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Sanyo JCX2900 classic receiver. Cannot eliminate static with "normal" means. Static doesn't seem to come from one knob or switch. Checked all connections, etc. It is in both channels and all settings i.e. aux, phono, radio, speakers a, b, c, etc. I verified it is in the preamp sec not the amp. I can eliminate it 75% with the tone defeat button. Bad tone board? What confused me is that tone defeat does not eliminate it 100%. Am I on the right track? What other things could do this? Is there a way to "hard" bypass the tone PCB altogether?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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dsom
  • 56 Answers

SOURCE: Static comes from speakers

I think it's a grounding problem. Actually, it's a necessity for all audio-video equipments to get grounded properly. If you don't have a ground connection in your AC plug, your receiver will collect more and more static electricity. As a matter of fact, it decreases the sound quality that you can get from your equipment. I think that the effect of your reaction (slapping the receiver) isn't coincidental. When you touch any metal surface on your receiver (even while slapping) you condact the static electricity to the ground. I've had a same sort of problem with my receiver. Especially when I connected my laptop computer to the receiver, I heard an annoying distorted sound from the speakers. I found out that it was ground loop, which occurs when the negative (common) signal of the source coincides with the one of the receiver's. As a solution, I grounded my amp, changed all wires with new and shielded ones, and purchased an AC filter. Then, I got rid of the noise. I have to say that the AC filter (Belkin Pure AV Surge Protector, it also includes an AC signal filter)benefited me the most.

Posted on May 03, 2007

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SOURCE: Onkyo TX-SV414PRO - Right channel has no audio, left channel works fine.

get a new receiver

Posted on Feb 10, 2008

marsrover
  • 682 Answers

SOURCE: No sound/test tone front front right channel

1-make a reset to your system.2-repeat your speaker setup.3-confirm that you assign your sysem for 5 chanell surround system.-4-change the cables between left and right front speakers if the trouble go to left channel you will have a problem in receiver itself-if the problem exict you will have a problem in speaker itself(cable or speaker)

Posted on Sep 30, 2008

  • 1 Answer

SOURCE: STATIC!

I found this on the Apple Website...

http://discussions.apple.com/thread.jspa?messageID=8274095

This may fix it for you...

-------------------------
Ok, I may have found a solution. (Leopard 10.5.5, fwiw)

The problem, according to some people in a different forum, may be related to the clock source of the USB box.

To fix this, I went into Apps/Utilities/Audio Midi Setup. In the Audiomenu there is an entry "Open Aggregate Device Editor". Click that.
In the dialog, click the + button at the bottom of the list, which was empty on my machine.
It will add a new device and in the bottom pane all the sound devicesin your computer will show up. Only check the ones you want to use (USBaudio). Then use the Clock radio button and select one of the USBdevices as the clock source (I used the output).
Click Done.
Now set your default input and output to "Aggregate Device".

That fixed it for me. YMMV, as always.

Posted on Nov 17, 2008

Siliconchip
  • 52 Answers

SOURCE: center speaker static noise

Sorry sp106s, you have to take that to bose service center.
Its a complicated problem. Something is wrong in the amplifier
section inside your sub box. Only authorize servicemen can
open it, not any tech'n can.

Good Luck

Posted on Dec 14, 2008

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1 Answer

I have an AKAI AM-A70 receiver that generates static when turning up the volume. Most of it is ok about around level 2 -3 I get some static. Probably in the knob.


It is indeed dust in the variable resistor behind the knob. If you can take the cover off the unit and gain access to this potentiometer

http://static1.1.sqspcdn.com/static/f/998672/20174496/1346944143963/ISA405+volume+control.jpg?token=fQ7uQo11HTgjbl7ifw1xp16%2FTUo%3D

give it a light spray with WD40 or similar.

Another method which sometimes works is simply to twiddle the knob back and forth many many times at the noisy spot.
.

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1 Answer

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It could be just a lead, check your lead heads and inserts are clean.
Check along your leads and wires for any obvious kinks / tight bends / cuts / nicks / something sitting down on it or any damage to the wires.

It could be there is another electrical device nearby interfering at a electromagnetic level.

It could be just the dials / knobs need taking off and cleaning in behind. the pickups, you may not need to remove them just spray with electronic cleaner b3203b06-4ced-4fda-befd-44f385f97b7e.jpg this stuff is great for lots of different electrical cleaning problems.
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Doesn't it have a squelch adjustment?(it allows you to adjust sensitivity of the "gate" on the receiver).Turn the knob counter-clockwise until it just goes quiet.The receiver will be silent until a transmission is detected.

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1 Answer

How do I eliminate static?


A lot of times when head phones of a head set have static it could mean that dust and/or water have gotten into the ear piece and the sound wave rattle around the gunk. that's about all i know.

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It means either the knob or something in the squelch circuit has gone bad. Doesn't mean that you cannot use the radio, you will just hear static all the time when no one is talking. If the static bothers you, you can always back the RF gain down a bit. That will quiet the noise, but lower you receive range. meaning you won't hear as far away.

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you have opened up the squelch - refer to the manual to close and return radio to normal operation

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Yes...adjust the squelch control. This is usually a knob adjacent to your volume control. This should eliminate the static noise and you will only hear audio when someone is transmitting.

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Normal, or static ip - It's the same address from day to day.

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Open the receiver and locate the potentiometer for the volume. There should be small openings in which you can spray electrical contact cleaner. The spray can be found at any electronic supply store (Radio Shack). Make sure the product says no or zero residue. I use a product called "Electrosolve". After spraying, immediately rotate the pot back and forth a few times. You may need to repeat this process two or three times. You might as well hit the other controls while you're at it. If several attempts don't eliminate the problem, the pot will need to be replaced.

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