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#1
Posted to rec.audio.misc,rec.audio.tech
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Pioneer VSX-502 receiver - can hear radio faintly when in CD or TV mode
I have a Pioneer VSX-502 audio/video stereo receiver purchased in
1993. It has developed a problem - when in CD or TV mode, i.e., not in Tuner mode, one can hear some sort of radio faintly in the background. When the volume is moderately high, it becomes very annoying - such as while listening to soft passages of music or speech in non-tuner mode, when one can hear what sounds like the radio coming through. What is this "cross-talk" problem called? Is there a fix for it, or do I need to replace it with a new receiver? Thanks for all suggestions. |
#2
Posted to rec.audio.misc,rec.audio.tech
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Pioneer VSX-502 receiver - can hear radio faintly when in CDor TV mode
OldReceiver wrote:
I have a Pioneer VSX-502 audio/video stereo receiver purchased in 1993. It has developed a problem - when in CD or TV mode, i.e., not in Tuner mode, one can hear some sort of radio faintly in the background. When the volume is moderately high, it becomes very annoying - such as while listening to soft passages of music or speech in non-tuner mode, when one can hear what sounds like the radio coming through. What is this "cross-talk" problem called? Is there a fix for it, or do I need to replace it with a new receiver? Thanks for all suggestions. If the "radio" you are hearing is whatever the tuner section is tuned to, then this is indeed crosstalk inside the receiver. As you say it has just recently started doing it, it is difficult at long-range to diagnose what could have caused it. I would suspect an earthing problem, possibly an earthing tag has come loose, or has some corrosion around it. If the "radio" you are hearing is not what the tuner is tuned to, then it is most likely being picked up externally. The chances are that it is a jumble of signals, making it very difficult to pick one individual signal out of the mess. Most likely caused by again some grounding problem or the something changing internally causing RF instability in the amplifiers. In many amplifier designs there are small capacitors used for stabilisation. If one of those has failed, or has a dry soldered joint, it could cause what you describe. I once had an amplifier that did what you describe, I finally found the amplifier had an HF oscillation that beat with the RF normally picked up on loudspeaker cables and produced the low-level but irritating noise. As you say it varies with volume level, I would therefore look to the pre-amp section first. Good luck, this sort of fault is the very devil to fix. S. -- http://audiopages.googlepages.com |
#3
Posted to rec.audio.misc,rec.audio.tech
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Pioneer VSX-502 receiver - can hear radio faintly when in CD or TV mode
"OldReceiver" wrote ...
I have a Pioneer VSX-502 audio/video stereo receiver purchased in 1993. It has developed a problem - when in CD or TV mode, i.e., not in Tuner mode, one can hear some sort of radio faintly in the background. When the volume is moderately high, it becomes very annoying - such as while listening to soft passages of music or speech in non-tuner mode, when one can hear what sounds like the radio coming through. What is this "cross-talk" problem called? Can you hear the signal well enough to identify it? Is it the same radio station that you would hear if the switch was selecting the tuner? If so, then it is more likely to be an audio crosstalk problem within the receiver. OTOH, if it is some other radio station, then you may be experiencing RFI (interference from radio waves). Do you live near a broadcasting tower farm? Do you hear this radio station in any other audio equipment? Is there a fix for it, or do I need to replace it with a new receiver? There is likely a fix for it, but you have to properly identify what kind of problem it is, first. Then it would depend if the expense of the fix exceeds the value of the equipment. |
#4
Posted to rec.audio.misc,rec.audio.tech
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Pioneer VSX-502 receiver - can hear radio faintly when in CD or TV mode
Thank you both for your helpful responses. Here's a bit more info.
The noise seems to be more than one radio station, and not clear enough to identify one particular station, so it would seem to be RFI. No, I do not live near a broadcasting tower farm, nor do I hear it in any other audio equipment. Also, it seems to be audible only when CD is chosen, not TV (sorry for the incorrect info). This occurs whether a CD is actually being played or not, e.g., when no signal at all is incoming through the CD inputs. It sounds like a mass of distant radio stations al jumbled together. And here is another important clue (just discovered): the cables (left and right) going into the CD inputs are from the "out" of my computer's sound card (Audigy ZX) (a stereo out that is then split into a "Y" that goes into the two cables that in turn go into the back of my Pioneer receiver). When the cables are removed from the Pioneer's CD input the RFI goes away. So it would seem that the receiver itself may not be to blame. However, I'd still like to clear up this problem, because I use my Dell WinXP Media Center computer to store and play mp3's and video programs (TV, AVI's, etc.), and the RFI is annoying when playing mp3's, etc. What might be the source and a solution? On Thu, 3 May 2007 06:55:09 -0700, "Richard Crowley" wrote: "OldReceiver" wrote ... I have a Pioneer VSX-502 audio/video stereo receiver purchased in 1993. It has developed a problem - when in CD or TV mode, i.e., not in Tuner mode, one can hear some sort of radio faintly in the background. When the volume is moderately high, it becomes very annoying - such as while listening to soft passages of music or speech in non-tuner mode, when one can hear what sounds like the radio coming through. What is this "cross-talk" problem called? Can you hear the signal well enough to identify it? Is it the same radio station that you would hear if the switch was selecting the tuner? If so, then it is more likely to be an audio crosstalk problem within the receiver. OTOH, if it is some other radio station, then you may be experiencing RFI (interference from radio waves). Do you live near a broadcasting tower farm? Do you hear this radio station in any other audio equipment? Is there a fix for it, or do I need to replace it with a new receiver? There is likely a fix for it, but you have to properly identify what kind of problem it is, first. Then it would depend if the expense of the fix exceeds the value of the equipment. |
#5
Posted to rec.audio.misc,rec.audio.tech
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Pioneer VSX-502 receiver - can hear radio faintly when in CD or TV mode
OldReceiver wrote:
[....] And here is another important clue (just discovered): the cables (left and right) going into the CD inputs are from the "out" of my computer's sound card (Audigy ZX) (a stereo out that is then split into a "Y" that goes into the two cables that in turn go into the back of my Pioneer receiver). When the cables are removed from the Pioneer's CD input the RFI goes away. It might be something as simple as a lousy cable letting RF leak into your system. I'll bet this is the first time you've used this cable on this receiver. First you want to see whether the computer is at fault (doubtful), so try plugging the cable into an iPod or something similar to see whether the problem follows the computer. Next try a different cable and plug in a CD player into the CD player ins, to see whether the receiver input is implicated. Francois. |
#6
Posted to rec.audio.misc,rec.audio.tech
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Pioneer VSX-502 receiver - can hear radio faintly when in CD or TV mode
"OldReceiver" wrote ...
Thank you both for your helpful responses. Here's a bit more info. The noise seems to be more than one radio station, and not clear enough to identify one particular station, so it would seem to be RFI. No, I do not live near a broadcasting tower farm, nor do I hear it in any other audio equipment. Also, it seems to be audible only when CD is chosen, not TV (sorry for the incorrect info). This occurs whether a CD is actually being played or not, e.g., when no signal at all is incoming through the CD inputs. It sounds like a mass of distant radio stations al jumbled together. Then it is definitely RFI, not audio crosstalk. And here is another important clue (just discovered): the cables (left and right) going into the CD inputs are from the "out" of my computer's sound card (Audigy ZX) (a stereo out that is then split into a "Y" that goes into the two cables that in turn go into the back of my Pioneer receiver). Sorry. I read that through five times slowly and I still don't understand how you have that hooked up? Wanna try that again? If cables go directly from your computer out to your Pioneer receiver "CD in", what is the reason for the "Y-adapters"? Are you trying to run BOTH the computer AND the CD player into the same input on the receiver? When the cables are removed from the Pioneer's CD input the RFI goes away. So use the standard technique of unplugging everything and then replace it one piece at a time until the RFI re- appears. Try without the Y-adapters, and then WITH them, etc. etc. Try wiggling the cables/connectors. Try using different cables and/or adapters, etc. |
#7
Posted to rec.audio.misc,rec.audio.tech
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Pioneer VSX-502 receiver - can hear radio faintly when in CD or TV mode
OldReceiver wrote:
Thank you both for your helpful responses. Here's a bit more info. The noise seems to be more than one radio station, and not clear enough to identify one particular station, so it would seem to be RFI. No, I do not live near a broadcasting tower farm, nor do I hear it in any other audio equipment. Also, it seems to be audible only when CD is chosen, not TV (sorry for the incorrect info). This occurs whether a CD is actually being played or not, e.g., when no signal at all is incoming through the CD inputs. It sounds like a mass of distant radio stations al jumbled together. And here is another important clue (just discovered): the cables (left and right) going into the CD inputs are from the "out" of my computer's sound card (Audigy ZX) (a stereo out that is then split into a "Y" that goes into the two cables that in turn go into the back of my Pioneer receiver). When the cables are removed from the Pioneer's CD input the RFI goes away. So it would seem that the receiver itself may not be to blame. However, I'd still like to clear up this problem, because I use my Dell WinXP Media Center computer to store and play mp3's and video programs (TV, AVI's, etc.), and the RFI is annoying when playing mp3's, etc. What might be the source and a solution? On Thu, 3 May 2007 06:55:09 -0700, "Richard Crowley" wrote: "OldReceiver" wrote ... I have a Pioneer VSX-502 audio/video stereo receiver purchased in 1993. It has developed a problem - when in CD or TV mode, i.e., not in Tuner mode, one can hear some sort of radio faintly in the background. When the volume is moderately high, it becomes very annoying - such as while listening to soft passages of music or speech in non-tuner mode, when one can hear what sounds like the radio coming through. What is this "cross-talk" problem called? Can you hear the signal well enough to identify it? Is it the same radio station that you would hear if the switch was selecting the tuner? If so, then it is more likely to be an audio crosstalk problem within the receiver. OTOH, if it is some other radio station, then you may be experiencing RFI (interference from radio waves). Do you live near a broadcasting tower farm? Do you hear this radio station in any other audio equipment? Is there a fix for it, or do I need to replace it with a new receiver? There is likely a fix for it, but you have to properly identify what kind of problem it is, first. Then it would depend if the expense of the fix exceeds the value of the equipment. If the receiver is over about 2 years old the power supply could be noisy and this could account for your problem. If the sound card has a digital output available, try that instead, going to one of the digital inputs on the receiver. Some sound cards have a "multi-use" output even if they don't have a dedicated optical or coaxial digital output. Mark Z. |
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