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SX-450 Help

Alex Hayes

Active Member
Hey guys, I recently picked up a Pioneer SX-450 for very cheap and am attempting to get it going. It was really dirty with nicotine stains or whatever the residue is called from cigarette smoke. I plugged it in and tested it and both channels came through but were very scratchy. I figured a deoxit bath would be a good first step to solving the issue. I sprayed all the switches and pots and worked them back and forth and let it sit for the recommended 2 minutes. I plugged it in again and hooked up a turntable and some speakers and tested it. It powered up fine and worked and sounded great for at least a good 5 minutes. After a bit a crackling sound began coming through and the lights started flickering and sound was cutting in and out. I turned it off and on several more times and the bulbs would either barely flicker or not flicker at all. I read on here that a very common problem is a dirty power switch that can be disassembled and cleaned t fix it. The symptoms sound similar but not exactly the same as what I'm experiencing. Could this fix my problem? Or could there be an issue with the power transformer or caps? It probably wouldn't hurt to clean the switch regardless but I would love to hear any suggestions you may have. While the receiver was working it sounded great so I really would like to get it going! Thanks for any help!
 
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Sounds like the power switch.

I had an SX-450 that did that. It was the power switch.

Rob
 
I hope it's the power switch. Also if you give anything a Deoxit bath, I would suggest that you let it sit and dry for a day. Any wet residue would might cause something to short out.
 
Alright thanks guys. I will try it again later after sitting for a longer period of time. If the problem persists I will try the power switch fix and go from there.
 
There is a short cut to remove the power switch. I remove the fuse near the power switch, then I unsolder the small fuse holders. The power switch slides backward easily after the retaining nuts are removed.
 
There is a short cut to remove the power switch. I remove the fuse near the power switch, then I unsolder the small fuse holders. The power switch slides backward easily after the retaining nuts are removed.


Never having been IN a 450 (unusual!!!), but looking at the pictures in the other thread, that is NEAT!!! Kudos!!!!

I wonder if I would have struggled, or seen that..... we'll never know - thus I tip my hat to you!!
 
Never having been IN a 450 (unusual!!!), but looking at the pictures in the other thread, that is NEAT!!! Kudos!!!!

I wonder if I would have struggled, or seen that..... we'll never know - thus I tip my hat to you!!

Yes, great idea Ecluser, thank you very much! :tresbon:
 
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