(Topic ID: 321854)

Gottlieb System 3 (Gladiators) DMD out

By ShelShock

1 year ago


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  • 13 posts
  • 5 Pinsiders participating
  • Latest reply 1 year ago by donjagra
  • Topic is favorited by 1 Pinsider

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#11 1 year ago
Quoted from SantaEatsCheese:

Sure enough my D8 is dead on the display board and is likely my problem. One is coming in the kit I ordered so hopefully it will be back up soon.
[quoted image]

Gotlieb used individual diodes instead of a bridge rectifier on these boards and yours is blown. Fingers crossed that replacing it resolves the issue. If you replace it and it blows again, then you have a problem with your transformer panel in the bottom of the cabinet. The display is fed directly from the transformer to the rectifier and and is an isolated circuit. I don't know of a way to repair the transformer and a replacement might be hard to find.

#13 1 year ago
Quoted from SantaEatsCheese:

Yep... As per post above replacing the bad diode fixed it. Video on troubleshooting and replacement above.

Yeah... I should have realized this was a solved post. I think I'm still traumatized by the six months I spent on one of these that did need a transformer. In case you want to see the schematic of the transformer circuit that powers the dmd, might be useful for the next guy. It's the 95v with the F3 fuse.

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