The best way to fix this is by replacing the cheapest parts first (unless you can track down the fault with a scope).. Start with the TL081/2's, then the 4016's. Before you change out the DAC's be sure they are getting a signal (actually you should probably start here). Look at pins 4 - 14 for activity. Typically, the op amps seem to die on vector boards.
Jon
At 08:17 PM 6/1/2000 +0100, you wrote:
>In article < >, Jon
>Raiford < > writes
> >This sounds all too familiar..
>
>Thanks. Following that I fixed some problems in the vsm and my board now
>runs without tripping the watchdog... but now I'm getting a steady
>6.5volts on the y-out and a steady -13.2volts on the x-out :-/
>
>I'm told "it might be a prob with the position counters and that kinda
>area or the dacs :(". Any more advice?
>--
>James G Watt
>
>http://www.kinetic-arts.demon.co.uk
>Part of the Video Arcade Game Collectors WebRing.
>
>You are in a maze of twisty little passages, all alike.
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