(Topic ID: 251306)

System 11 rt jet bumper not working


By Pinballpiddler55

32 days ago



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  • 5 posts
  • 2 Pinsiders participating
  • Latest reply 32 days ago by Pinballpiddler55
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    #2 32 days ago

    Your post is a little ambiguous, so let me see if I can clarify:

    "ran a jumper from the connector wire to the coil" = You ran a jumper wire from ground to the correct ground pin on the driver board connector for the jet bumper coil and it fired: That means the coil is fine, the wiring from the board is fine and the coil has power.

    "went from resister tab to ground" = I assume you mean you grounded the TIP122 transistor on the driver board and the coil didn't fire? : That means either the transistor is bad or the wiring from board to the coil is bad. But since you confirmed the wiring in the first test (assuming that's what you meant), then the TIP122 is likely bad. Do you have a meter with a Diode test setting?

    Also, which system 11? Not that it matters, but jet bumpers are special solenoids and treated a little different. Not sure how much it changed from 11, 11A, 11B to 11C, but it may have some significance.

    Grumpy, Sheprd and Clay provided some good advice on troubleshooting specials here: https://pinside.com/pinball/forum/topic/how-to-troubleshoot-special-switchessolenoids

    #4 32 days ago

    If the coil fired, then the transistor and predriver are both ok. So its either the bumper skirt switch or the NOR gate. Try grounding the bumper switch to see if it fires. The schematic for your game is useful here to identify the wire color from the switch...otl be labled ssXt on the diagram where X is the switch number.

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