(Topic ID: 170810)

Buck Hunter and Q15 transistor issue.

By Arcade

3 years ago

Topic Stats

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


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#1 3 years ago

Sorry this is a long post but I wanted to get all the info about this problem into one post. Any help appreciated.

I think I already know the answer to this but wanted to ask the experts.
Some people local to me own a Big Buck Hunter pinball.
Sometime last year they called me because the left flipper was not working.
I arrived and tracked the problem down to the Q15 transistor. It had completely blown out.
I removed the board and noted that it had been removed before so it was an obvious issue.
I replaced it and all has worked fine for a year.

Fast forward to today.
They say the left flipper button stuck in and caused the flipper to stop working.
I went ahead and replaced the actual button as it was a bit gummed up.
Then I checked the fuse next to the flipper coil. It was bad.
I replaced the fuse and powered on the game.
Instantly the left flipper energized and stuck on.
After checking that the flipper switch was not stuck together and nothing was shorted on the coil I replaced the Q15 transistor with a new one. But I still get the same problem. Flipper instantly energized at game power up.

Now my best guess is that the traces on the board are not great now and something is not getting soldered correctly.
And if that is the case I will need to find someone who can do through hole repair work at a reasonable price for these guys.
It would be past my skill level.
But I am open to any ideas that I may be missing.

#4 3 years ago
Quoted from LTG:

Through hole continuity or cracked trace could be the issue.
LTG : )

Yea. That is what I was afraid of.
I will see if some of my local pinheads can repair this.
If not I will find someone here on Pinside.
Chris Hilber did some awesome work for me on my TAF main board after a cap leak.

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