mtshark7 Posted July 2, 2015 Share Posted July 2, 2015 So I got an atari 2600 today that just outputs static for the sound. I think I remember reading where the green chicklet capacitor on the switchboard goes bad...would that be the root cause? Thanks for your help! -Mtshark7 Sent from my SM-G900V using Tapatalk Quote Link to comment Share on other sites More sharing options...
zylon Posted July 5, 2015 Share Posted July 5, 2015 Sound failures are usually from these little guys. 1 Quote Link to comment Share on other sites More sharing options...
mtshark7 Posted August 22, 2015 Author Share Posted August 22, 2015 Thanks Zylon! I did replace those...found that solution in the service manual. Unfortunately it didn't fix the problem...so I'm going with one of the chips is dead at this point :-( Sent from my SM-G900V using Tapatalk Quote Link to comment Share on other sites More sharing options...
+DrVenkman Posted August 22, 2015 Share Posted August 22, 2015 If the only problem is the sound, I'd suspect the big red inductor there on the board (which is adjustable with an Allen wrench), which is specifically for adjusting the sound modulation into the RF, or the RF modulator itself. Quote Link to comment Share on other sites More sharing options...
+RichG1972 Posted August 22, 2015 Share Posted August 22, 2015 There is a tall control encased in red on the board that also controls the sound, be careful when adjusting it though, it is trickyhttp://www.cpushack.com/wp-content/uploads/2010/09/Atari2600mobo.jpg It is the red item in this picture that is standing straight up, this also controls sound. You need a very small allen wrench to adjust this and do so in VERY small increments. Quote Link to comment Share on other sites More sharing options...
2600 Forever Posted August 22, 2015 Share Posted August 22, 2015 If the only problem is the sound, I'd suspect the big red inductor there on the board (which is adjustable with an Allen wrench), which is specifically for adjusting the sound modulation into the RF, or the RF modulator itself. There is a tall control encased in red on the board that also controls the sound, be careful when adjusting it though, it is tricky http://www.cpushack.com/wp-content/uploads/2010/09/Atari2600mobo.jpg It is the red item in this picture that is standing straight up, this also controls sound. You need a very small allen wrench to adjust this and do so in VERY small increments. Quote Link to comment Share on other sites More sharing options...
+DrVenkman Posted August 22, 2015 Share Posted August 22, 2015 Yeah, me too. He must have me blocked. Quote Link to comment Share on other sites More sharing options...
ItchAdair Posted September 21, 2015 Share Posted September 21, 2015 The red big device on your board is the cause of your problem. It is the inductor. And it causes the problems in the RF signals. You must replace it. If it is adjustable then adjust it using a knob and ofcourse you will get a clear sound. Quote Link to comment Share on other sites More sharing options...
DVGamerepair Posted December 12, 2019 Share Posted December 12, 2019 Atari 2600 Jr. here. Same problem. I replaced C53, C54, tweaked both pots and still nothing. Finally pulled Q4 and tested and found that it failed. Replaced with a 2N3563 and sound is back! I know this is an old post but hope it helps someone else. Quote Link to comment Share on other sites More sharing options...
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