I have a small problem with my 1975 Bally Bow and Arrow. When playing on 4th player, the 100,000 point light comes on after 10,000 points. I checked the 100,000 point interlock relay and it is kicking on after every 10,000 points. So it comes on after 10,000. If I manually disconnect the interlock, it will kick on again at 20,000 and so on. Anyone have any idea why this would happen? It only happens with player 4.

The schematic is available here http://mirror2.ipdb.org/files/362/Bally_1975_Bow_and_Arrow_Schematic_Diagram_continuous.pdf

I found 4th player 100,000 parts at B7, E15, and D40.

Thanks, Greg

PS - I just read that on Bally machines "the coin relay, through the score motor, will energize the 100,000 relay latch coils" if that helps.

That was it! A little adjustment of the switch and it's all fixed. Thanks so much Pin-it.