Black Knight sound board problem

harleymadman

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Oct 6, 2009
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Does anyone work on sound boards for the Williams system 7? I have a Williams Black Knight with no sound. I am also having a problem with the drop targets on the lower play field not scoring. Any help would be greatly appreciated. Thanks
 
maybe some help for you

hi does the board work in self test or when pushing sound board test switchs.First check for +12 vdc, -12 vdc and +5 volts on the sound board and speaker connections. There should be four test points.try turn volume up and down may be a dead spot on pot.there should be some static coing from board. If there is absolutely no sound, then the TDA2002 amplifier chip is probaly not working ,if all else fails. the coin op caudron will repair your board they do a great job http://webpages.charter.net/coinopcauldron/Index.html.as for your target could be a bad doide or wire connection,dirty or bad switch.well hope i helped p.s you can also go here for more info http://www.marvin3m.com/fix.htm
 
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