Jurassic Park question

KingOfTron

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The vertical up kicker that kicks the ball from the trough into plunger/gun lane has been kicking every few seconds during game play. It doesn't really affect game play since it's under the table and it never kicks another ball onto the playfield, but it's annoying as hell to hear it constantly. Has anyone ever come across this? Any ideas on how to get it to stop? It always works when it should, but just kinda keeps kicking needlessly. Thanks!
 
The vertical up kicker that kicks the ball from the trough into plunger/gun lane has been kicking every few seconds during game play. It doesn't really affect game play since it's under the table and it never kicks another ball onto the playfield, but it's annoying as hell to hear it constantly. Has anyone ever come across this? Any ideas on how to get it to stop? It always works when it should, but just kinda keeps kicking needlessly. Thanks!

I would suspect that one of the trough microswitches is sticking closed, or has a bad or intermittent connection at one of the wires or diode.

It's also possible that the transistor on the driver board that controls that solenoid is flaky and is intermittently grounding out. I'd take a hard look at the trough and shooter lane switches first though.

RussMyers
 
Had that problem too, quite annoying.

There is a microswitch on that VUK off to the right side, behind the plate so that you cannot see it when the coin door is open, only when you lift the playfield and look at the trough from the shooter lane end of things (make sense?) That switch is probably out of adjustment or stuck on. You can check that in the switch matrix test part of the diagnostics. I believe that my issue was that the diode on the switch had fallen out of the crimp connector and was shorting to the frame, causing the switch to be active intermittently.

Mike
 
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Had that problem too, quite annoying.

There is a microswitch on that VUK off to the right side, behind the plate so that you cannot see it when the coin door is open, only when you lift the playfield and look at the trough from the shooter lane end of things (make sense?) That switch is probably out of adjustment or stuck on. You can check that in the switch matrix test part of the diagnostics. I believe that my issue was that the diode on the switch had fallen out of the crimp connector and was shorting to the frame, causing the switch to be active intermittently.

Mike

This was exactly my problem. The diode had been pinched when lifting and lowering the playfield over time and it eventually broke free. I soldered a new one on and it was 100%.
 
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