Hey Guys,
Been restoring a Gottlieb KingPin for a few months now and I have one last problem that keeps cropping up every now and then. Hoping someone may be able to help.
Every now and then after all 10 drop targets are downed the first time and you get the 5000 pt special lit, it will randomly go away.. It doesn't happen all the time but probably 50% of the time is my estamite. So let me clarify a bit.. When all the drop targets are downed, the 5000 pt sequence completed (G) relay will energize, and while any ball is in play, the G relay will de-energize for unknown reason. It seems very random and does not follow any sort of pattern and does not happen all the time..
Looking at the schematic, I see that contact 5a green and white wire is used to hold the relay closed. I have cleaned and adjusted this contact and it seems to be OK. For troubleshooting purposes, I am able to stick a piece of a piece of paper between this contact and get the relay to de-energize. I have also not noticed anywhere on the schematic that anything is able to reset this relay once it is activated, with the exception of the reset function, but the machine is not resetting itself and no other anomalies happen.. The Relay just randomly drops out..
I am not sure where to look next.. I did a search on google and I came up with someone who was having this issue years ago with the same machine, but his issue was related to the stepper unit on the ball count resetting, so it only happened to him when the ball would drain and the next ball would be put in play. My issue is random and happens while the same ball or any other ball is in play. any thoughts on where to look would be great!
Thank You