(Topic ID: 73066)

Funhouse audio board, system 11 vs. WPC A-12738

By BestShot31

10 years ago


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  • 14 posts
  • 8 Pinsiders participating
  • Latest reply 3 years ago by Gaston
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#6 10 years ago

http://mirror2.ipdb.org/files/966/Williams_1990_Funhouse_Prototype_Manual_Addendum.pdf

This indicates the sound board, sound roms and transformers are not compatible.

WPC-89 sound is run off of 18 volts.

I can't tell from the IPDB schematic, but sys11 sound boards operate off of +12, +5 and -12. If the 18 volt transformer is used on a 12 volt sound board, damage usually occurs. If the 12 volt xformer is used to operate the 18 volt sound board, it probably won't work.

#8 10 years ago

I had a set of those schematics at one time, when I had a sample FH. I included them when I sold the game, so I don't have a copy to reference.

I do have an extra A-13502 board in a box of parts that I acquired along the line.

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