(Topic ID: 262087)

Grand Prix Troubleshooting

By Toyguy

5 months ago

Topic Stats

  • 3 posts
  • 3 Pinsiders participating
  • Latest reply 5 months ago by HowardR
  • Topic is favorited by 1 Pinsider


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#1 5 months ago

Wondering if anyone may have some ideas or may have seen this issue.

Start a 1 player game, everything resets and ball kicks out as normal, scores and bonus all work fine until the ball drains. Instead of moving to ball 2, it jumps to Player 2, Ball 1 even though you have started a 1 player game and the 1 Can Play light is on. Drain that ball, and it moves to Player 3, Ball 1 and then to Player 4, Ball 1. After draining that ball, the game will remain forever on Player 4, Ball 1.

I thought this looked pretty simple from the schematic, but no luck fixing it yet. Any thoughts or suggestions?


#2 5 months ago

Does the problem still happen if say, you only have 1 credit on the counter showing? Presumably, it will zero once you press start. If it does and then it continues to gives the symptom you describe, I'd look at the player unit to start with.

#3 5 months ago

If the Ball Count Unit Stepup solenoid doesn't activate when this happens, Inspect and diagnose this circuit with Alligator clip jumper wires,
Starting with the Motor 1C switch and the Coin Unit wiper disc

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