Vertical Hold?

Tropman127

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I am very new at monitor repair. I have an old Hatrick Hockey game and it was working fine and the monitor is acting up. Its not exactly like a veritcal hold where the picture keeps moving but more where the picture is blooped up in the middle. It starts out ok on the left but then bloops up bigtime in the middle and then returns to the correct level at the other end of the screen. Im hoping that there is some sort is adjustment i can make when i open the game. Any ideas would be very much appreaciated!

Thanks
 
Thanks for the reply. Ill have to pull it apart this weekend and take a look. When i do, hopefully you'll be around to help since i have no idea.

Thanks again!
 
Monitor prob

Ok, this is a pic of the problem (not exactly what i described, i remembered it wrong) and this is also a pic of my chasis. Any thoughts?? Please help!

Thanks!!
 

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if you haven't done any changes to the chassis before it messed up, that I'd think you should start by replacing all the electrolytic caps. You can try adjusting your H-Hold and V-Hold pots, but I doubt it will change anything.

of course, if you were messing with those black switches and then it messed up, I'd have a different answer...
 
Didnt touch anything

I didnt touch anything, it was working fine and then all of a sudden this started (while playing).

Ill try the H hold and V hold in the meantime.

Thanks!
 
H Hold

I adjusted the H hold and was able to get the screen to be good but the picture was slowly moving across the screen. Is that still the H hold? The h hold was so tempermental, is there some way to make it less tempermental? Even when i got the picture right, it would get messed up again when i simply took my finger off the knob.

Basically, it seems like it will keep happening unless there is something that i can to do to hold it there.

Any thoughts?
 
You need to replace the electrolytic capacitors on the monitor chassis. The capacitors have a certain range that they work in, giving you a certain size window to adjust your H-Hold pot into to get it to lock. As they age, their value changes and that window gets smaller and smaller. Eventually, it'll be so small, it'll be like trying to balance your car on the point of a needle while you wash it. Replacing the caps with new ones will give you back the larger range of good hold...
 
thanks

Is there a page somewhere that has what the electrolytic capacitors are exactly? Maybe a page with a diagram or something. Or where i can get them?

Im going to look around, but if anyone knows where that would be great.

Thanks for your help!!
 
According to the number on your chassis you have a Kortek KI-2-VOA.

Bob Roberts sells the cap kit for $5.00 plus shipping. It will come with an instruction sheet listing each cap and the locations they should be installed. If you know how to solder, and know how to install parts with respect to proper polarity, then it should be a fairly easy process.

Bob Roberts only accepts checks, so you'll need to e-mail him with your order (look around his site to see if you need anything else while you're there). Include your name and address with the order. He'll respond with the total including shipping. Mail him a check and he'll mail you the parts. Once he has done business with you, he'll ship the parts BEFORE he receives your check. Sometimes he'll even do this for new customers if it's a small order. Just make sure you send the check, otherwise you get listed as a Bad Trader, and can no longer order from him (and we'll all give you shit about it).

Bob ships really fast, often includes free "surprises" inside the boxes, and is a real asset to the collecting community. He often is the cheapest (and only) source of a lot of things we need to fix our games...
 
ok great!

Thank you so much for your help. Im not sure how to install, but ill figure it out. My brother is an electrician so maybe he will be able to help. I will of course pay. After all of the help ive received already, how could i not.

thank you so much!

Scott
 
Looking at the pic it is definitly a horizontal hold problem. What I can't tell is whether there is also a vertical hold problem? Does the monitor roll vertically as well? If so these fail at the same time almost always due to a problem with the sync connection and the cap kit alone will not fix it although it may fix other issues. Look to make sure the sync connector or its wires are not loose. The sync connector runs from the game board to the monitor and is accompanied by the R,G,B, and ground connections. If this is not the original monitor for the game than this can be the problem. Depending on the game, the horizontal and vertical syncs can be seperate or combined into composite sync before being connected to the monitor. This connection may have to be modified to accomodate the swapped monitor usually by either adding or removing a jumper. Common symptons of a sync connection problem are a picture that can't quite be adjusted to hold or sync. Often it will sync momentarily then begin rolling again and have a very narrow adjustment range. Your monitor shows a horizontally rolling picture, but due to the much faster horizontal refresh rate (15,500hz) than the vertical(60hz) the human eye can't track it.
 
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