Quoted from monkfe:
Ok I got ya on the lock switches, I'm guessing the spinner may be teetering and making momentary contact when you adding the balls...easy enough to test by spinning the spinner...So back to the jamb switch...using your phone camera- while viewing through the phone, you'll see the the lit leds in the trough...thats an easy check to see if they are all on....have you looked at the connectors on the trough board? make sure they're all good...ultimatly this sounds like a switch issue...but opto switch issues are always more difficult to diagnose due to the opto board they pass through...pinwiki is a great resource for this...
Update: It's basically impossible to see the Trough Jam LED with a camera because of where it's positioned. But I can see the other Trough1-4 LEDs shining with my iPhone front facing camera.
And here's much more important info:
First I want to make sure I use the correct terminology. A "dot" in the T1 test matrix indicates an "open" circuit, and an empty square indicates a "closed" circuit. The Trough1-4 and Trough Jam switches are "closed", or a square, when they are not blocked by a ball. When the ball is in place, they are "open", or a dot.
I can load the balls in the main trough and see each Trough1-4 switch open. I can take a pencil and put it in front of the Trough Jam LED and it will show it activating (opening the circuit, changing from a square to a dot) on the Switch Edge test (T1).
So, I can load all 4 balls in the main trough and each of the Trough1-4 switches will open (turn from squares to dots), and then I can put a pencil where the Trough Jam LED is, and it will also activate and show as open (turn from square to dot) in the T1 test. So now I'm wondering if we've misunderstood each other earlier? Am I describing what would be normal operation based on what you see on your machine?
If so, it doesn't seem like this would be related to my original problem.
Also, could I ask you to run T1 while you put 3 balls consecutively into the lock lane, and tell me what you see reported on the test?