(Topic ID: 298711)

1976 Chicago Coin Cinema Same Player shoots again issue.

By CarlH

2 years ago



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  • 9 posts
  • 2 Pinsiders participating
  • Latest reply 2 years ago by CarlH
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Cinema High Score (resized).jpg

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#2 2 years ago

If you change the award level does the behavior change? If so chances are that the contacts on each player's score reels that indicate which digits are showing need to be cleaned.

If the award level doesn't affect the behavior it may be that the contacts on the Player Control Unit (in red) that advance as each player plays are only working for players 1 and 2.
Cinema High Score (resized).jpgCinema High Score (resized).jpg
You can jumper across the contacts on the Player Control Unit to test that theory. For example if you jumper the R-Y (red-yellow) and W-BLU (white-blue) wires together on the left side of the schematic, and the Y-W and Y-B wires together on the right side of the schematic you remove the Player Control Unit from the circuit for player 3. If doing that allows player 3 to get a high score replay you know the problem is with one of those two connections.

/Mark

#5 2 years ago

Suppose you were to jumper around different parts of the circuit? For example if you jumpered from the red-yellow wire (common to all four players) on the left side of the schematic above, to the yellow-black wire (also common to all four players) on the right side of the schematic you should get an extra ball any time the 1000-9000 relay fires for any player. If you jumper instead from red-yellow on the left to yellow-white on the right, you should get an extra ball any time the 1000-9000 relay fires and player 3 is up. Moving the jumpers around and observing what happens should offer clues to where the issue is.

#7 2 years ago

Your jumper tests tell you that the Player Control Unit connections on the right side of the schematic are working. Good. But why did you switch to continuity tests after that? Continuity by itself only tells you that the meter sees a path between the probes. In many cases you can't reliably know which path or paths the meter sees without a lot more circuit analysis. If you want to make measurements with the power off measure resistance, not continuity. (Much more elsewhere in the forum.)

I'd stick with the jumper tests. In fact stick with player 3 to start and gradually decrease the amount of circuit you bypass with the jumper to see if you can isolate what part of the circuit isn't working.

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