(Topic ID: 135481)

Devils Dare Sound Board

By Vengeance

8 years ago



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  • 2 posts
  • 2 Pinsiders participating
  • Latest reply 8 years ago by Lindsey
  • Topic is favorited by 1 Pinsider

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#1 8 years ago

So I was having an issue with my Devils Dare Sound board, the sound/speech would work 100% but intermittently. When it was working it was fine, when it wasn't I got no sound at all.

Figuring it must be connectors, I went ahead an repined the connector to the sound board, but in doing so I did a shitty job and some of the wires fell out of the pins and I messed up the wire order.

The -12V that should have been on pin3 accidentally got put on pin4, I've now since fixed that.

Since doing that, I can't get the sound board to work at all, not even the self test is working now

This is a picture of the soundboard schematic:

DevilsDare sounds Board.jpgDevilsDare sounds Board.jpg

I'm trying to figure out what I could have possibly screwed up and what I should replace.

Also if anyone has a working spare they want to sell I'd consider going that route as well.

1 week later
#2 8 years ago

Possibly fried the LM193 analog comparator at U24. Connecting -12V to pin 4 of connector A6P1 would connect -12V to the positive input of one of the comparators. The data sheet specifies that they're good to 36V but those would be positive voltages. Negative could definitely fry the IC.

LM193 datasheet:
http://www.ti.com/lit/ds/symlink/lm193.pdf

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