Question about Standard (CRT) Televisions

3 Answers

White lines across TV screeen

My TV has little white lines sort of like dashes across the entire width of
the screen. It runs across the heads of the people on the screen and looks like it will soon come down to the eyes

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  • etsubuc83 Aug 19, 2008

    I have the same model and the same problem.




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If these lines are just at the top of the picture then i would suspect an electrolytic capacitor in the vertical circuit.

Posted on May 08, 2008

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It's data attached to the video stream - closed captioning and the like - whic is always there even when you can't see it. In some TVs in some modes, seeing this is normal, even a feature. CRT and projection TVs: adjust vertical size or position. LCD/Plasma: feature or software flaw.

Posted on Jul 02, 2008

  • crapmail8976 Jul 02, 2008

    Worth noting that some cable systems incorrectly format this data, causing it to be displayed by a TV that id functioning normally. Of course, they'll deny this.

  • crapmail8976 Jul 02, 2008

    That is, of course, unless you have a continuous line and a CRT set. Then there's a flat cap in the vertical out. As a general shotgun assessment, replace all electrolytic capacitors in the vertical section and it will likely be fixed. Nothing to try if you're not electro-tinkering inclined.

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Well can this be fixed?

Posted on May 31, 2008

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1 Answer

My tv sony kv-xa21m61 display too bright and many horizontal lines. no picture


Vertical retrace lines is the problem. Thin white lines runs across the entire screen, at about an inch apart to each other. Check its video output supply voltage. Reduce the screen voltage to a little bit down and check. If you still wish to know more about this fault, check this site. Pull up older posts there.

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It is a calibration problem, let me see if I can find some schematics for your tv.

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WHEN i TURN THIS TV ON, ALL I GET IS A WHITE LINE, ON THE SCREEEN, WHAT MIGHT BE THE FIX?


A bright white line across the middle of the screen indicates vertical sweep output failure. Check and repalce dmaged component/s in the vertical output section circuit. Check for any loose solder terminals around the the vertical output section circuit. Visit the site named 'Electro-help' for more details. Click this link. View it in "Timeslide" or "Flipcard" option, which can be selected from the drop down box menu by the [Sidebar] tag, at the top left corner of the display window. It will make search easy. There are more than 1100 posts to different brand TVs now. Pull up older posts there.

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1 Answer

When ever there is some strong white on the screen it gets distored. For example. There was a white tent on screen and where the light was hitting it it was extremely pixelated and distorted. Ny ideas?


Hello
This fault can occur to mainly three reasons. ABL circuit failure. Low screen voltage or lack of emission from picture tube cathode. Just advance the screen voltage to a little, and observe the result. Screen control can be located on its Line Output Transformer [LOT]. there will be two variable controls built on to LOT marked as screen and focus. Screen control will be at lower side, and focus will bw on the top. Just advance [clockwise movemnt] to a little, not more, advance it till retrace lines are just visible on the screen. Before doing this, set all the picture controls, contrast, colour and brightness of the TV to zero. Once the retrace lines[thin horozontal white lines across the entire screen at about 1 inch distance with each other]; are visible, stop there, turn the screen control counterclockwise to just a point when these lines are just goes off. make this adjustment in a dark room so that you can set this point very correct. After this check the perfomance of the picture. If this does not help you, ABL circuit should be checked for any fault.
If emission of the picture tube has got down, even the screen adjustment said above won't help you. The only way is to replace the picture tube with same type and number. OK.

Apr 16, 2011 | Sanyo DS24424 24" TV

1 Answer

Thin white line across middle of screeen


i would say it might be an indication of the screen going bad or the controls on the inside of the tv need to be adjusted.good luck

Nov 24, 2010 | Sanyo DS35510 35" TV

1 Answer

SAmsung has two white lines across screen with no picture


If the 2 white lines are in the centre of the screen it sounds like you have a fault called 'field collapse' . The 'x' or horizontal circuit on the tv deflects the beam across the screen which in your case is ok because the line runs across the screen ok. The 'y' or field circuit on the tv deflects the beam down the screen. Without a circuit diagram for your tv i cannot point to individual components.

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1 Answer

White Vertical Lines Across the whole Screen


the trouble of your tv is the color section try to fine the capasitor which is the value is 4.7/250volt or any as long as its a 250 volts

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