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Scratchy sound when turn on and volumn

Scratchy sound when turnning on radio and turning up volume.

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A lot of good electrical stores and even automotive stores carry contact cleaner spray

This is wonderful for getting rid of scratchy volume controls as well as having other uses. Ideally you need access to the volume control itself which may mean opening up the case.
make sure the radio is unplugged and switched off for this.

spray in and around the control and operate the volume from one end to the other a few times.

leave it for a minute or two and reassemble it then power up and check your work.

Posted on Sep 07, 2009

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Sounds like a blown speaker

Posted on Sep 07, 2009

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1 Answer

The radio in my 1995 jeep grand cherokee plays full volume on the right channel when turned on.


  1. bad radio amp
  2. bad wiring to speakers.
  3. or bad speakers.
the tests are easy, ask.
my guess is the weak side is bad, the load side is ok.
you can turn the volume down on the load side using volumn control
if yes that side is ok, fix weak side.

ask how, but make sure the wiring in all 4 corners are not damage
and at both ends of harness.

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probably.
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Audio is very scratchy/static


If it makes a scratchy sound when the volume is turned up and down then the carbon contacts on the volume control are most likely the culprit you can attempt to clean them with rubbing alchol and a Q-tip.

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Use an electronic contact cleaner. You need to shoot it inside the pot through the openings. Then rotate many times. This will remove oxidation on the contacts inside. If you don't use a contact cleaner, turn of f the radio and rotate many times the potentiomer left-right-left-right ...When you turn it on again, you will see the scratcy sound will be reduced but it will come back eventually. The more often you rotate, the less noise it will make. This is a very common problem, nothing to worry about.

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When i turn the volume control on my panasonic portable radio it becomes very crackley. the sound is perfect but the crackling is annoying. Can the volumn control be cleaned. thank you. SH


go to radio shack near you and buy a contact cleaner(64-4315)----apply the contact cleaner in volume and move it forward and backward until you get good sound if this failed you must change volume control.

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