Grand Prix
Williams, 1976Grand Prix have problem score motor ? when i turn on power then the score motor runs all the time without being stopped before the start button. and after pressing start button get kick ball and start shooter no problem. problem is score engine runs all the time what wrong?
received_485428789109147 (resized).jpegQuoted from Jaffafu:problem is score engine runs all the time
Is it doing anything else, like scoring points?
Check out the start sequence.
Capture (resized).PNGCheck the schematic on ipdb.org. You'll see that the score motor is powered through any of quite a few switches. You need to see which one is closed when it should not be. Easiest way to do this is to block the switches one-by-one with a piece of cardboard until you find the problem switch.
Alternatively, when you start the machine up, see if any of the relays whose switches are inline with the score motor energize.
Quoted from currieddog:Is it doing anything else, like scoring points?
Check out the start sequence.
[quoted image]
I press start all scores are reset and the ball came out to the shooter. but score engine still runs all the time same before i start button. when i turn on power the engine runs all the time.
Find score motor run-on switch (usually either the top or bottom switch on the stack closest to the physical motor. Place a piece of paper between the contacts to see if the problem stops.
If that does not work, consult the schematic and inspect each and every switch shown that operates the score motor. One of them is stuck/adjusted to close or out of adjustment. Repair the problem switch.
Wanna join the discussion? Please sign in to reply to this topic.
Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!
This page was printed from https://pinside.com/pinball/forum/topic/em-score-motor and we tried optimising it for printing. Some page elements may have been deliberately hidden.
Scan the QR code on the left to jump to the URL this document was printed from.
Sykkylven
Springfield, MA
Ottawa, ON