(Topic ID: 133305)

Williams MPU put in backwards


By 04barb

3 years ago



Topic Stats

  • 6 posts
  • 4 Pinsiders participating
  • Latest reply 3 years ago by Hawk007
  • No one calls this topic a favorite

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    #1 3 years ago

    I'm restoring a Williams Aristocrat shuffle alley and needed to replaced the 40 pin MPU MC 6800 socket. I thought that I marked it but I didn't and I put it in backwards. It should have been facing down. What do you suppose is blown besides the MPU? Can I use the MPU of a Bally, that has a MPU 6800 IC?

    #2 3 years ago

    If you spun it around and its still dead it should just be the cpu chip. System 3 is a 6800 cpu. Make sure to put the same creature back in there and mark pin 1 on the board for future reference as noted below.

    #3 3 years ago

    Thanks, I was hoping it would be only the chip.

    #4 3 years ago

    System 3 and 4 use 6800 cpu. System 6 -11 use 6808/6802

    Putting the CPU in upside down may ruin the CPU, but the rest of the board will be fine.

    #5 3 years ago

    And please please use a dot of white fingernail polish or some other way to mark the board where that NEW virtual notch is.

    #6 3 years ago

    6800.....oh yea thats right.... lol Should have known that. It was a looooong day yesterday.... Post edited...

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