Comet
Williams, 1985
Space Shuttle
Williams, 1984Hi ! I have a Space Shuttle and the game was working fine. But then, all the displays gone blank. I checked the voltages and instead of -100v in the power supply I was getting -125v. So I changed one of the zener diodes and I get the proper voltages +100 -100 and +5. But the displays are still blank. I tested the blank signal at the CPU ( 1J3 pin 12) and I get 3.3v. Maybe that is too low? Any suggestion in where could be the problem?
Thanks
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Homer Glen, IL