(Topic ID: 283619)

Sega Harley - Switch Column Issues

By dmklunk

45 days ago

Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 13 days ago by dmklunk
  • No one calls this topic a favorite


Linked Games

#1 45 days ago

Hey all,

I am working on a different pin after being out of the game for a few years. Looking for some pointers on a Sega Harley-Davidson.

The game boots up, but the raising/lowering bike just runs constantly (assuming the limit switches aren’t working). None of the ball trough switches work so the game is constantly saying “4 balls missing.”

Once in a while I can finally get it to start a game, but when it starts, it will auto-launch a ball around the upper loop and promptly shoot sparks from the CPU board in the backbox out toward the player if the backglass is removed. I was able to replicate this issue twice (and I don’t really want to try it again). It appears to be originating around the connector “Switch Columns” which checks out since other switches are having issues. I have already replaced the CPU board so I am not sure where the issue could be. I do not see anything glaringly obvious like a staple caught behind the CPU board or anything like that. How can I test for this issue with a multimeter?


#2 44 days ago

I don't know about the sparks or the switch matrix issues. The game has a diagnostic function for testing the motorcycle in the menus, it has information about the limit switches. I think the motorcycle has membrane switches that detect balls. If it thinks balls are in the bike then it will go up and try to remove them before a game can be started. You might start there.

3 weeks later
#3 19 days ago


I sent the boards out for testing & repair. Several transistors, a bridge rectifier, and a few capacitors were tested and replaced where needed. The sparking is gone, but the switch matrix issues persist.

The bike test was a good idea. The limit switches don’t work though... even if I actuate them manually.

In fact, in reviewing the switch matrix, I find that columns 2, 4, 5, (and maybe 6?) are not operational. The switch transistors were proactively replaced, so I know it is not them.

Any recommendations of what else to look for or some direction of where to poke around with the multimeter?

Thanks in advance!

#4 13 days ago

Bump... Any thoughts anyone?

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