Track and Field Audio Issue

If you unplugged speakers and it still makes that sound, it has to be coming from some other place, monitor or power supply. Maybe unplug power to monitor and see if noise remains, if I understand corectly.


Turned on my T & F today, video works great, it still plays normally, but just makes a high-pitched squealing noise the entire time. Unplugged both speakers, still no change.

Sounds like this (not my video)

https://www.youtube.com/watch?v=KqW9S6kAmcg

Any ideas?

Shawn
 
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Audio section and amplification seems fine so your problem isn't there.

Sound CPU is not responding and there's a number of causes for that. It does sound like the watchdog is barking.

Have you tried reseating any EPROMs?
 
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Since you unplugged the speakers my guess is monitor. You can also gently tap on the monitor chassis to see if the pitch changes or goes away. Might be the core on the flyback needing to be secured. Use a toothpick and push it down into the core from the top if thats the case.
 
Reseated eproms, seems to have done the trick.

Thanks folks. Now the only annoying sound coming from the game is the kids pounding on the control panel. :)

Shawn
 
Sometimes it's as simple as that. T&F is a multi CPU board ( one for the game code and a separate one for sound ). The CPU needs instructions to do something and if there's no program to run then the CPU will either sit idle or get stuck in a reset loop depending on the design of the board.

The sockets in these aren't great, so reseating EPROMs and the Konami custom chips is always a good first step. At least you know what to do when it happens next time.
 
Sometimes it's as simple as that. T&F is a multi CPU board ( one for the game code and a separate one for sound ). The CPU needs instructions to do something and if there's no program to run then the CPU will either sit idle or get stuck in a reset loop depending on the design of the board.

The sockets in these aren't great, so reseating EPROMs and the Konami custom chips is always a good first step. At least you know what to do when it happens next time.

Yeah, Replace the sockets.

Good call on the Eprons.
 
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