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  #1  
Old 05-13-2017, 09:18 PM
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Question Firepower by Williams...problem

when a quick combination of left/right flipper is triggered...the game ends. Doesn't tilt, game just ends.
Anyone come across this problem before? Any suggestions? thanks.
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Old 05-14-2017, 12:55 PM
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What exactly is game just ends?. Does it show game over?.does match number come up?. What all work has been to the machine? Has the 40 pin interconnector been changed? Has the 5v filter cap been changed?
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Old 05-14-2017, 01:18 PM
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More specifically - the machine goes to game over, all scores show zero, no match indicated, and machine goes into attract mode.

40 pin connector has not been replaced.

5v filter cap has not been replaced.

I assume your recommendation would be to start with replacing both of those?

Thanks!
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Old 05-14-2017, 05:07 PM
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Replacing the 40 pin interconnector is probably the first and best step to do on a Williams machine of that age because of all the data lines that go through it. Recapping or replacing all the electrolytic caps is important also for reliable operation because of their Life span. Also a good precautionary measure is to add an inline fuse to the input of both of the surface mounted bridge rectifiers. Without these fuses if short occurs on the bridge input, a short will show on the transformer secondary, and possibly damage the transformer before its primary fuse blows. I have already done a post on this.
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Old 05-15-2017, 11:45 AM
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Default Is this the right connector??

Thanks pinballdaveh...is this the 40 pin connector (the ribbon connector in roughly the 9 o'clock position)? Seems to be the only one in the back box.Click image for larger version

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Old 05-15-2017, 11:59 AM
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Nope I connector I'm talking about is the connector that joins the CPU board to the driver board. The female part of the connector on the driver board goes bad more often, but the male part of the connector on the CPU can pit or tarnish too and cause problems. so both male and female should be changed.
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Old 05-15-2017, 12:14 PM
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Default sorry for my ignorance on this...

I'm pretty good with EMs, but SS confuse me. I only have a Rottendog MPU board...take a look at this photo of the back box components...not sure what you are referring to when you describe "CPU board to driver board" connector. Is it somewhere on this photo?Click image for larger version

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Old 05-15-2017, 06:00 PM
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The original CPU and driver boards that had that 40 pin interconnector have been changed with a rottendog combo board. Check if rottendog has a tech support line for help. Maybe they have seen or heard of this problem before.
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Old 05-17-2017, 09:21 PM
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Monitoring the 5 and 12 volts from the power supply to the combo board are important. The combo board may have a watch dog circuit that looks for under voltage. Check and log voltages while playing and see if any changes happen.
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