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crt tv horizontal display problem

Discussion in 'Troubleshooting and Repair' started by walid ahmed, Aug 12, 2017.

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  1. walid ahmed

    walid ahmed

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    Aug 12, 2017
    The crt tv cant display horizontally. The HOT and yoke coils are ok.....when horizontal yoke coil connected then the tv dont turn on...when removed then it ONs.
     
  2. davenn

    davenn Moderator

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    Sep 5, 2009
    things like the make and model of TV would be really helpful if you want some one to help you

    have you googled for service manual or at least a schematic ?
     
  3. walid ahmed

    walid ahmed

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    Aug 12, 2017
    the model of the pcb is ZR-818B-PCB a chineese normal commercial pcb
     
  4. kellys_eye

    kellys_eye

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    Jun 25, 2010
    We need the make and model of the TV set, not the pcb.
     
  5. walid ahmed

    walid ahmed

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    Aug 12, 2017
    i replaced with best HOT. and driver transistor also...but when horizontal yoke connected only then tv didnt turn on
     
  6. walid ahmed

    walid ahmed

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    Aug 12, 2017
    the tv set is different with the pcb.....a different crt and universal chineese pcb there
     
    Last edited: Aug 13, 2017
  7. walid ahmed

    walid ahmed

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    Aug 12, 2017
    so the tv model will not do to identify the present pcb connected
     
    Last edited: Aug 13, 2017
  8. kellys_eye

    kellys_eye

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    Jun 25, 2010
    Without a schematic to reference to what do you expect us to advise? Or should we just guess? I can't find any reference to match the details you have already given. Unless you can show us a picture of the board or the diagram we're pretty much in the dark.

    Have you checked the sync pulses to the board?
     
    walid ahmed likes this.
  9. debe

    debe

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    64
    Oct 15, 2011
    I guess if you are using a PCB that wasn't meant for that deflection yoke then theres a mismatch, & it wont work
     
    davenn likes this.
  10. davenn

    davenn Moderator

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    Sep 5, 2009
    thread closed

    @walid ahmed when you are able to supply make and model of the TV you are working on
    PM me and I will reopen the thread

    There is no point in all of us playing 20 questions if you are not going to supply the needed info
     
    walid ahmed likes this.
  11. walid ahmed

    walid ahmed

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    Aug 12, 2017
    Ok dear...i failed to give u any info about the tv....close the thread and just tell if the horz shorted yoke can prevent the tv to turn on?
     
  12. kellys_eye

    kellys_eye

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    Jun 25, 2010
    If the horizontal yoke is shorted it will cause an overload of the power supply and shut the set down.
     
    walid ahmed likes this.
  13. walid ahmed

    walid ahmed

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    Aug 12, 2017
    You r great!!!!thanks sir.
     
    Last edited: Aug 15, 2017
  14. walid ahmed

    walid ahmed

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    Aug 12, 2017
    Can it cause the picture tube to dont turn on?
     
  15. shrtrnd

    shrtrnd

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    Jan 15, 2010
    If the filament at the neck of the picture tube lights-up, the picture tube is on.
    The yoke is a separate circuit.
     
  16. 73's de Edd

    73's de Edd

    2,841
    1,207
    Aug 21, 2015
    Sir walid ahmed . . . . .

    You say . . .
    The crt tv cant display horizontally.

    This pic below is showing a problem with the sets HORIZONTAL CIRCUITRY or the yoke
    A quite rarely occurring condition . . . . .

    [​IMG]
    If you have the MUCH MORE COMMON problem, where the bright white line will be ACROSS the screen from left to right, instead of UP and DOWN, as is shown in my 1st picture.
    THAT will be a VERTICAL problem.

    Now which is it.?

    Also, does the sound always remain on ?

    You say . . .
    The HOT and yoke coils are ok.....when horizontal yoke coil connected then the tv dont turn on...when removed then it ONs.

    Are the hoz and yoke connections being SEPARATE . . . . two pin . . . . plug in connectors ?.


    73's de Edd
     
    Last edited by a moderator: Aug 16, 2017
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