On 7/07/2012 2:21 PM, Michael Black wrote:
These filter capacitors operate at a much higher frequency, which means if they go bad, they will do a much worse job than if 60Hz was involved. The higher frequency ripple that they have to deal with every day may also help to make them go bad. Those filter capacitors after the transformer and diodes are doing much harder work than the high voltage capacitors on the AC side.
Thanks Michael. I guess I'll continue and try replacing all of the electrolytics after the transformer. I should note though, that none of the capacitors (even the ones I replaced) show any signs of leaking or bulging - but I'm guessing they're still the most likely cause of the failure. The caps after the transformer are all low voltage (I think) and easy to come by for a few dollars.
Thanks for your advice. :-) I'll get the parts tomorrow and post back my results. -- Cheers, Mike Find my Apple II projects online at: http://apple2.sytes.net/