87 t-66
Well-known member
Atari System 2 CPU PCB - missing / incorrect sounds
I am troubleshooting an Atari System 2 CPU PCB that is, for the most part, missing audio. I hear a slight ticking sound when the game is on. If I go into the audio self test, I hear audio, but they are the incorrect sounds. Sometimes the audio self test will produce a constant single tone. I have verified the issue is not any of the socketed chips on the board. Voltages are good. Any ideas would be appreciated. Here is a link to the schematics: http://arcarc.xmission.com/PDF_Arcade_Atari_Kee/Paperboy/Paperboy_SP-275_1st_Printing.pdf
I am troubleshooting an Atari System 2 CPU PCB that is, for the most part, missing audio. I hear a slight ticking sound when the game is on. If I go into the audio self test, I hear audio, but they are the incorrect sounds. Sometimes the audio self test will produce a constant single tone. I have verified the issue is not any of the socketed chips on the board. Voltages are good. Any ideas would be appreciated. Here is a link to the schematics: http://arcarc.xmission.com/PDF_Arcade_Atari_Kee/Paperboy/Paperboy_SP-275_1st_Printing.pdf

