Ms. Pac/Galaga 20th monitor gauss in corner

mecha

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I know that the poles can factor in the monitor becoming gaussed and all, but this is kind of ridiculous. we moved our Ms. Pac/Galaga about 3 weeks ago from where the game was facing west to a spot where it now faces north. I noticed that the upper right corner was magnetized in the new spot and tried degaussing it to no avail.

as soon as I turned the cab back to how it faced before, it goes away completely. no game around it is affecting it, it's literally the way it's placed. if I started turning the game facing east, the entire screen would become red and green in the middle, as if the magnetic interference is shifting from right to left.

I noticed the yoke was a little crooked and straightened that out and remembered that the yoke placement could have something to do with the monitor getting magnetized, is this true?

the convergence is kinda fucked on it along the sides (the top and bottom if the monitor was oriented horizontally obviously), but the rings are still in their factory sealed position so I left it alone.

the monitor is a WG K7400.

as an added bonus, I forget if the K7400 had an additional width pot near the width coil or not, I need to decrease the overall width on it, the pot on the remote board won't go any narrower. I lack an adjustment tool for the width coil... should probably get on the horn to Bob soon.
 
try degaussing it again.....but this time walk behind the machine and rotate the coil as you would if you were in front of the game. I know it sounds silly but I saw this work when the front degaussing method wouldn't get rid of the problem.
 
I was also wondering if the way how the monitor sits so low would have something to do with it too.

I actually don't have a degauss tool, I was using a soldering gun and a drill lol. it was making a difference overall, but it wouldn't go away from that one spot in the corner.
 
i have more than one and they all do the same thing. yes, it pends which way the game is facing. a degauss wand will not help.
thats just how those are for some reason.
 
i have more than one and they all do the same thing. yes, it pends which way the game is facing. a degauss wand will not help.
thats just how those are for some reason.

thank you sir, that's exactly what I was looking for.

I personally think it's the angle the monitor's mounted in the cab. I'm really not too keen on removing it to be sure however. lol

any ideas on the width coil issue I'm having? is that something you've seen in these before?
 
there is no additional trimpot near the hz width coil. if adjusting that does not help, a cap somewhere could be making it too wide. is it very wide oversized, or just a little?
 
like by just a hair, you either cut off the score at the top or you cut off the bottom. if you throw it in monitor align, you can't see all 4 corners. the H-size setting's kind of anemic... it can go super big, but like 3/4 of the pot adjustment's just dead. I would think it might take more from the electronics to make it narrower than wider, wouldn't you say? (cap-related)

did I mention the convergence is kind of terrible on the top and bottom (like the actual top and bottom of the monitor, not the game)? you see lots of separation between the red and the blue on the crosshatch. it's probably not worth messing with it though, I said before that the rings still have the factory seal on them, not gonna tinker with it.

you could be right, it might need caps. it's really not that old, was mfg'ed in 2004, but I figure this video's actually a money maker, might be in my best interest to go over the monitor/make sure the B+ is solid/etc. it could have also shipped with a bad run of caps too. I think the monitor itself had a 2003 mfg... kind of weird finding a video game with all the original tags isn't it?? won it at a Namco auction last year.

I think I ordered a K7400 kit for another machine we got that's running one... might apply that to this one first. we're actually going to be open Sunday, I don't foresee much business though the day after x-mas, might be a good day to cap it.

I'll just have to move it somewhere else I guess. I'm pretty bummed by it, cause I had a wall with my DK and PC-10 and the 3 of them were making decent money there.
 
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