Centipede monitor issue

way

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Is this a yoke problem? This is the very first game I have worked on. You can see that the screen is "squished" slightly on the right side. Any help is appreciated!

Way
 

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G07 monitor. Had a bit of a jolt when moving which may have cause the problem. Here's another pic. Image is off centered and wavy.
 

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if a G07 hasn't been rebuilt than i would do a cap kit, flyback and reflow at a mimimum. optional things if needed would be B+ pot, neck and main pot kits, width coil if burned/broken, etc. we stock all the best quality kits/parts.
 
There is a vertical linearity (should be marked as VLIN) control on the G07 that you might try to adjust. That combined with the vertical height adjustment might sort out the slightly squished part on the right side (on Centipede, the monitor is actually on its side, so the monitor's vertical axis is the left-right axis on the game). For centering, there is a little wire that connects to one of three tabs to center the horizontal and another one for the vertical (best to turn the monitor off before trying this adjustment and don't be disappointed if it doesn't move the image a whole lot). But honestly, it looks pretty decent to me.

A yoke problem would either show up as having the entire image at a crooked angle, or the colors would be off in certain areas, neither of which I see in those photos. Don't mess with your yoke at all.
 
I always forget they have vertical linearity adjustments. :p alas, I see now what your issue is. I would hold off on the adjustments until you re-cap the chassis and mandatory replace the flyback, as they're probably out of whack from the old caps to begin with... and you'll inevitably probably have to fix everything again anyway.

seconded on not touching the yoke. don't touch the rings, anything.
 
I would hold off on the adjustments until you re-cap the chassis and mandatory replace the flyback, as they're probably out of whack from the old caps to begin with... and you'll inevitably probably have to fix everything again anyway.


...and I would hold off on recapping the chassis until you try the adjustments! If tweaking a couple pots fixes the problem, I see no reason to go through the trouble of recapping it. Many people are in the habit of recapping any monitor automatically and that's fine--the caps do fail with time and can cause all sorts if issues--but it also doesn't magically fix everything either. I can't count the number of times I've recapped a monitor, turned it on, and it looked exactly like it did before. So I'm more in the "if it ain't broke don't fix it" crowd.

To be clear, the problem you're seeing with that monitor COULD be a result of failing caps, but it could also be a minor adjustment that has nothing to do with caps at all. Adjusting the monitor with the pots is simple and quick, and it's something you'll want to be familiar with anyway. If adjusting the VLIN doesn't help, then of course recap it to eliminate bad caps as a source of the issue, but if a quick adjustment is all it takes to get your game looking great, then I'd just stop there and enjoy it for a while.

There's no wrong answer here, just a variety of paths to take to the correct one.
 
Thanks fcjim, mecha. I have found where the adjustments are and have fiddled with them. Yes, the centering jumpers do not do much but did help. The vertical linearity and height adjustment are helping and the image is now much better. Image still has a slight "wave" to it and the Atari logo still tilts down to the right. But still a lot better than before and definitely playable.

I'll play around with it a bit more. Perhaps re-cap etc. are needed in the future. I'll hold off until I get more familiar with the machine.
 
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