Interesting find in a pioneer sx-727

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Spinit66

New Member
Hello all. Wanted to share my interesting find in a pioneer sx-727 that I just bought. Apparently someone did not have the appropriate replacement for a bad power supply capacitor, so they wired up two together and put electrical tape around them and called it a day. The receiver was functioning properly, but it would have been so much easier to get the right capacitor.
 

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coonmanx said:
Electricity won't know the difference but "C'mon man"... Not that hard to find a correct replacement capacitor. Guy doing the work was probably like, "Well I have these two capacitors on my work bench"...
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The tape job and using a piece of wire to hold it in place is so sketchy. Couldn’t believe it when I saw it.
 
I did this once on the bench because I took an old capacitor out, didn't have the correct replacement, and wanted to keep working on it and find out what else was broken. I think it was a Pioneer SA 3000 that uses quite large 50V capacitors, which I didn't have, so I put two smaller ones in parallel. But only as a bench workaround. With clips, didn't actually solder it. A week later I had the proper replacements (and other parts) and put it back together properly
 
d_bolle said:
I did this once on the bench because I took an old capacitor out, didn't have the correct replacement, and wanted to keep working on it and find out what else was broken. I think it was a Pioneer SA 3000 that uses quite large 50V capacitors, which I didn't have, so I put two smaller ones in parallel. But only as a bench workaround. With clips, didn't actually solder it. A week later I had the proper replacements (and other parts) and put it back together properly
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I've done similar things while working on something. Paralleling caps, resistors, using a 100v cap in place of a 25v temporarily, etc.
The worst "repairs" I've come across were where random value resistors, caps, and even transistors were used. This was done in two different pieces of equipment. I bought an integrated amp and power amp as non working to begin with. Once I dug into them I saw why they weren't working. :rolleyes:
 
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Lavane said:
I've done similar things while working on something. Paralleling caps, resistors, using a 100v cap in place of a 25v temporarily, etc.
The worst "repairs" I've come across were where random value resistors, pas, and even transistors were used. This was done in two different pieces of equipment. I bought an integrated amp and power amp as non working to begin with. Once I dug into them I saw why they weren't working. :rolleyes:
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I am just starting my journey repairing vintage audio. Sure I will see some more unique work down the road.
 
The black cap underneath doesn't look very well placed either. Good chance the whole thing would have shorted through the metal can.
 
The "tech" probably was against using spacers, tubing, or whatever to allow the newer, smaller, radial caps fit the existing clamp since it doesn't look right to him. :rflmao:
 
John3655 said:
The black cap underneath doesn't look very well placed either. Good chance the whole thing would have shorted through the metal can.
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For sure. I looked at pictures of how they are supposed to be. That cap originally leans out over the one filter cap. When they rigged up the two capacitors together, it was bent in the other direction.
 
jheu02 said:
The "tech" probably was against using spacers, tubing, or whatever to allow the newer, smaller, radial caps fit the existing clamp since it doesn't look right to him. :rflmao:
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They left the original leaking cap in place. From the top it looks all original. lol
 
Spinit66 said:
They left the original leaking cap in place. From the top it looks all original. lol
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This something us tube guys do with vintage tube gear. You leave the original tired old multi-cap can up top to look original, and install new seperate caps underneath. Some will even go to the trouble of restuffing the original cap cans with new caps. But in the case of the SX-727 it was just sloppy work. A new cap would have been easy to find to replace the original cap. JJ, Mundorf, etc. make dual caps also that ive used.
 
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