(Topic ID: 44519)

TAF sound help

By murfe88

11 years ago



Topic Stats

  • 10 posts
  • 4 Pinsiders participating
  • Latest reply 11 years ago by murfe88
  • Topic is favorited by 1 Pinsider

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#5 11 years ago
Quoted from murfe88:

I picked up a TAF and the sound is missing speach and different sounds. The chips have been replaced on the board. The Diodes are good. I get the bong when the game boots up. The sound plays through the menu until you try to play a game then it gets all messed up. My neighbor has a TAF and we put his rom on my bad board and put it into his machine and it does the same thing so I dont think it is the rom.
Anybody have any suggestions ?

Let me see if I have the facts here.
1. What chips were replaced?
2. What diodes? With that sound board, the 47uf caps are more of an issue.
3. In test, ALL sounds play correctly.
4. What does "all messed up" mean? Do you mean that some sounds are missing?
5. Yes, you've ruled out the ROM. You've also isolated the issue to your sound board.

Answer these questions, and note correctness of my interpretation, and we'll go from there.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#7 11 years ago
Quoted from murfe88:

We replaced the following below on the sound board. The diodes on the sound board where not replaced but tested ok. In test the sound plays correct but when you start a game there are voice call outs missing and there is background music missing.
Transistor - neg. 12v Regulator TO-220
Transistor - 12v Reg. TO-220
IC - 20 pin DIP octal edge trig flip-f

That particular sound board has several "channels" that originate sound.
Most of them, IIRC, use 47uf caps in series. I'd start by replacing those caps.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

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