Sankyo First timer !! Help please !!

[spiwrx]

OK, I assumed something was missing, and it is, but nothing from keeping me playing then. My problem may be just an adjustment then. I was playing around with the adjustment on this trap door thing I've pointed to in the picture (Red Arrow).

The problem is, I will get a reward sometimes but after the first payout 1 or 2 the balls get stuck not clearing this trap door, if there is more than 1 ball in there, on the lever arm(Green Arrow), it gets backed up and nothing clears the trap door. I'm assuming this long lever(Green Arrow) that resets it is not supposed to back up with multiple balls?

If I understand the mechanism, a ball landing on this longer arm will reward a payout, when the payout drops it hits the upper lever(blue arrow) and resets the see-saw thingy also releasing the ball that started the payout on the long lever through the trap door?

If I'm correct I think I just need to open the trap door a little more to get a more consistent release. Currently I get backed up on that long lever arm with multiple balls and then it jams and I have to take it apart to clear it. I don't think there is supposed to ever be more than one ball on the long lower lever.

And what it that spring loaded plunger under the see saw for? Obviously this resets the see-saw but why is it necessary?
Sankyo-Back4.jpg

If any of you have leads I'd like to find the original ball supply bin and replace the broken low ball lever and switch...

[Tink]

OK, I assumed something was missing, and it is, but nothing from keeping me playing then. My problem may be just an adjustment then. I was playing around with the adjustment on this trap door thing I've pointed to in the picture (Red Arrow).

The problem is, I will get a reward sometimes but after the first payout 1 or 2 the balls get stuck not clearing this trap door, if there is more than 1 ball in there, on the lever arm(Green Arrow), it gets backed up and nothing clears the trap door. I'm assuming this long lever(Green Arrow) that resets it is not supposed to back up with multiple balls?

If I understand the mechanism, a ball landing on this longer arm will reward a payout, when the payout drops it hits the upper lever(blue arrow) and resets the see-saw thingy also releasing the ball that started the payout on the long lever through the trap door?

If I'm correct I think I just need to open the trap door a little more to get a more consistent release. Currently I get backed up on that long lever arm with multiple balls and then it jams and I have to take it apart to clear it. I don't think there is supposed to ever be more than one ball on the long lower lever.

And what it that spring loaded plunger under the see saw for? Obviously this resets the see-saw but why is it necessary?
Sankyo-Back4.jpg

If any of you have leads I'd like to find the original ball supply bin and replace the broken low ball lever and switch...

Any winning ball on the playfield is fed to the seesaw, from the seesaw it passes down to ( what I call) the spoon (green arrow), which in turn releases the payout. The payout balls will fall onto the payout ramp ( blue arrow) which should lift the (what I call) the paperclip (red arrow) releasing the winning ball from the spoon.

There should never be more than 1 winning ball on the spoon. Most often this issue is due to sticky or dirty pivot points. the pivot on the payout ramp may be sticky and not be dropping completely thus blocking the lift of the paperclip. Sometimes a slight bend in that rod will fix the issue, but not normally required after cleaning.