(Topic ID: 115964)

Row and Column question

By Farmboss

9 years ago



Topic Stats

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

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#1 9 years ago

My Black Knight won't start a game. I am pretty sure it is because the ball trough switches are not registering. Testing diognostics on the switches revealed that none of the ball trough switches work. But I am getting multiple identifier codes on most of the switches. My understanding is if this occurs on all switches in a row then there is a short in one of the columns. However I am getting errors on every row. Would there still be the possibility of a short or should I be looking at the transistors in the mpu?

#4 9 years ago

Great info thanks. Chris that looks like a great way to find out if it is the MPU as I suspect. I hope it isn't of course. KJL I am going through the manual switch test and I am getting the same row numbers over and over. It is pretty random as I think it depends on the timing of the MPU column and the exact moment I close a switch. If I do it enough times I manage to find every switch in a row. Thanks again

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