09-10-2026, 12:14 AM
Hello guys,
I’ve got a 1970s Sony CF-320 portable radio on my bench for repair. So far, I’ve replaced two of the three rubber belts and about five electrolytic capacitors. One was a 2200µF at 10 volts, but it only measured around 110 pF—definitely done for—so I swapped it with a 2200µF at 16 volts. There was some foam padding taped over the wires that had deteriorated, and I’ll post photos of it. I’m curious what others have used as a replacement. One thing I could really use is the service manual, as this is the one model missing from my Sony documentation. Here’s a photo showing the radio and its condition.
Also couple of the other capacitors that were bad were a couple of .47 ufd electrolytics I replaced with some film capacitors instead . they were basically a 15 ohm resistor they were so leaky .
Sincerely richard
I’ve got a 1970s Sony CF-320 portable radio on my bench for repair. So far, I’ve replaced two of the three rubber belts and about five electrolytic capacitors. One was a 2200µF at 10 volts, but it only measured around 110 pF—definitely done for—so I swapped it with a 2200µF at 16 volts. There was some foam padding taped over the wires that had deteriorated, and I’ll post photos of it. I’m curious what others have used as a replacement. One thing I could really use is the service manual, as this is the one model missing from my Sony documentation. Here’s a photo showing the radio and its condition.
Also couple of the other capacitors that were bad were a couple of .47 ufd electrolytics I replaced with some film capacitors instead . they were basically a 15 ohm resistor they were so leaky .
Sincerely richard
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