At 08:18 -0700 9/1/11, GuyWithGuitars wrote: >Can someone tell me definitively which capacitor(s) (c1, c2, c3, etc) >are for the audio on a Mac SE/30? I have an SE/30 that is running >great except for the audio. There is no audio. > >I made an attempt some time ago to replace all the caps and ended up >jacking an SE/30 board by pulling up a solder pad. > >I received a replacement board and would like to try again with a >different technique, some high quality solder and flux but I don't >want to recap the entire board (yet)
C6, the little one, is in the audio circuit. All of the others are bypass caps on the +12 and +5 volt power busses. But bad C6 is more likely to first create distorted audio before the audio disappears completely. I have had more instances of a bad connection at J6 where the speaker plugs in. Is the red and black pair in good shape? Can you hear a click if you touch the speaker wires to a 1.5 volt dry cell momentarily? Have you tried the phone jack? When something is plugged into that jack the speaker should shut off. It might not turn back on when a plug is removed. And it's also possible that one of the other caps has leaked onto the circuitry on the board that is for audio. Washing is always worth a try. -- --> If it's not on fire it's a software problem. <-- -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/
