(Topic ID: 245833)

Space Shuttle having issues

By Barkz

4 years ago

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Latest reply 4 years ago by frunch
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Space Shuttle Williams, 1984

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So my game has previously been locking a ball - and then not kicking out another ball to the shooter lane and it acts like the ball was drained and gives out the bonus and then goes to the next ball. Sometimes a ball drains and it sits as if the ball didn’t drain, or won’t eject a ball for a while and it occasionally won’t add a credit and start the game with the left button. I replaced the batteries and now it enters the bookkeeping mode where it displays the 2535-3 on the player 1 score rather than the 0 for the start of the game. Now when I get it to go back to display the high scores I can’t add a credit and start a game. Anyone have any ideas why and how to remedy any of these issues? Thanks!

Quoted from Completist:
My thoughts are if you replaced your batteries with the power off you lost your settings (why its booting into audit mode) and the game is no longer set to Free Play. Though i’m not sure if i’m understanding what you mean by adding a credit. Via coin switches or just hitting start button? The start button won’t add a credit, it starts a game if you have credits. Unless it is set to Free Play then you don’t need any credits.
But the first issue you mention sounds like a possible switch matrix issue. At least the way I interpreted it. Lock a ball, then game registers outhole switch. You can use switch edge test to see what the mpu is registering when you trigger that lock switch. If you see more than just the ball lock switch displayed, that is a problem. This is a quick, non-evasive test so if its not that you havent lost anything... lol
Now if you do see multiple switches recognized we can go down that path to resolve it.

Appreciate you taking the time. I’ll go back through and try to debug with these instructions and let you know what results we get!

Quoted from Completist:
My thoughts are if you replaced your batteries with the power off you lost your settings (why its booting into audit mode) and the game is no longer set to Free Play. Though i’m not sure if i’m understanding what you mean by adding a credit. Via coin switches or just hitting start button? The start button won’t add a credit, it starts a game if you have credits. Unless it is set to Free Play then you don’t need any credits.
But the first issue you mention sounds like a possible switch matrix issue. At least the way I interpreted it. Lock a ball, then game registers outhole switch. You can use switch edge test to see what the mpu is registering when you trigger that lock switch. If you see more than just the ball lock switch displayed, that is a problem. This is a quick, non-evasive test so if its not that you havent lost anything... lol
Now if you do see multiple switches recognized we can go down that path to resolve it.

Ok so function 18 is set to 0 so I’m thinking it should be on free play. I didn’t jump out of audit to test.

Switch test resulted in 11,12,20,36 which per this picture is middle ball ramp, lower ball ramp, T drop target, and ball shooter lane. I did this without starting a game or anything, ball in shooter lane.

I then locked both locks and got 16,20,24. Drained a ball and got 9.

Then I put one lock in and got 9,20,16,12. With two balls drained.

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Ok does anyone know where I can buy these or if it makes a difference if I have them or not? I think that’s the reason why my game keeps starting in bookkeeping mode (obviously I normally have the batteries in).

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