor can take direct voltage).

The degaussing coil isn't working so I thought the PTC must need replacing, but when I temporarily connected the monitor to mains 230vac, the degaussing works.

The manual doesn't say the degaussing circuit needs a certain voltage to work, so does this mean that replacing the PTC should fix it? Or, maybe the iso can't provide enough current?

I know I could just hook up the monitor to mains in the cab, but I would like to keep all the original wiring the way it is, if possible.

 

[tb2000]

What monitor is it?

 

[big10p]

What monitor is it?

It's a Tovis 1901CN AKA Happ Vision Pro.

My 115vac iso is 1amp rated, and the monitor maual says power consumption is less than 70watts. My guess is the iso is fine for powring it, but the monitor needs more than 1amp for the inrush\degaussing?

 

[LawmanAUT]

I guess it depends on the monitor, the Hantarex 9000 for excample also needs 220v for degauss.

 

[M K L]

If the switch is after the PTC, the degaussing will never work as the PTC will get hot at power on and stay like that so when you press the switch nothing will happen.

 

[big10p]

I guess it depends on the monitor, the Hantarex 9000 for excample also needs 220v for degauss.

This Vision Pro monitor works with direct 90-264vac power, and doesn't have a separate power connector for the degauss circuit, like other monitors do. The manual talks about the automatic degaussing, but doesn't say anything about it needing a certain voltage to work.

I'm going to replace the PTC to see if that helps, but I doubt it will. lol

 

[big10p]

If the switch is after the PTC, the degaussing will never work as the PTC will get hot at power on and stay like that so when you press the switch nothing will happen.

That's the discussion in my other thread. I thought the same as you, but maybe without the load of the degaussing coil pulling current through the PTC, it won't heat up much? I don't know, which is why I was asking for a sanity check.