(Topic ID: 239634)

Stern MPU 200 Split Second Help


By Tsskinne

1 year ago



Topic Stats

  • 7 posts
  • 5 Pinsiders participating
  • Latest reply 11 months ago by Tsskinne
  • No one calls this topic a favorite

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    #1 1 year ago

    So I have tried new SDB and an Altek and same problem as my original boards. I have no 7th Flash. I have 43 volts at rectifier (also new) and solenoid driver board, but not at MPU. It’s like 67 volts or so their. I had repinned all connectors going to the MPU and I’m guessing I screwed something up. Any help would be greatly appreciated.

    #2 1 year ago

    Post very clear pictures showing the wire colors of the re-terminated connectors at J3 of the rectifier board and J4 connector at the MPU board.

    #3 1 year ago

    Is your sound board connected properly? Most classic Sterns won't boot without it hooked up.

    #4 1 year ago
    Quoted from Thrillhouse:

    Is your sound board connected properly? Most classic Sterns won't boot without it hooked up.

    I believe so. It makes a boot up sound and the beeps that go with the flashes as well.

    Quoted from Quench:

    Post very clear pictures showing the wire colors of the re-terminated connectors at J3 of the rectifier board and J4 connector at the MPU board.

    I’ll have to get those pictures tomorrow I removed the game from location and it’s still in back of my car.

    Thank you both for the help.

    #5 1 year ago

    The 43 volts for the zero crossing comes in on the MPU at J4 Pin 15. That wire comes from rectifier board J3 pin 12. What voltage do you have there?

    #6 1 year ago
    Quoted from Thrillhouse:

    Is your sound board connected properly? Most classic Sterns won't boot without it hooked up.

    That's news to me. There's nothing in the bootup code requiring acknowledgement from the sound boards.

    1 week later
    #7 11 months ago

    okay so just to update...I did do all the connectors correctly. However, the wire that carries the 43 volts to MPU, as well as the wire for the start button, did not have good crimps which caused my issue(s). All seems good to go now.

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