(Topic ID: 136174)

Taito ICB PCB Quiz: Which board will NOT light the Star?

By ChrisHibler

8 years ago



Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 8 years ago by MrBally
  • Topic is favorited by 1 Pinsider

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    #1 8 years ago

    Taito Ice Cold Beer isn't a pinball, but I can stretch it a bit.

    I repaired an ICB MPU for a fellow PinSider and was testing it 100% when I noticed that it wouldn't light the "Star" on the info panel. The reason is evident in the picture below. The bottom board in the pic works 100%. The top board won't light the star. Can you find the difference/problem?
    image.jpgimage.jpg
    image.jpgimage.jpg
    --
    Chris Hibler - CARGPB #31
    http://www.Team-EM.com
    http://webpages.charter.net/chibler/Pinball/index.htm
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    #2 8 years ago

    diode / resistor mix up next to R11 done at the factory

    do i get a free beer!!?!?!?

    #3 8 years ago
    Quoted from barakandl:

    diode / resistor mix up next to R11 done at the factory

    Bingo.
    Stuffed wrong from the factory, a resistor was stuffed where a ferrite bead should have been stuffed. This board has NEVER been able to light the star. Good eye Andrew. I found it after tracing the circuit.
    --
    Chris Hibler - CARGPB #31
    http://www.Team-EM.com
    http://webpages.charter.net/chibler/Pinball/index.htm
    http://www.PinWiki.com - The Place to go for Pinball Repair Info

    #4 8 years ago

    Stuff like that can be a head scratcher. I actually pulled the schematics first, but couldn't find the star light on them so i did the old picture seek and find hehe...

    one of these things is not like the other doot doot.

    #5 8 years ago

    FB=Ferrite Bead. Diodes usually have a "D" prefix.

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