It's a tricky circuit. To help narrow it down,
- does the extra 10 points happen occasionally for both of the 1-3-5 rollovers?
- does the extra 10 points happen occasionally for both of the 6-8-10 rollovers?
- does the S/Series relay fire 3 times when the rollovers correctly score 30 points?
- does the S/Series relay fire 4 times when the rollovers occasionally score 40 points?

/Mark

Ok gang 30 point scoring is achieved with a rotation of the score motor, contact 1A provides 5 pulse for a 120 degree rotation. We only need 3 out of the 5. B or C relays close with the rollovers and then cont 2C closes briefly during the rotation then 4B closes briefly then 1B closes briefly (all at different times in the 120 degree rotation. Central park didnt have a timing chart but here's one off of SkyJump. You can see how the three bottom positions on the timing chart would generate 30 points.

So with that said, why 40 points? My guess is one of your 3 contacts is gapped a little close and not opening quickly enough and occasionally scoring an extra 10.

Go inspect 2C 4B 1B (power off etc) and maybe buy a cir diagram.

IMG_032 (resized).jpgIMG_033 (resized).jpg

To find which one of the three contacts could be causing the issue... tape off 2 out of the three contacts and see is the occasional extra 10 goes away. How to find which contact in the stack? Look for the wire color codes either side of the contact...

Is that how you'd do it MikeO Team EM?

For the life of me I cannot find the "P" relay. I have a schematic but all my decals that show the letters on the relays are gone. Can anyone send a pic of the relay in question? I am stuck on 40 points 100% of the time

I have a CP you nut bar, just text me

Got the pic! Thanks honey