(Topic ID: 198437)

Stripping wire with machine off killed power to entire house

By ryanwanger

6 years ago


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  • 31 posts
  • 22 Pinsiders participating
  • Latest reply 6 years ago by rotordave
  • Topic is favorited by 5 Pinsiders

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#1 6 years ago

I'm working on a TZ that has been possessed lately. Lots of resetting, fuses blowing, etc.

I am swapping out the coil that kicks balls into the shooter lane (because, oddly, the center of the coil has an unidentified melted mass inside it so the plunger can't be pulled through). I cut off one of the wires, and then stripped it. And the power in the room went out and came back immediately.

It actually happened twice in rapid succession, as I touched the wire twice. Incredulously, I did the same thing again, stripping the wire with my tool, and it happened again. Not only was it the circuit the game is connected to, but power to the *entire* house went out.

(No circuit breakers were tripped).

WTF is going on?!?

#4 6 years ago

I should note that this TZ was on location having issues, and this is the first time I've tried to work on it since bringing it home.

Quoted from dr_nybble:

Do dee do do, do dee do do . . .

They really went overboard on the theme integration.

#7 6 years ago
Quoted from Shredso:

Very strange. Is it possible someone messed with the power switch? Maybe it's switching the neutral instead of the hot? Do you have a plug tester? Try it in the service outlet.

Tell me more about this. I did have a soldering iron plugged into the service outlet at the time (which was working fine). I don't have a plug tester, but I do have a multimeter.

#11 6 years ago

I'm really confused about this. I got a text shortly after from my location (about a mile away) saying that I should check on my games tomorrow because they were having power surges. It's possible this was a coincidence...but it was literally two outages about 60 seconds apart...both at the *exact* moment that I was stripping the same wire in TZ.

Our internet shut off and the router restarted itself...but the clock on the stove didn't reset.

Welcome to the Twilight Zone.

I was afraid to keep working on it, but will probably give it another shot tomorrow.

#13 6 years ago
Quoted from flynnibus:

My TZ has voltage hot even when the game is off. Mine has been rewrired from 220V and the coin door doesn't break the high voltage... so I intend on digging into if they bypassed it when rewiring the transformer. But I still get 60v on the coil when the game switch is OFF. Which it shouldn't be at all.. but maybe yours is similar in someway.. so your shorting is popping the circuit too.

Keep me posted on this. Mine coin door doesn't break the high voltage either, but I had assumed this was right before coin door interlocks became a thing.

#21 6 years ago
Quoted from goingincirclez:

The obstruction in the coil is a melted sleeve, which means it locked on solid. Unless you find some other kind of physical short (frayed wire, or a loose, shorted bracket, etc) I would look at the corresponding transistors on the board. Typically there's no reason a ball kicker should short or stay on that way, so this is a pretty good indicator there are problems upstream.

Actually, it's not the coil sleeve. There is still a sleeve in the coil, but it won't budge, so I can't get it out. I'll take a pic later when I can.

Quoted from jorro:

Unplug! Dont burn youre house down

That's of course the first thing I did. Will report back later when I start poking around.

#30 6 years ago

So...service outlet checked out correctly. 120V on hot side, 0V on neutral side.

I recreated the same action with the wire strippers that caused the issue the first time...and nothing happened. So, I'm going to chalk this up to neighborhood power grid issues, which were happening on that same night. Honestly, it's one of the biggest coincidences of my life: neighborhood power goes out twice, each time synced to the exact second that I'm stripping a wire to a bad coil.

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