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The volume is noisy to a certain point.

The volume crackles and is very noisy to a certain point but when it goes beyond that point it seems ok, do I need a new volume pot and how do I get the part. Martin, Ireland.

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Try to clean the vol. control with some elctronics parts cleaner, it comes in an aresol and you spray it into the pot, the crackling is dust or dirt in the potentiometer<pot> this is a common problem on older machines that havent been used in a while or live in a dirty enviorment.

Posted on Jan 03, 2009

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Panasonic sa-pt860 speakers crackling


Panasonic SC PT860 Manuals
The above link is the owner's manual - it may help.
Here are some other ideas:
Try to find out if the crackling sound is coming from all speakers or just one - you may just have one bad speaker.
If the crackling happens at high volume settings, you may be overdriving the system - you'll just have to turn it down!
Try turning down the bass or the subwoofer level.
Is the crackling present with all sources (TV, cable, DVD, bluetooth)?

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+ to + and - to - on the amplifier.

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I have a Sony DAV S500 AV system and with certain DVD and with the volumn just over 20 (not really that loud), the system shuts down and PROTECT shows in the message window. I read somewhere on the web...


If the subwoofer and other speakers were included with the system, THAT is what they're designed for. Mixing and matching with other products is usually discouraged if not forbidden.

http://audio.manualsonline.com/search.html?q=Sony+DAV-S500

If the problem returns with connection of the sub it may be defective or on its way out. Internal damage to the voice coil from being overdriven could have melted or worn through the insulation and it would cause intermittent undesired electrical contact or load variation under certain conditions, like high volumes.

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1 Answer

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You might also try using the opposite input (TRS vs XLR) than the one you're using. It might reveal something.

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1 Answer

On my Sony Surround Sound tuner, if I raise the volume up to a certain level (not that loud), I get a flashing sign ''protect'' and the sound to the speakers are cut.


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1 - Checking for DC voltages on the outputs to speakers. Not your particular problem.

2 - Excessive current being drawn from receiver on one or more of the speakers.

Number 2 should be your starting point in finding a solution. Put the volume level on Medium - 35 to 40 on the front panel. Now listen to all you speakers in turn. Any scratching noise will indicate a defective speaker. Remove this speaker from the receiver output and check again if the set goes into protection on high volume.

If you could not find any strange noises on the speakers, remove them one by one and test the set on high volume.

Never - attempt to disengage the protection on this amplifier. The only times we have found the amplifier to be defective with this protection error, it has done so no matter the volume level. Therefore I believe your problem to be a speaker or speakers.

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