(Topic ID: 244732)

Williams Flash PB Coils 1-4 Staying energized. Please help

By StotzBotz

2 years ago

Topic Stats

  • 2 posts
  • 2 Pinsiders participating
  • Latest reply 2 years ago by Atari_Daze
  • No one calls this topic a favorite


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#1 2 years ago

Hello folks. I have a Williams Flash machine that was purchased with a problem I'm trying to resolve. Coils 1 through 4 are staying energized the moment you turn on the power switch. When I got this machine the corresponding driver and pre driver transistors were all burned up so I replaced them. I also replaced IC 1 the 7408 chip and used a socket. All of the coils are new and all of the diodes are new. Trying to determine if there is a chip on the driver board that needs replacing or something else that I'm overlooking. I hate to order a $225.00 Driver board if there is anything else that I can try first. The 40 pin connector on the board is in great shape and might have been replaced. Any help would be greatly appreciated..

#2 2 years ago

Are the switches associated with those coils closed or open?

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