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Troubleshooting Old Pioneer Receivers Troubleshooting Made Easy

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If your system has an old Pioneer receiver patch, this manual will help you fix it.

 

 

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  1. A few months ago I bought an old Pioneer SX-1010 radio on Ebay.
    The device is super clean, everything works fine. However, over the past 2 weeks, I have ONLY heard a fairly loud intermittent static sound from the left speaker when I turned on the receiver. It usually takes about 15-30 seconds, then it’s useless and you’re done. All functions work fine, sound is fine.

    Here’s the weird thing: as I said, this crackle only comes from the left speaker, and when I turn the balance knob all the way to the right, the static sound is still coming from the left speaker. If I turn up the volume during this noise, it won’t get any worse. If I turn the volume down completely and turn the balance control all the way to the right, there will still be a crackling sound from the left speaker!

    I cleaned the volume and balance controls very thoroughly with Contact Cleaner, but that didn’t solve the problem at all.

    Any idea what the problem is?

  2. Deoxit is the only thing I can offer. It looks like a dirty volume or balance control. Look for Kaig Deoxite. Many other things are not that good.

    It cannot be serious because it disappears.

  3. Several months ago, I bought an old Pioneer SX-1010 receiver on Ebay.
    The device is super clean, everything works fine. However, over the past 2 weeks, I have ONLY been getting quite loud, ragged and static sound from the left speaker when I turned on the receiver. It usually takes about 15-30 seconds, then it’s useless and you’re done. All functions work fine, sound is fine.

    Here’s the weird thing: as I said, this crackle only comes from the left speaker, and when I turn the balance knob all the way to the right, the static sound is still coming from the left speaker. If I turn up the volume during this noise, it won’t get any worse. If I turn the volume down all the way and turn the balance control all the way to the right, the left speaker will still be three sk!

    I cleaned the volume and balance controls very thoroughly with Contact Cleaner, but that didn’t solve the problem at all.

    Any idea what the problem might be?

    Click to Expand …

    Well it looks like it’s in the left amp behind the volume and balance knobs. As a result, it is not at all strange that the volume and balance controls do not affect it.

    If it’s only 15 seconds long and everything sounds good after that, there may be more problems than the chase worth. It could have been a lot.

  4. Deoxite is the only thing I can offer. It looks like a dirty volume or balance control. Look for Kaig Deoxite. Many other things are not that good.

    It cannot be serious because it disappears.

    Click to Expand …

    I doubt it is doing anything, as it appears to be in the amp zone behind the controls. If it was a dirty controller, he would probably hear it when he stopped controller. If so, then cleaning up the controls would certainly be good.

    I assume this is a leaky capacitor, but there could be many.

  5. Thanks guys. I also forgot to mention that at this point I’m pretty sure it will only show this problem when it’s cold. In other words, if I turn my system off and on again for an hour or so, it will not make any noise. It only seems to work if it hasn’t been used for at least a few hours.

    It honestly doesn’t really matter and I can live with it until it gets much worse. My only concern is that it might damage my speakers. This is an unpleasant sound and sometimes gets quite loud.
    Decreasing the volume temporarily won’t solve the problem either. There is no getting away from this.

  6. If the controller was dirty, it would probably hear it when the controller stopped. If e But it was, clearing orders would certainly be good.

    Click to Expand …

    Right. This is another thing that I forgot to mention. If I turn the volume and / or balance controls while playing noise, the noise remains the same. Neither better nor worse.

  7. Have you measured the DC offset? See this thread on Audiokarma. I would be concerned that the amplifier is supplying high DC voltage to the speaker while noise is being generated. In this case, you will soon be buying spare speakers on this channel. Believe me, I speak from my own experience. Molten voice coils smell terrible. Count me in the “I think this is serious and you should check the amplifier” camp. I think those who suggested a bad capacitor are probably on the right track.

  8. Have you measured DC offset? See This

    Discussion of Audiokarma.

    I would be concerned that the amplifier is delivering a high postVoltage applied to speaker when noise occurs. In this case, you will soon be buying spare speakers on this channel. Believe me, I speak from my own experience. Molten voice coils smell terrible. Count me in the “I think this is serious and you should check the amplifier” camp. I think those who suggested a bad capacitor are probably on the right track.

    Click to Expand …

    I meant this when I mentioned the leaky capacitor. This could be a stage-to-stage interstage coupler, or something similar. If I had a circuit, I could see if he uses it.

    If so, this can also be seen on visual inspection.

    The DC output is fairly easy to see if a DC voltmeter is connected to the output. All of this can be internal, with little or no DC output.

  9. Have you measured DC offset? See This

    Discussion of Audiokarma.
    old pioneer receiver troubleshooting

    I would be concerned that the amplifier will supply a high constant voltage to the speaker during n

     

     

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