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Buzzing coming from speakers

We have cable and we're getting a buzzing noise when we access channels above 23. Some channels are louder than others. I think it might be the IF coil, but I don't know where it is or how to fix it. Can you help.

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Re: buzzing coming from speakers

The "IF coil" is used for all channels, so if channel 5 is clear but 25 is not, the problem is not in the IF. If your IF coil was loose or bad, all channels would drift off and you would have no picture or sound. If you have the TV set to "SAP", some channels would have no sound at all, so I doubt that your settings are wrong. I suspect that the problem is with your cable signal, not your TV.

Posted on Sep 01, 2007

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Hi and welcome to FixYa,

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:
  • tuner - most unlikely, the tuner is responsible for selecting the channel. No component/part of the tuner could make such a mechanical buzzing sound;
  • speaker(s) - most unlikely, the speaker could have a buzz but generally would not affect the video nor cause snow (weak TV signals);
  • transformer - a strong possibility although without knowing the exact model, at most generic ideas; power transformer, flyback transformer, horizontal drive transformer (unlikely);
  • arcing - another strong possibility. This could be caused by damp, dusty surroundings of the components especially at the FBT area. Another area that could have adverse effect when dusty/damp would be the anode cap.
This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

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