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Author Topic: FIX: Williams system 11 volume control won't turn all the down  (Read 763 times)

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Ken Layton

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FIX: Williams system 11 volume control won't turn all the down
« on: December 05, 2016, 11:55:47 pm »
On the Williams system 11 games, the factory installed a 47 ohm @ half watt resistor in series with the volume control's shield wire. This prevents the volume level from going below a certain point (usually it's still too loud). The cure is to remove and bypass that resistor which is located right next the volume control next to the tilt bob. The shield wire will connect right to the bottom terminal of the pot where the resistor was located.

This will restore the full range of volume control so you can even turn it all the way off if desired.

ChadTower

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Re: FIX: Williams system 11 volume control won't turn all the down
« Reply #1 on: December 19, 2016, 02:14:14 pm »



Awesome, good info Ken!  Thanks.

Ken Layton

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Re: FIX: Williams system 11 volume control won't turn all the down
« Reply #2 on: December 19, 2016, 02:21:13 pm »
In some game manuals/schematics this resistor is not even mentioned. I had to hunt through several manuals to find it. It was in the Elvira cabinet wiring diagram.

  
 

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