Likely typical maladjusted 0 position switches. Just clean and adjust, so that zero position is closed when on zero.
Sand paper, 400-600 grit, or emery board, or even an old school card stock business card. There is plenty
of this on CH's site, and on the web. USENET has a ton about this on the RGP group.
Definitely a fun game with the end of bonus ball feature, as well as collect bonus in play. Not a great game,
but a solid good game with backglass animation, lame artwork, and a good playfield layout with twin spinners.
Over all a 7.3-7.5 in my book, and good enough to get 200-300 when whoomped up and sold to unsuspecting noobs.

I'm a proponent of breaking down the entire game upon receiving it, cleaning and adjusting everything
and moving forward to fixing issues if I missed them. However as a noob, that is not advised by many. I disagree.
You will learn much more by taking the ENTIRE game apart, documenting, and then putting it back together.
This is also true in life itself. I hope that helps. Nice game/title/make/model/play.

These 16 Reset switches prevent the game from completing reset until the score reels are all on zero.

Pinball (resized).png

Make sure the disc and wipers on the Player unit in the head are squeaky clean, polished and lubed, and good wire connections to the ends of the wiper fingers. My Fast Draw started doing stuff like this (not resetting players all the way, incorrect stepping between players, randomly) because I had let the disc get dry and dirty. The game could potentially go all the way to ball serve without resetting any reels at all if some of those fingers don't make contact.

The switches on the Z1 and Z2 relays should open during startup, which will prevent the Player unit from advancing. Here's the relevant page from the Super Soccer manual.

Pinball (resized).png

Glad I could help and thanks for upvoting my post

What was the issue with the Z1 relay that fixed it?

So you're calling it a 2-300 dollar game? (To noobs)
Have to disagree there.
I have a dialed in Soccer, it earns 150-200$/month in a brewery, and I could easily sell it for $500, to people that know plenty about pinball.

Ah ok, sounds like it was probably the lock-in switches in both Z1 and Z2. Success!

I remember hauling three EMs home in my pickup for 50 bucks each, usual was about 50 or 1 or 2 hundred. I'm sure they would all be valued at 500-1000+ now if I still had 'em. The good news is that then I was young and broke but now I'm 35 years older and have dough to pay that much for them. The bad news is that because I'm old I have 'inflation-itis' and think 1000 is still as much money as it was in the early 80s and that Hershey bars should still be a quarter.