What DaMoib said. Also, clean and adjust the motor 2C switch with the large contact points. That switch needs to close and make good solid contact in order for the drop target reset coils to have a good solid kick.

- TimMe

Here's another suggestion. I'm not sure if it applies to your game (I don't have a schematic) but I've seen this on some games, so it's something you may want to check.

On some GTB games, the scoring switches on each of the drop targets need to have a pretty big gap or you can get a faulty target reset. What happens is that as the reset bar starts to raise the targets, the scoring finger of a target closes its scoring switch immediately, which actuates the relevant score relay (say, 500 points) and that scoring relay has a switch on it that disables the bank reset, which in your case I imagine would cause the P relay to drop out immediately, thus cutting off the reset pulse too soon.

If you are having this issue, you'll see the P relay drop out very early as the target bank starts to reset. The P relay should stay pulled in for most of the motor cycle. There may be some other problem causing the P relay to drop out early, other than the drop-target scoring being triggered on reset, but if you watch the P relay and it is dropping out too early, then at least you'll know to look for what is causing that problem.

- TimMe

Thanks for the schematic snippet @DaMoib! You are right, the P relay has a straight-forward circuit on this game, so my suggestion in post #6 would not apply here.

In addition to what you pointed out about the sequence bank reset, if the P relay lock-in was failing and the P relay was dropping out too early, you'd also be seeing an issue with the player unit not advancing properly to the next player/ball in play.

- TimMe