(Topic ID: 115894)

Goldeneye blows house fuse

By tezting

6 years ago


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  • 29 posts
  • 7 Pinsiders participating
  • Latest reply 4 years ago by Koos
  • Topic is favorited by 1 Pinsider

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#19 4 years ago

Too bad this problem doesn't seem to have a solution yet. I live in The Netherlands (also [email protected]) and am having the exact same issues with my first pinball machine!

It's a Pirates of the Caribbean and I already ruled out the switch itself by keeping that on and just pulling the power plug. 4/5 times I don't have any issues but that 1/5th time the fuse in the house trips and I need to reset that.

I keep the pinball machine plugged in and can reset the house's fuse without any issues. So there isn't a constant short circuit or something.
Houses here have a 16A fuse per group. No other power intense devices are on this same group of outlets and I already moved the pinball machine to other outlets in the house to rule that out.

Also no visible damage to the power cord and no fuses are blown inside the machine since the house fuse was faster I guess.

I have a multimeter but am not sure how I can resolve this issues with that.

Please help!

#21 4 years ago

I might have found a solution on another website. Have also spoken to a pinball technician in The Netherlands about this and he confirmed this should solve the issue.

From what I hear this problem happens more in Europe than in the USA. I have no idea if this is because of the 110/220V difference, or because of the type of breaker/electrical wiring used.

I'm awaiting my part today and post results!

This problem is caused because when you switch on the game, the transformer (and other parts of the game) suddenly require a lot of electricity. It causes a sudden load, the main breaker of your house thinks there's a short somewhere in the circuit and resets. Bam - your whole house is without electricity..
There's also a reason why it doesn't happen all the time. AC is a wave which goes up and down, 50 (or 60, depending on what part of the world you're in) times a second. When you switch the game on while the wave is at the bottom, you usually have enough margin so the breaker doesn't act, switch on the pinball machine while the wave is at the top and the circuit gets overloaded.

There are two solutions for this. The first is a workaround - you can add more resistance to the wiring (so the main breaker becomes slower to react), try to plug in your pinball machine in a long extension cord instead of directly into the wall. The extension cord can help solve your problem.

The correct way to solve the problem is to install an NTC. NTC stands for Negative Temperature Coefficient, another word for it is thermistor. It's a resistor that changes its value with its temperature. It's job is to limit the inrush of current when you turn on the machine.
Turn on the pinball machine and the thermistor will limit the inrush of current because of its resistance. Once the machine is on, the resistance of the NTC lowers, not influencing the circuit anymore.

Source: http://www.flippers.be/basics/101_sys11_house_fuse_trips.html

#27 4 years ago

Yep! The NTC resistor (thermistor) did the trick!

Apparently newer houses (like mine from 2010) have circuit breakers that react very fast. A peak in the circuit caused by the pin is incorrectly seen as a short circuit. The NTC resistor makes sure that peak is not created as it's a 5 Ohm resistor upon startup. It's a € 0,90 part and some easy soldering inside the metal box under your playfield. My pin works perfect now and no more running back to the circuit breakers anymore!

If you need additional help PM me. But it's really straightforward. Pictures inside that link I posted earlier.

Hopefully this is helpful for other people in the future as well.

#29 4 years ago
Quoted from tezting:

Awesome.
Could you tell me the value/spec of the NTC? I will try and find it on eBay

I bought a NTC 5 Ohm which appeared to be available at a lot of pinball parts (web)store's. Figures...

It looks like this:
http://uk.farnell.com/productimages/standard/en_US/07P7901-40.jpg

And I did solder it between the brown wire (phase) and before the fuse. In this picture (on the right!) they soldered it after the fuse but I don't think that would make any difference:
http://www.flippers.be/images/art/ntc02.jpg

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