Electrohome G07 issue......

Swillie

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Hello. In short when cold the screen looks crazy, vertical lines scrolling left to right very fast.... after a couple minutes the screen starts to straighten but with curling on the right side.... after about ten minutes or more the curling straightens out finally. I did a cap kit from LizardLick a few years ago (NOT the flyback or HOT, just replaced the caps), which improved the picture if I remember but never solved the warm up problem. Recently the curling would never straighten out at all...I just checked the B+, it was 109V, so I adjusted that to 120V. Than I adjusted the V-hold and V-lin pots and now it straightens out perfect, but still only after it is warmed up.

Any ideas???? Is there a proper technique for adjustment to those pots, or are there ones that I am missing???? when it comes to setting those I feel like I don't really know what I am doing, just trial and error. The flyback is dirty but looks intact, no cracks that I can see.

Not sure if it matters, but the cabinet looks to have been a Stern Scramble which was converted to a Taito Big Event Golf.

Thanks for any help. Steve
 
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If you did a standard kit, not all caps were replaced. It's possible that one of them is "on the cusp" as it were.

Did you reflow solder? I redo the entire neckboard, power supply and any other suspect joint on any rebuild.
 
Just a standard cap-kit. I don't recall if I reflowed the solder at the video header pins that i have read about, don't think I knew about that at the time. I was going to check them but thought i would gather as much info as possible before I pull the board. I just checked and the horizontal width coil is ascew a bit and no adjustment knob on it. I read up on Bob Roberts site about how to adjust/center a monitor and I think one thing throwing me off was that the monitor is turned vertical, so the vertical lin/height adjusts horizontal(left/right) for this perspective. There is a <inch gap at top and bottom which i can't adjust because of the missing knob on the h-width coil, right? So I centered and widened the screen nicely and than carefully put the v-hold and h-sync pots thru a full range of motion and than adjusted them back and forth a bit , putting h-sync closer to the 3 oclock position( read that somewhere) and the picture is holding steady with very minimal curl along the side (which really is the top). I powered down and up after 10 minutes and it came back pretty straight and warmed up within a minute. I have to go to work, when iI get home I will see what happens. Can't believe it has just been out of adjustment all this time but I just couldn't get it right before.

I am fighting the urge to pull the board anyway and replace the h-width coil, flyback and HOT , than reflow solder to finish what I started, but i hate to break something else in the process when overall it is looking very good.........
 
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Looks good as soon as you power it up now. Just can't let go of my old golf game.
 
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