Asteroids board problem

I had exactly the same problem a couple of years ago on my first Asteroids
cab.

If you look at the pattern repeating you can see that its likely to be a
problem with one of the low order bits getting stuck hi/lo on x axis dac,
etiher on the way to, or in the AD561. In my case simply swapping in a new
561 solved all problems.

Odd thing was that before the eventual fault showed up, like yours is now,
I could see it gradually getting worse over the period of a few days until
it finally went dud, and it wasnt a sudden fault.

Arch

Message text written by INTERNET:vectorlist@synthcom.com
>
Anyone ever seen this problem?

http://www.mylstar.com/astprob.html

or better yet, know a solution?

Other boards test good in this cabinet.

Thanks for any help.

-Stephen<

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Received on Mon Feb 10 00:31:01 2003