Neo Geo (19K7101 Wells Gardner 25") Width Adjustment

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Neo Geo (19K7101 Wells Gardner 25") Width Adjustment

I've had this problem since I first picked up this Neo Geo cab. The picture on the monitor is too wide. The only way to adjust the horizontal width is by turning the width coil on the monitor board. So I bought the little plastic tool and tried to adjust it to no avail. I can get it to go a little bit wider but not narrower. Any ideas what I would need to do so I can get the picture to fit the monitor properly?

Do I need a new width coil maybe?

19K7101 Wells Gardner 25" is the model
 
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http://therealbobroberts.net/width.html

http://therealbobroberts.net/k7000.html

I believe I have the original monitor in it. I've never done any monitor repair. So I want to make sure I don't fix something that isn't broken haha.

**edit**
Maybe I just need to do this:
Trial & error may be the best way for the hobbyist to tune in the width circuit... if need be. For example, if you have a K7000 chassis that has a pic off the screen & cannot be reduced with the width coil and a .15uf cap is installed in C38 position, simply pull the chassis & remove this cap & install a .33uf cap & slip the chassis back in... secure at least 1 screw... and fire it up & take a look at your results. If it's okay, power down & finish up your installation. Needs fine tuning.... pull it out & adjust to your guess for a retry. Since this is not going to be something you do everyday... maybe only once in a lifetime... I think this would be the easiest way.

Wells-Gardner K7000 Series - C38
 
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C38 is what you need to be looking at. after a full cap kit.
however, if you have a 19k7000 chassis on a 25" tube that could also be part of your problem. or is it a 25k7000 monitor?
 
I did a cap kit on one of my monitors and still nothing. It turned out that the pot on the adjustment board was cracked. It might be worth a look.
 
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