(Topic ID: 258119)

Williams BSD sound up not working.. Am I missing something? - FIXED!

By Barakawins1

4 years ago



Topic Stats

  • 9 posts
  • 2 Pinsiders participating
  • Latest reply 4 years ago by RussMyers
  • Topic is favorited by 1 Pinsider

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#1 4 years ago

I'm working on a Williams Dracula. The volume up adjustment switch inside the coin door doesn't work. I changed the adjustment switch and same result.
I swapped the power wire from the down volume switch to make sure the new switch works and it does. I can confirm the new adjustment switch works.
Next, I followed the wiring up to the mpu board (J205), pin 8 (orange/violet) I get continuity from the coin door switch up to J205 pin 8 no problem. So have no wire breaks. Anyone have any other ideas on why this switch may not work?

#3 4 years ago

No acid damage at all

#5 4 years ago

Yes it’s attached.

#6 4 years ago

UGH! The schematics were wrong! Unreal! Compared traces with another board and confirmed schematic drawing was incorrect.

#8 4 years ago

Yes bad trace.

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