Hi,

I am facing a problem with the 1L coil which locks out the balls one by one from the through to the vertical eject coil.

When the machine is switched on, the lockout coil is activated a few times. Which is not normal. As a consequence, 2 or 3 balls are ejected and launched to the playfield without reason. Also, at machine switching, it says "pinball missing" or "6 ball missing" or "4 ball missing". The thing is that the unlocking coil let the balls go to the release coil (kind of VUK) which sends ball to the shooter lane.

So I wonder if because the CPU thinks not all the balls are in the through, the timeout lockout mechanism tries to activate all coils to release them, or if the 1L coil is the primary cause and by itself releases balls unexpectedly for some reasons.

I checked Q54 which is the switch driver for the through switches column. On the DMM, I get normal diode values.

Any help is appreciated. Thank you

I guess no one can help on this.

Can I just ask a DE owner, to remove all he balls from the through, remove the apron (very easy) and switch on the pin. Does the coil on the playfield "pumps", attracts the plunger a few times or stays idle ?

That will help me finding whether the coil or the ball switches is responsible for the malfunction.

Thanks again

Hi
I made it, for each ball

1,2,3,4,5,6
1,2,3,4,5
1,2,3,4

And so on
Thanks wayout

The switch test, either by manually lifting each ball with the finger, or filling the empty through with the balls one by one is successful.

Thank you very much, when you had only 3 balls in, did the lockout activate as it was tbe case when no ball at all was in the through ?

I have not found the issue. As I was helping a friend and nothing comes up from his side, I close the subject. I will give the solution if further progress is made. Thanks to all