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How Cathode ray tube televison set work?

Discussion in 'General Electronics Discussion' started by Robo29, Nov 28, 2016.

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  1. Robo29

    Robo29

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    Nov 28, 2016
    Hello,
    i have opened my tv set it has pcb circuit with cathode ray tube.
    please tell how this work why so many wires are here?
     

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  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,473
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    Jan 21, 2010
    What you are looking at is the back of a very large vacuum tube. The bits you're looking at are the low voltage connections. You'll probably only find voltages of a couple of hundred volts here.

    The back end of a colour picture tube has three electron guns, connections for various elements which focus the beams and coils which generate magnetic fields to deflect those beams.

    On the side of the tube closer to the front week be a connector for several tens of kV.

    Many of these connections can have voltages which can give you a really bad day. These voltages in some cases can persist for a long time after power is removed.

    Why do you think you have a problem with the picture tube and why do you want to try to fix it?
     
  3. Robo29

    Robo29

    14
    0
    Nov 28, 2016
    where please mark.
    it is working i want to learn and want to connect embedded system with it can we do this?
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,473
    2,819
    Jan 21, 2010
    Inside the neck.

    I guess anything is possible but it would be far easier to generate a modulated signal than trying to interface to the tube directly.

    A mid point would be to bypass the tuner, but that's as far as I'd go.
     
  5. Robo29

    Robo29

    14
    0
    Nov 28, 2016
    i am not getting pls mark in image of it..
     
  6. davenn

    davenn Moderator

    13,765
    1,920
    Sep 5, 2009
    google it !!!


    thread closed
     
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