i just spent some time rebuilding the horse unit that races across the back box of my 1967 williams derby day...they all work splendidly, but sadly they do the same thing as before i rebuilt it: once every few games some of the horses will not go back all the way to start....its random horses at random times, never anything standard like "#3 never makes it". if i turn off the power and reset the game after they dont all completely reset, every horse goes back to start like they should. ive got the instruction book and various other original resources, and i feel like ive narrowed it down to the score reset relay, which is apparently controlled by the impulse cam on the score motor. unfortunately, my documentation seems to skip right over the exact function of each of the reels on the score motor, so i basically have no idea which one is the impulse cam. any pointers? ive got the whole instruction book and other things scanned into my computer, so if you need or want i can post the whole shebang for your viewing pleasure. everything else in the game seems to operate as designed....or if it doesnt, i have already figured out why and they dont seem related to the horse problem. namely, the replay unit wont cycle down due to a worn armature, but its in novelty mode so it shouldnt matter. i think.
any help is greatly appreciated, thanks!