(Topic ID: 251306)

System 11 rt jet bumper not working

By Pinballpiddler55

10 months ago

Topic Stats

  • 5 posts
  • 2 Pinsiders participating
  • Latest reply 10 months ago by Pinballpiddler55
  • No one calls this topic a favorite


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    #1 10 months ago

    Have a rt jet bumper not working everything else on this pin works.
    I so far have ran a jumper from the connector wire to the coil and it fired.
    I went from the resister tab to ground
    Got nothing.
    I am not real sure how to check the leaf switch other than ohms.
    I have been tracing wires and checking
    Connectors,fuses. I would appreciate any help on what to search for thanks

    #2 10 months 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

    #3 10 months ago

    Thanks robertmee,I’m glad you could
    figure out my frustrated post.I do have a diode test on my meter and the cpu is an 11b.I just recently ran the solenoid diagnostics and the rt jet bumper coil fired.I have checked continuity on most all wires from the bottom of the Playfield
    To the back box connectors.Is it likely a switch problem? Thanks again for you assistance!!

    #4 10 months 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.

    #5 10 months ago

    I will give that a try tomorrow.My neck can only take so much.I think we may be getting closer to solving this puzzle.
    Thank you!!

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