(Topic ID: 274602)

WPC89 MPU and Power Driver Boards Bare PCB's

By heydudetyler

3 years ago



Topic Stats

  • 3 posts
  • 3 Pinsiders participating
  • Latest reply 3 years ago by DumbAss
  • No one calls this topic a favorite

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#1 3 years ago

Hello,

Looking for NOS WPC89 MPU and Power Driver boards. No remakes. Looking for original clean PCB's. Would any of you restore junkies know where to find these artifacts?

Thanks!

For TAF, WH2O

#2 3 years ago

On rare occasions, unpopulated driver board PCBs sometimes pop up on ebay.

Aftermarket PCBs for MPUs have surfaced before on ebay as well.

#3 3 years ago
Quoted from heydudetyler:

Looking for NOS WPC89 MPU and Power Driver boards. No remakes. Looking for original clean PCB's.

Mr. Pinball has the CPU board. It's "5764-12431-05". I don't think Williams ever used this revision so I believe this is a modified reprint of the original print / layout.

ebay.com link: Williams Bally WPC CPU Pinball Board Bare Board

He used to have the power board a year or so ago but I haven't seen them come back.

I do have reproduction blank (bare) boards that are based 90%-95%+ on the original Williams circuitry and layout. They are not modified prints of the original layout. For example ... the power board has a modification from bridge rectifiers to discrete diodes and allows a daughter board to select your desired +5V regulator (or you can use the onboard default) - typically a switching regulator rather than a linear regulator. I have a thread with more information that you should be able to find if you are interested.

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