(Topic ID: 96284)

DM ball trough issue

By Turkey_Robinson

9 years ago



Topic Stats

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#1 9 years ago

It's just recently started shooting out additional balls during gameplay. I've read over a few posts about this. I'm not getting any response from any of the ball trough optos. Someone said you can use a flashlight to possibly trigger the phototransistors but that's not having any effect either. F115 and F116 are good. How do I check if the individual LED's are working? It would be nice to have a phone or camera with night vision on it I've tried testing the individual wires coming from the board for 12V output but the test points on my DMM aren't small enough to fit inside the wire harnesses. help!

#2 9 years ago

If the red led is on then you have 12v .
To test the sender leds remove the board connector on and use your cellphone cam to test them .
Check the blue resistors for breaks .

1 week later
#3 9 years ago

Update: So the LED side of the trough board wasn't getting power so I resoldered a few connections and it's now back up. The main problem is back though that it's still spitting out a few extra balls from time to time. After playing around with the glass off for a while I believe I've located the problem. I want to run it by ya'll and see what you think. From what I can tell, the ball release coil doesn't always fire hard enough to get the balls out of the trough and up to the shooter lane. I'm assuming this is throwing everything off and is the reason the extra balls get fed into play. Does that sound plausible? New coil?

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