Replace Wells-Gardner Monitor Circuit Board?

[deweyhewson]

I have two Wells-Gardner K7000 series monitors. I had thought my first (a K7400) was broken, so I bought a replacement (K7100), and then later found out my first one wasn't broken after all. Doh!

Here's my problem: the first monitor suffers from a wavy picture and one half of the screen is brighter than the other. Other than that, the image is pristine with zero burn-in and perfect colors. The second monitor - the replacement - has a perfectly fine image in terms of brightness and sharpness, but the CRT itself has horrible burn-in making the colors almost appear inverted on about half the image.

So, I know the problems of the first monitor can be fixed with a cap kit (right?), but I'm wondering if it would be possible to just take the circuit board from the K7100 and swap it with the circuit board on the K7400. Would that work? And, if so, do I need to discharge the monitor before doing it?

[Deadly]

Easy enough to find out if it'll work. You need to test the both yokes with a digital multi meter and compare the vertical and horizontal impedences. If they ohm out to be about the same and of course assuming the pinouts on the tubes are the same you'll be fine

[Ken Layton]

I have two Wells-Gardner K7000 series monitors.

So, I know the problems of the first monitor can be fixed with a cap kit (right?), but I'm wondering if it would be possible to just take the circuit board from the K7100 and swap it with the circuit board on the K7400. Would that work? And, if so, do I need to discharge the monitor before doing it?

You do NOT have two K7000 series monitors. You have one K7400 and one K71xx.

Both are TOTALLY different monitors. Don't even think of swapping boards.

One requires an isolation transformer and the other doesn't.

Yes your first one with the wavy, uneven brightness probably needs a capkit.

[deweyhewson]

Just as an update, I did actually have two k7100 series monitors, not a k7400 as I had previously thought.

I swapped the circuit board from the monitor with the bad CRT into the monitor with the bad circuit board and I now have a perfect picture! Just so anyone else wondering this in the future knows - since I had to just hope for the best and do it myself - you do have to degauss the monitor as the anode must be removed as it's connected to the circuit boards you'll be swapping.

I have now finished the cab, so if anyone wishes to see it and tell me whether you love/hate it, here it is:
http://forum.arcadecontrols.com/index.php?topic=99816.0

Thanks again for everyone's help throughout!