(Topic ID: 172650)

Meteor Sound ***Fixed***

By tomdotcom

7 years ago


Topic Heartbeat

Topic Stats

  • 35 posts
  • 9 Pinsiders participating
  • Latest reply 7 years ago by tomdotcom
  • Topic is favorited by 4 Pinsiders

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Linked Games

  • Meteor Stern Electronics, 1979

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#4 7 years ago

Did the sound problem begin when you installed NVRAM or when you moved the game?

Try something not invasive first... Sever the IRQ from the sound board. Easiest way to do this is to only use pins 1-32 on the J5 connector. If you have 34 pin plug, shift the connectors over two pins to the right on both ends of the sound board ribbon. That will leave 33 and 34 disconnected.

The IRQ is not required for the 6840 chip on the sound board and it being connected occasionally causes problems.

#16 7 years ago

did you try disconnecting the IRQ from the 6840 on the sound board? Either move the j5 connector so the last two pins are not connected or bend the IRQ pin out of the 6840 socket. No games need it to be connected. I have seen the IRQ signal at the 6840 cause problems more than a few times.

If its not a connector problem, fixing the sb300 is a bit more advanced. You have to watch the signals travel through the board during solenoid test or while triggering sounds in game mode

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