A few people have had some trough and plunger issues, here's some symptoms and things you can check:
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- auto plunger weak:
take off the glass and check the metal autoplunger forks aren't hitting the rubber tip of the manual plunger. The playfield can move left or right a bit to help clear it. I move mine over as far left as I can when I put the playfield back down. You can also loosen the screws that hold the manual plunger to the cabinet and can adjust and re-tighten as well, which is an even better solution.
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- ball locked in Judith Tombstone is released when new ball is being auto-plunged:
check all your trough switches carefully. When the new ball is being ejected it can cause the others to jiggle around. The code allows for this for a short time, but if any of your trough switches are sticking, it may seem like an extra ball is in the trough (i.e. what happens when you drain) and so it releases the ball. Make sure you test the switches with balls as well as just finger tests, also try moving the balls over the switches at different speeds. Don't forget that when a ball is locked, and the next one is ejected, there are only 5 balls in the trough at this stage, so test with this many balls as well as other configurations.
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- ball locked in Judith Tombstone, new ball auto-plunged and drains, locked ball not released:
check your trough, switches 6 and 7 especially. These are what tell the machine that you've drained and it should release the ball to continue play. Use the ball trough test and look through the coin door at the switches from underneath. If any of them are sticking (even just sometimes) they will cause this behaviour
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- when a ball is ejected to the shooter lane, it bounces back in:
reduce the TROUGH coil strength (just one level at a time and re-test) in the menu settings. This should never happen and will cause an extra ball to sit in the "trough jam" state above the first ball in the trough. This can then cause more problems when the next ball is ejected as it will be trying to eject two at once (only one makes it out - the other one goes back into the jam location and the cycle continues)
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- at ball start it doesn't successfully eject a ball until try 2 or 3:
use the TROUGH TEST to make sure there isn't a ball in TROUGH JAM (clear it if there is), increase the TROUGH coil strength (just one level at a time and re-test) so it is ejecting correctly
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- extra balls being ejected into the shooter lane:
** There is an issue in 1.11 where the code isn't waiting long enough for the ball to get to the shooter switch, so if the ball rattles a bit or takes slightly too long to get there, it is sending another one. That has been addressed and will be fixed in the next update **
But under normal circumstances this is likely an issue with your shooter lane switch. Again, use the TROUGH TEST and check the switch with your finger as well as with a ball and make sure it is always activated when a ball is ejected.