WANTED - Working Atari 720 Audio II Board

b_koenig

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Need one that works. Mine cuts in and out. PM me with price if you have one to sell. It looks like this:
photo%2020_zpslvhxzvti.jpg
 
chances are your audio board is ok. I have ran into this problem before on certain 720 board sets.

thinking it was my audio board I replaced the audio chip on the pcb and this took care of the problem.

the chip is in a socket so its easy to replace. its the larger Yamaha chip located in j16 right in the middle. you can find them on ebay with a search.

if not you can send me your audio board and I can test it and fix it.

chad
 
Audio is fine. I am having issues with my machine resetting after the machine warms up, similar to what I get when I remove the power to the sound board and plug it back in. I have checked all power connectors to the boards and they are all getting correct voltages. I have replaced the switcher as well.
 
Audio is fine. I am having issues with my machine resetting after the machine warms up, similar to what I get when I remove the power to the sound board and plug it back in. I have checked all power connectors to the boards and they are all getting correct voltages. I have replaced the switcher as well.


what voltages are you getting at your boards and switcher? have you ever changed out your power connectors at the boards and molex connectors on your main wire harness?

thanks

chad
 
I'd like to find a working power board for a spare anyway. If this isn't mu issue, I'll check the voltages at the connectors. Bunp! Anyone have a working one to sell?
 
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