WPC Theory of Operation and Schematics Manual. 16-9289
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Original Williams WPC Theory of Operation and Schematics 16-9289 Manual. Oct 1991. If you own a late model Williams/Bally pinball machine and want an in-depth understanding of how it works, this 1991 Williams Tech Support document is for you. It contains Set-up, System Operation, Circuit Operation, and Troubleshooting info plus an additional 14 large circuit schematics. WPC games (WILLIAMS Pinball Controller) are listed on page 28 in the revisions chart.
Reference: 16-9289