Question about Standard (CRT) Televisions

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Quasar television motor buzzing sound, makes squiggly lines on tv. When the noise stops the picture on the tv is good.

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  • teresachilds Dec 06, 2008

    The back of the tv was very very dusty when I removed the back, however, I dust of as much of the dust without distroying any components or connections. Also the loud buzzing noise seems to do it more frequently on higher channels. Example on channel 43-cable the noise comes in goes every 5 seconds but the lower channels such as 15-cable only has some noise and not very frequent.

    I will dust more off especially around the FBT area or anode cap and see what happens and will get back at you with what is going on.

    Thank you for your help

    Teresa

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Hi and welcome to FixYa,

Appreciate the direct "Ask Me". I actually replied to your other post here. Pls find below proposed diagnosis.

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.

Posted on Nov 26, 2008

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  • 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);
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