Playmatic's Strange Reset Sequence On Their E.M. Pinball Schematics – New World Repair 3

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7 thoughts on “Playmatic's Strange Reset Sequence On Their E.M. Pinball Schematics – New World Repair 3”

  4. Those schematics seem quite confusing to someone who's not familiar with them. The logic is simple enough, I guess, but there are so many places to look, and there are so many components. Fascinating machines, but a bit of a nightmare to service considering how sensitive the parts are.

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  5. Hi Ron!
    Point of curiosity –
    As a troubleshooting practice, it seems to me that the process of elimination can be beneficial when trying to isolate a problem.
    Now, in this instance, you still are going to go through the entire machine, cleaning all the relays, and such, but you also want to find whatever is causing the score motor to run.
    The playfield was removed, and the score motor still runs, so it's not anything on the playfield. (Or so we thought… Cue spooky music…)
    You cleaned the mech board, so it's not that.
    You disconnected the head, and the problem went away… Progress! (Or is it? More spooky music…)
    Now, my question is this; There are three Jones plugs connecting the head to the mech board. If you had connected the Jones plugs one at a time, and powered up the machine, could that have narrowed down the section that was causing the score motor to run?
    (Of course, in this instance, it turned out to be more complicated than that, but generally speaking, is my logic flawed?)

    Also… I find it interesting that this machine features not one, but two 'dummy' score reels. This helps advance my theory of 'pinball point inflation' (The phenomenon that seems to cause pinball point values to increase over time from machine, to machine… Score reels aren't cheap… Segmented displays are cheaper… DMDs/LCDs are cheaper still)

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  6. Hey Ron. Great video. Trouble shooting this machine can be a night mare, if you don't think it out. Your able to go throu the schematics and follow the path that controls what happens. Can't wait for your next video.
    What to see this running with no problems.

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