Eden RS210 power caps

[Randall]

Eden Nemesis RS210 comes in with a hum, which sounds like power supply. The big caps look suspicious with the way the goop is applied. I flip the RS320 power supply board, and sue enough, the caps have been hacked, looks like someone had a bit of a time getting the old ones out and did some damage, and then "repairs".

No luck finding a schematic (no surprise here). Now, how do I find out what the proper value is for these? I sure don't trust replacing with what is in there now will be correct. I've dropped Eden a line, but I doubt they will help. They are C501 and C502.

[The Dude]

If I recall, the RS series of amps were all very similar. If so, this might help.

http://music-electronics-forum.com/a...-na650-sch.zip

[Randall]

Yeah, I had already seen that thread, but my PS does not resemble that schematic. Right now it has two huge 10,000uF/100v in there. Not sure whether to replace with that same value or not.

[Randall]

Well, lo and behold I got a response from US Music Corp. They tell me the value is 8200@80v, so now the hunt is on.

[Leo_Gnardo]

Well, lo and behold I got a response from US Music Corp. They tell me the value is 8200@80v, so now the hunt is on.

As usual the exact capacitance value does not need to be matched. And the caps that are in there rated 100V, no problem using those to sub for 80V ones.

Following advice I saw on these pages a couple days ago: if that supply is on a double sided board, it is possible there were thru-plated holes (aka vias) where the caps were mounted, so that the lands either side of the board were connected to capacitor terminals via the metal lining the holes. It is possible the previous tech ripped the thru-plating/vias away when he removed the old filter caps. Hey, I've done that... Also on occasion current passing thru these tiny bits of metal plating is enough to cause them to vaporize (!). So make sure there's a sufficient current path from one side of the board to the other if the plating thru the holes has been damaged.

[J M Fahey]

I bet itīs easier today to find 10000x100 than 8200x80 and to boot they will be same size, might even be smaller, those amps are at least 10 years old and wouldnīt be surprised at 20 y.o.

[Randall]

Yeah I'm pretty sure those traces will need some thru hole repair, this is a mess. No problem putting in the original value caps, Mouser has them. I can't wait to see what is under those guys when I pull them off. Then maybe I will see why one of the legs of one of the caps doesn't reach thru the hole!