(Topic ID: 206225)

1977 Evel Knievel SS Solenoid issue

By Tmusg2499

6 years ago



Topic Stats

  • 2 posts
  • 2 Pinsiders participating
  • Latest reply 6 years ago by dothedoo
  • No one calls this topic a favorite

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#1 6 years ago

When I turned the machine on MPU shows green lights flashing and goes through its steps 2 flashes and then 7 more? After that it does weird things now. I have checked and replaced all the fuses (6). I have tested each solenoid and they fire. The issue is the solenoid or I believe it is called the knocker goes off numerous times and then half the solenoids do not work once the games starts. I have tested the Solenoid driver resistors. I see no wires loose. Does any one know what would cause this issue? It just started a few days ago. Been working great. I put it in solenoid test mode and 7,8,10,11 do not fire. I jumper them to ground on the non power side and they all fire.. Any help would be appreciated.

Thank you,

Tim

#2 6 years ago

Check J4 on the MPU and J4 on the solenoid driver. Sounds like you have a pin that is not making a connection.

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