Ms Pacman Cocktail GO7 Degauss Issue

zz0ljf

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The GO7 in my Ms Pacman cocktail won't degauss when the cocktail top is closed. I've used a degaussing coil but it doesn't have any permanent affect. When the top is open and laid on it's side the picture is perfect. What am I picking up electromagnetic interference from and how do I shield it?
 

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is your yoke tight?? if a deguassing coil doesn't work than maybe its a purity issue and if your yoke is loose it could move when opened and closed on a midway cocktail.
 
Does your power brick have a metal shield over it?


try moving the game to some other location and see how the earth's magnetic field affects it in different locations.
 
You need to really work the coil around the table. Don't just pulse the top of the tube. Move it around, even down around the side of the table. Eventually you will get it.
 
seconding security... see if the yoke is loose. you shouldn't be able to rotate it by hand. if it slips away from the face part of the tube it can do this. could potentially be rings that were monkeyed with too. try turning the cabinet 90 degrees and see if that clears it up at all.

you want to go in a big circular motion around the face of the tube and gradually move backwards and away from it with the degauss tool.
 
The yoke is tight as are the rings. The original glue is still on everything and nothing will move without removing it. When the top is open the image is perfect as in the attached. It's only when the top is closed that it's picking up EM from something inside the game. Really odd. I've tried rotating and moving the game but it doesn't change the degauss issue. Any other suggestions? Eveything appears to be bone stock in the cabinet.
 

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The yoke is tight as are the rings. The original glue is still on everything and nothing will move without removing it. When the top is open the image is perfect as in the attached. It's only when the top is closed that it's picking up EM from something inside the game. Really odd. I've tried rotating and moving the game but it doesn't change the degauss issue. Any other suggestions? Eveything appears to be bone stock in the cabinet.

I've had newer midway cocktail cabs (tapper style) and they had a shield over the transformer to stop the degaussing issue. I'm not sure if the pac's ever had one. Maybe someone else knows.
 
The shield over the power brick doesn't prevent gauss issues, it prevents image shake.

To the OP: rotate the game 90 degrees.

Or move it to another part of the room.
 
The shield over the power brick doesn't prevent gauss issues, it prevents image shake.

To the OP: rotate the game 90 degrees.

Or move it to another part of the room.

yeah that's right.

I was thinking, moving the game around the room should help as well, but I think he's tried that already?
 
I'm not an OP not sure where that's coming from. And yes I'd tried moving the game around and rotating it in my garage without any luck. I even pulled it out into the driveway quite a ways, still the same symptom. Tonight I moved the game down into my basement arcade and I found a sweet spot where the monitor isn't picking up interference. It's really really sensitive though. Rotating it 90 degrees didn't help just had to find a spot on the floor where the EM was minimal. Not sure why this monitor is so sensitive.
 
OP means

(O)riginal (P)oster

make sure you degauss it after moving it around. You may find your sweet spot after all.
 
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