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(Topic ID: 52426)

AC/DC NIB canon auto fires

By Pincrazy

7 years ago

Topic Stats

  • 10 posts
  • 9 Pinsiders participating
  • Latest reply 7 years ago by phishrace
  • No one calls this topic a favorite


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#1 7 years ago

Just set up a brand new Premium AC/DC last night and discovered my canon auto fires right when it rotates to where it lines up at the canon. Then Steve tells me to press the fire button next time. I have code 1.65 installed, checked underneath and everything looks good. Any suggestions would be much appreciated. I found a couple threads that talked about the opto switch but I had a hard time locating where it was. Thanks in advance for any help.

#2 7 years ago

NIB and auto-firing, that's cool!

The opto is located around the 'half moon' part, that rotates with the cannon.
There are 2 switches for the cannon as far as I know, both should be checked and might be adjusted in your case.

#3 7 years ago

Make sure the screws are tight that hold the opto, that fixed mine.

#4 7 years ago

Mine does this, but only on occasion. It's like the ball gets loaded, Steve says "Get ready...", and then the canon cranking noise goes silent, the canon swings out and back and auto fires. It's got to be opto or switch related, but I haven't looked into it yet.

#5 7 years ago

the same problem at my NIB Premium

it must be a problem with the optoboard

but in switch test both switches are working fine!

#6 7 years ago

Is this common on the latest run? I'm replacing my pro with a premium tomorrow and I hope this is not a common issue.

#7 7 years ago
Quoted from rockinganker:

Is this common on the latest run? I'm replacing my pro with a premium tomorrow and I hope this is not a common issue

Mine's a first run LE, so it's been around for a while. Not every game does this. I'll check the optos out this weekend.

#8 7 years ago

i had to push the cannon manually back to the home postion to line up with the 'home' opto.. just a minor shift.. has worked great since.

#9 7 years ago

After a couple months of ownership mine started doing this. I did a switch test and they are all working. I poked a screwdriver over the Switch#62 opto and can manually trip it.

Watching the cannon from underneath, it autofires immediately upon triggering switch 62.

Not sure what else to look at. hmmm..

#10 7 years ago

There is a game specific test for the cannon in diags. With the test started and the coin door closed, push the start button and the cannon should rotate about 1/3 of the way out and stop. Push the start button again and it should rotate all the way out and back to the home position without stopping. While running the test, watch the DMD to see that the switches are working properly. If the two micro switches are working properly, you have an opto issue.

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