(Topic ID: 46173)

STTNG: Auto launch always puts 2 balls into play after Final Frontier

By tsool

10 years ago


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#1 10 years ago

Hi all,

the caption basically says it all. The machine works perfectly, but if I lose the ball after Final Frontier the auto launcher always puts two balls into play. It never happens before that.

Whenever I reach Final Frontier and the last ball is lost, the trough pushes ball number one no launch, then second ball gets into position behind the first ball and then the auto launch fires. At that point the first ball sometimes does not get the necessary force to go over the ramp into play. Auto launch is repeated until both balls are in play. The downside: as soon as I lose one of the balls, the game is over for the machine (which is correct), but yet again, two balls are launched. So for me, the game is basically over after Final Frontier. I have no idea how to debug this, because as soon as the game restart is normal until Final Frontier starts.

Does any long-time TNG owner have an idea?

Thanks!

#5 10 years ago

Thanks, all. Will try my best!

#6 10 years ago

I checked. It is TROUGH RL 5 that does not show up in the switch test if there are 5 balls in the trough. Basically, if I do a switch test all switches show up, most of them very quickly, but the last one is always yielding the number of balls in the trough.

E.g. 1 ball, switch test shows TROUGH RL 1, 2 balls TROUGH RL 2... 6 balls TROUGH RL 6, but it never shows TROUGH RL 5.

Now I need to understand how the switches work in order to decide if something is broken or not. Does it work like a sensor barrier that the beam is cut when the switch is "on"?

#10 10 years ago

Is there anywhere where I can read up how to use my multimeter? I have a basic knowledge of electrical engineering, but I do not know how to measure resistors and what is to be expected.

Furthermore, I read a couple of threads that say to use cellphone or digital camera. I have also no idea how to test and what to test with that I understand that I can move something between the beam to see that it works, but why would I use my cell phone?!

Do I need to order two new trough boards if I cannot fix it myself?

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