(Topic ID: 70319)

TECH: Sega Ball Trough Opto

By ArcadeUpkeep

7 years ago

Topic Stats

  • 7 posts
  • 3 Pinsiders participating
  • Latest reply 7 years ago by ArcadeUpkeep
  • Topic is favorited by 1 Pinsider


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#1 7 years ago

Anyone know the part number or where to purchase the optos used on Sega ball trough single opto boards (BF specifically.) I heard both the transmitter and receiver are the same part but I can't find it on Marco (where I'm putting together an order.)


#2 7 years ago

I believe this is what you are looking for:


#3 7 years ago

Yes but I'd rather just the opto itself not the whole board.

#4 7 years ago

Are you talking about the LEDs on the board? Sega/stern just use ultra-red leds, unlike wms who used an infrared transmitter and receiver.

Check out this pinwiki entry:

It includes a link to the Stern schematics for the trough opto boards.

#5 7 years ago

By the way, what problem are you having? Have you just tried reflowing all the solder on the opto boards? These are notorious for bad solder that cracks and causes problems.

#7 7 years ago

When I got the machine the receiver LED was reversed, I put it back to test it but it still doesn't work. I assume reversed fried it. I've reflowed the connections. The emitting LED still works. Thanks for the links, I'll order a few and replace the set.

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