I am having trouble with the bonus tabulating properly and also with bonus redemption. Also, on ball five the bonus isn’t able to complete redemption before Game Over. Acts the same for both players. Here is a video example. I really struggle reading Bally diagrams. Specifically tracking down the contacts being used by a specific relay. I really appriciate the detail I have found in Gottlieb drawings.

bad68f9d990620b20b27b7579db92676cb71d67e.pdf

What I did find on the Yellow Bonus Step Up Unit was a continuously open end of stroke contact referred on the print at Print Location 5J as Yellow Bonus Unit Zero (NO).

As a result, when the Yellow Bonus Unit Stepper Solenoid advances, the now repaired Yellow Bonus Yellow Bonus Unit Zero contact is then allowed to close.

However now the Yellow Bonus Unit Reset Solenoid (Print Location F35) immediately energizes preventing the Yellow Bonus Unit Stepper Solenoid to advance the bonus as the wiper is returned to the zero position and Yellow Bonus Unit Zero contact is back to a normally open state. See video.

At this point I checked all the contacts in the Yellow Bonus Unit Reset Solenoid circuit (Print Location F35). The are all as shown on the print. All normally open. As far as what is happening when the Score Motor is running I have run it slowly by hand. As far as I can tell the Score Motor Contacts in the Yellow Bonus Unit Reset Solenoid circuit operate as they should. I am having trouble figuring out this one. I look forward to your input. 20191024_200325 (resized).jpg

I'll stop at UPS store in the morning.

Lightened.pdf

Try this link while it is still active. https://www.dropbox.com/s/0rl5ffmtyfqm2df/Image_20191026_0003_cropped.pdf?dl=0

The preview image is blurry but when download its crisp.

Yes both Yellow 1st Player and Green 2nd player bonus have the same problem. Both Yellow Bonus relay and Yellow Bonus Zero relay actuate and the score motor runs. The car lamp indicators progress as well around the track. The number of spaces moved is determined by the condition (lit of not or color) of the bonus taget. 1, 3, or 5 spaces. I can shoot a short video of this if that would help.

So here is what I observed. It seems pretty much instantaneous so the relay follows the switch very closely. Call me a skeptic but just for the heck of it I isolate the switch and as you would expect nothing happened.

While looking at the Yellow Bonus Reset Solenoid circuit (see below) trying to figure out what is making this come on before it should, I was able to account for the the two Score Motor switches. They were N.O.open and the Score Motor runs for most every thing you do so I knew it had to be able to run without the Yellow Bonus Reset Solenoid energizing.

This left the Reset Relays and Yellow/Green Bonus Relays. The only thing resetting was the bonus not the whole machine so that was out.

My focus went to the Yellow/Green Bonus Relays (see below). The Yellow Bonus Zero Relay contact had to be energized that was a given because as the bonus accumulated on the Yellow Bonus Unit the Yellow Bonus Unit Zero contact would close completing the circuit for the The Yellow Bonus Zero Relay.

Three left.
1 Yellow Bonus Relay, to me this was a no only because I went over those contacts and I never saw the relay hang up. so fore the moment I would move on.
2 Yellow Hole relay. If this was closed for some reason the yellow hole eject would be going off.
3 Left or Right Out Roll Over switch. They are so flush to the underside of the play field its difficult to see which state there in. I checked the right side first and checked for continuity. Sure enough there was a clear ring from my MM.

Thank you all for your help. This problem presented itself in a way that I couldn't get my head around. Your ideas and questions pulled me back into frame so I could finally see through the forest.

The Final Problem 1 (resized).jpg

last problem right out roll over (resized).jpg