My JY spits out the balls over & over again upon boot up.
I have remove the trough & wiped the optos & IR's. I then reconnected the tough & correct cables. Balls were still spitting out. Having then done a number of searches within the forum I spotted a thread that mentioned the divots on the trough.
Optos & IR's pass the switch test when i break the beam be it with a tooth brush or lowing the balls in. All optos/ir register 4..3...2...1
With the trough now removed & some sand paper I'm about to take the divets down to as smooth as possible..Here goes.