(Topic ID: 304378)

BLACKOUT > No Sound for Drop Targets (Williams System 6)

By SpaceTimeGuy

8 months ago

Topic Stats

  • 3 posts
  • 3 Pinsiders participating
  • Latest reply 8 months ago by oldschoolbob
  • Topic is favorited by 4 Pinsiders


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#1 8 months ago

Hi ... Having a problem with my BLACKOUT by Williams ... Didn't have any sound but got most sound going now (think it was a combination of a dirty DIP switch on Sound Board and a "loose" wire connector) ... All sounds working now except the when the Drop Targets go down > then don't make any sounds. I have the schematic but am not smart enough to figure out which wires to the sound board would control this (guessing same ones that carry signal for other sounds???) ... or which ROM chip is responsible for the Drop Target sounds. Don't want to "fiddle" with just anything and take a chance on making things worse ... Thank You for any help !

#2 8 months ago

The drop targets are not connected directly to the sound board.

The drop targets have switches in the switch matrix that tell the CPU when a target is hit and when they are all down. They use a horseshoe shaped contact on the back of each target to make and break these switches. They are hard to get adjusted and working consistently.

The problem is that the “hit” is triggered in the middle as the target is dropping. If the contact isn’t adjusted and cleaned properly, this closure can be missed.

Check that the targets are scoring as each is dropped. If they aren’t, the contact cleaning and adjustment is your solution.

#3 8 months ago
Quoted from Schwaggs:

If they aren’t, the contact cleaning and adjustment is your solution.

Try these - no cleaning or adjusting necessary - ever. Easy to install.

[email protected]

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