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Buzzing sound through the speakers effecting all input components

Posted by tomlinson_ca on

  • Jim Chinnery
    Jim Chinnery Apr 19, 2012

    The buzz is probably caused by bad earthing,
    The earth return is through screws holding the printed circuit board to the case.
    Take out any screw that goes through a metal connector on the circuit board. Clean the screw with a wire brush, clean the connection point on the circuit board and where the screw goes into the case.
    Before you put the screws back squirt some wd40 or or put some vaselene on them and tighten them, it will help stop the dust from making a bad contact.

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Jim Chinnery

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The buzz is probably caused by bad earthing,

    • If the earth return is through screws holding the printed circuit board to the case.
      Take out any screw that goes through a metal connector on the circuit board. Clean the screw with a wire brush, clean the connection point on the circuit board and where the screw goes into the case.
      Before you put the screws back squirt some wd40 or or put some vaselene on them and tighten them, it will help stop the dust from making a bad contact.

Posted on Apr 19, 2012

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Hello

The buzzing sound that you have mentioned may be due to following reasons.

  • The power supply may be internally producing spark or power lines are damaged.
  • There may be some connector which is not connected properly. Check the connectors which connect the speakers to the audio system.
  • Any of the connector may be damaged. Again check the connectors.
  • Check your power supply.There may be some sparking or adapter not connected properly.
  • If these are not your solution then your connectors are damaged internally.
Hope this will solve your problem.

Thank you

Posted on Aug 16, 2009

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2 Answers

What causes buzzing in speakers?


There are many causes of buzz, so it should be checked step by step :
- Bad connection on the input connector, or cord.
- Amplifier, basically have the block diagram like this:
25850676-l1qpqmriditabltrjczr2eku-5-0.jpg If in one block damage, buzz can be heard.In the amplifier.
Generally occurs in the PSU and / or power amplifiers.
Fix it to the experts,because it requires a good knowledge of electronics.
Blown speaker cone, does not cause a buzz.
Short circuit along the wires supplying the audio, it will not cause any sound in the speakers, including the sound of music.
Try also, disconnect the input connector, whether the buzz is still audible. If after the input connector is removed, the buzz disappears, the possibility of buzz came from another device before the amplifier.

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What would cause a buzz in speakers?


There are many causes of buzz, so it should be checked step by step :
- Bad connection on the input connector, or cord.
- Amplifier, basically have the block diagram like this. View image.25850665-l1qpqmriditabltrjczr2eku-2-0.jpg
If in one block damage, buzz can be heard.In the amplifier.
Generally occurs in the PSU and / or power amplifiers.
Fix it to the experts,because it requires a good knowledge of electronics.
Blown speaker cone, does not cause a buzz.
Short circuit along the wires supplying the audio, it will not cause any sound in the speakers, including the sound of music.
Try also, disconnect the input connector, whether the buzz is still audible. If after the input connector is removed, the buzz disappears, the possibility of buzz came from another device before the amplifier.

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Initially, if you have confirmed that the source of the buzzing sound is from inside the TV, then that would indicate a component about to fail or would need attention. Let us try process of elimination:
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