gomez6211 Posted July 12, 2007 Report Share Posted July 12, 2007 Hello all, I recently purchased a color classic, but the sound doesn't seem to work. I connected the actual speaker to a waveform generator I have, so I know it works. I traced back the wires to the analog board, but could find nothing wrong with it. I tried connecting some headphones the port in the back, but no sound comes out of those either. I really want to get this thing working so I can perform the Mystic upgrade. I would appreciate any help y'all could offer. Quote Link to post Share on other sites
Bolle Posted July 12, 2007 Report Share Posted July 12, 2007 when you go mystic you swap in another mobo and that should bring the sound back hmm? Quote Link to post Share on other sites
tomlee59 Posted July 12, 2007 Report Share Posted July 12, 2007 I'm sure you already checked the following, but just in case not... 1) Make sure you don't have the sound slider on minimum, and verify that you're not muting the thing. 2) IIRC, there is a coupling capacitor between the audio driver and the speaker. During your tracing, you undoubtedly encountered it. That capacitor has a habit of dying, so if you can't find anything wrong, just replace the cap and see what happens. Quote Link to post Share on other sites
Bolle Posted July 12, 2007 Report Share Posted July 12, 2007 but when the cap dies it should make all kind of weirdo sounds cause the cap is only for filtering, shouldn´t it? Quote Link to post Share on other sites
68kMLA Supporter paws Posted July 12, 2007 68kMLA Supporter Report Share Posted July 12, 2007 Don't you mean 'non audio'? Quote Link to post Share on other sites
tomlee59 Posted July 13, 2007 Report Share Posted July 13, 2007 but when the cap dies it should make all kind of weirdo sounds cause the cap is only for filtering, shouldn´t it? Normally, yes, but the cap I'm referring to in this case would be in series with the speaker, not a bypass across the power supply. If this cap dies, you get no (or very weak) sound. Now, having said that, I am not at all certain that there is such a cap in this model. I'd promised Stuart Bell to extract a schematic from an analog board he arranged to have delivered, but as with many of my projects, it's for some other day... Quote Link to post Share on other sites
TheNeil Posted July 13, 2007 Report Share Posted July 13, 2007 Have you checked for capacitor leakage on the motherboard? Quote Link to post Share on other sites
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