I got a really good deal on a non working Top Card pinball. The back glass and the playing field is in good condition. First it would not even come on but after a lot of tinkering with it, now it works great. I have one problem with the scoring. If you set the game to 3 ball play it scores correctly. If you set the game to 5 ball play it scores 3500 every time you hit a target. The instructions says it is suppose to score 500 every time you hit the target. I am unable to figure out how to adjust the score. I don't think there is an adjuster pin to move to make it score correct. I bought a schematic for the game and I just can't figure it out. Could someone please help me understand what is going on. The other thing I don't understand is a random number comes up on the back board after a completed game. Is this a match number to the score to get an extra credit? The instructions do not say anything about it. Thanks

I can not find a radio plug under the play field. I am thinking a relay is causing the score to be off.