Question about Emerson EWF2704 TV

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How do you fix vertical hold

Tv is rolling

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  • amp1249 Aug 02, 2008




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Please contact the nearest repair shop.

Posted on Aug 01, 2008


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1 Answer

Picture is rolling

In the old days there was a control at the back of every tv labelled "vertical hold" that needed adjustment when the picture rolled. As tv sets became better that control was at first moved inside the cabinet and then finally deleted.

The vertical hold controlled the amount of synchronising signal (that is extracted from the signal received from the antenna) reached the frame oscillator. Today's electronics are so stable the vertical and horizontal synchronisation is automatic so while sometimes a rolling picture can be caused by a bad signal it almost invariably caused by an internal electronic fault needing the attention of an engineer.

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If the vertical hold control have no effect, and can't stop vertical rolling, the vertical oscillator side should be checked. Check the hold control too, if any.

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Wow 5 months without a solution. NOT GOOD.. Well I hope I can help...
This sounds like a vertical hold problem, and is normally easy to fix.... There should be a couple of nob's on the lower back of the TV. One for vertical and one for Horizontal hold. You need to find the vertical hold nob and adjust it, until the rolling stops and stabilizes. If however these nob's are not visible you will have to take TV to an engineer to fix it.
Hope this helps..

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unfortunatly no. the vert hold is set by black bars at the top/bottom of the video signal (outside of the viewable area). it sounds like your VCR or tape is damaged.

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well most of the modern tv today doesnt have vertical hold anymore. this symptom is caused by a trouble in the IC integrated circuit or the vertical oscillator circuit. let the service guy do the job if u dont know anything about this. good luck!

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Horizontal roll on mitusbishi 35" tv

is this a horizontal black line going up or down? if yes, this sympton is caused by a trouble in the integrated circuit or in the vertical oscillator circuit. this symptons has 2 variations. one is the intermittent rolling of the picture. this referred to as the "loose vertical hold" the other variations is the continuous upward or downward rolling of the picture

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