At 23:22 -0700 10/20/13, Mike Carpenter wrote: >Could I tell if any of the caps are bad from a visual inspection or do I need >to get a tester? >
With good light and a lens look not at the capacitor but at the circuit board below it. If you see any evidence of spotting by a liquid it's probably because the capacitor has leaked acid. Get it out of there. Also the capacitor probably has a silvery metal top that has a couple of crossed grooves visible at the top. The groves should be flat. If they are blistered up it is because internal pressure has blown them up. The grooves are there to prevent an explosion but if the have leaked at all or even just bubbled up it's time to toss the capacitor. The capacitors are typically used between ground and either the +12 or +5 volt power sources and they are scattered around the circuit board to compensate for resistance and inductance in the paths on the board. Trying to measure one while it's still soldered down you will connect your meter to several capacitors at a time and wont get much information on the closest one. -- --> A fair tax is one that you pay but I don't <-- -- -- ----- 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 vintage-macs@googlegroups.com To leave this group, send email to vintage-macs+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/ --- You received this message because you are subscribed to the Google Groups "Vintage Macs" group. To unsubscribe from this group and stop receiving emails from it, send an email to vintage-macs+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
