Hi guys, I'm close to the finish-line with the second King Pin (the one with the weird Canadian kill-switch I posted about a few weeks ago) I bought back in May, which I'm going to sell. It starts up normally and kicks out the ball, and will go through Balls 1-5 to Game Over normally. That was a big relief, since I hadn't powered it up since bringing it home.
As far as I can tell there are 3 primary issues remaining, and we'll take them one at a time, but I list them all here together in case they're related.
1. The drop-target bank -- when it resets -- doesn't ALWAYS reset all the targets. In other words, they reset but occasionally some of them (maybe half?) fall back down under the playfield. Sometimes it resets just fine. But about half the time some of the targets don't stay "up". What are the main causes of this I need to be looking at? (Note: Not sure if relevant, but earlier yesterday they weren't working at all and I noticed that the white wire had come unsoldered from the transformer. I resoldered it and the reset began working as described above).
2. Sometimes when scoring -- and often this happens with the drop targets, but not always (sometimes it will happen with some of the playfield switches) -- I'll get hundreds and thousands scoring when only hundreds should be scoring. Seems like occasionally a random 10-point score will happen as well maybe when hundreds are scoring. So it's like a path is being opened to other scoring relays/chimes when it shouldn't be, but only occasionally.
3. This may be related to #2 above, but I think my score reels still need some adjusting because I notice that things happen such as when the hundreds reel moves the thousands might move with it. Do the score reel switches (9s?) cause not only the reel next to it to move at times, but could that also cause #2 above (and actually activate the chimes too?)?
Ok, let's start with #1 above -- drop-target bank not always resetting please. Would greatly appreciate your help.
*** NOTE: If you need a high-res scan of my schematic, I can provide one, but will need to run to Kinko's tomorrow. ***