Noise on one channel of phono stage

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Idler50

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In an obscene stroke of luck, I happened upon a Pioneer SX-850 last week at our local recycling station that followed me home. I cleaned it up and it looks like new. I've been enjoying it and everything seemed to work great until last night. I was listening to an album last night while I worked. The album ended and I ignored it probably for 30 minutes when all of a sudden holy hell broke loose. I thought my house was under attack. It was the stereo sending all kinds of loud pops and noise through the right channel. It sounded like someone dropping 100 microphones. I played with it a little more just now and the noise is still present. It's only on the right channel and only on either of the 2 phono inputs. I tried 2 turntables and it's the same with both. If I disconnect the turntable the noise is still there. When I power up it takes 15-20 seconds for the noise to really build up but it's there. AM, FM, and aux with streaming music all seem fine. I suppose I could go get a pre-amp and run the turntable through aux but that's not ideal. Is there someplace easy that I could look to get my phono stages back in order? Something I haven't considered cleaning yet? I had cleaned phono 1 rca jacks already. I hadn't phono 2 figuring it wouldn't be used right away. I cleaned the pots best as I could. I didn't clean the push buttons as they seem really closed up tight.

And on a side note, once the face plate was removed I could see the front of the pots and it looked like a small opening on the front. Did Pioneer actually engineer those to be cleaned without going through the bottom? I went through the bottom but was wondering if I could have done it easier.

Thanks in advance.
 
Probably need this moved to the SS forum if you want replies that can help. This is the tuner forum...
 
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