(Topic ID: 195788)

Williams System 11A Bowler(Tic Tac Strike) Sound Hum-SOLVED!


By vdojaq

2 years ago



Topic Stats

  • 5 posts
  • 2 Pinsiders participating
  • Latest reply 2 years ago by vdojaq
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    #1 2 years ago

    I have looked through several threads here on this issue to see if I can at least suppress this obnoxious sound hum in attract mode. The hum is commensurate with the attract mode lights, the more the lights, the louder the hum. It's loud.

    This machine uses no separate sound board, it is all run through the 11a MPU, so the sound section is populated. I have tried the cleaning of the mounts for the MPU and making sure each screw is there and tight.

    Anymore ideas?

    #2 2 years ago

    Hi,

    The JokerZ is also a sys11A

    Have a look to this thread I initiated. Unfortunately, I have not had the time to make anything on my pin.

    https://pinside.com/pinball/forum/topic/problem-jokerz-hum-in-speakers

    #3 2 years ago

    No, that's an 11b with a sound card, but thanks.

    #4 2 years ago

    Sorry, wanted to help

    1 week later
    #5 2 years ago

    After going round & round with this damn sound issue I finally got it solved . Not only was this thing humming loudly with the attract lights, but also found the sound would not go low either. I would turn the sound potentiometer all the way down , but this thing would stay loud. If I unplugged the connector for the volume, it would go quiet and the humming would go way down, so it's got to be a bad potentiometer right? Ran off to Pinball Life and got a new 10K volume potentiometer. Installed it and NO change. WTF???? Clay has written quite a bit on this issue on system 11 A's sound, so I decided to fire an email off to him. As I was writing and describing my issues it dawned on me that it had to be in the volume control circuit. I almost ran back to the machine and decided to pull each of the 3 pins in the molex connector and there it was, a cracked connector pin. I re-pinned all three wires and like magic, the hum was gone and my volume control is perfect!

    How many times must the obvious be overlooked.....re-pinning connectors!

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