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I am getting small vertical line on my sansui fontes LCD.

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  • Sandesh sawant
    Sandesh sawant Jul 21, 2015

    How can I fix it. can you please guide

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Vertical lines are either from your LCD Panel or LVDS Cable

Posted on May 15, 2014

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Vertical line in my 32 inch Sansui flat screen in my REV motorhome. Left side of TV. Bluish in color


If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Oct 17, 2016 | Sansui Televison & Video

1 Answer

My sansui sv2981 tv it has a sound but there's not pic, thares a line in between the screen going horizontal on that small line u can see pics on ppl bt its so small. Please help


Sounds like vertical sweep output section circuit fault. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Type in this key phrase " my service table today " in the search box at the top right of the display window, to get gathered some pages which has the details of practical experiences to the author of that site with similar faults that he have repaired.

Aug 26, 2015 | Sansui Televison & Video

1 Answer

Tv not showing picture but just horizontal line.


Failure of vertical output. Check vertical output components.

Jul 06, 2010 | Sansui DTV2760 27" TV

1 Answer

I have a 55 in Sony Grand Wega LCD TV that has some strange lines that look like cobwebs. They seem to be floating behind screen. What could it be? The TV is 6 years old


hello,
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A single horizontal line means that you have lost vertical deflection. High voltage is most likely fine since there is something on the screen.

This could be due to:

Dirty service switch contacts. There is often a small switch located inside on the main board or perhaps accessible from the back. This is used during setup to set the color background levels.
may be a jumper plug or other means of selecting service mode - not an actual switch.

When moved to the 'service' position, it kills vertical deflection and video to the Tube. If the switch somehow changed position or got dirty or corroded contacts, you will have this symptom. Flip the switch back and forth a couple of times. If there is some change, then replace, clean, resolder, or even bypass it as appropriate.

Bad connection to deflection ports or other parts in vertical output circuit. Bad connections are common in TVs and monitors. Check around the pins of large components like transformers, power transistors and resistors, or connectors for hairline cracks in the solder. Reseat internal connectors. Check particularly around the connector to the deflection ports on the Tubes.

Bad vertical deflection IC or transistor. You will probably need the service manual for this and the following. However, if the vertical deflection is done with an IC, the ECG Semiconductor Master Substitution guide may have its pinout which may be enough to test it with a scope.

Other bad parts in vertical deflection circuit though there are not that many parts that would kill the deflection entirely.

Loss of power to vertical deflection circuits. Check for blown fusable resistors/fuses and bad connections.

Loss of vertical oscillator or vertical drive signals.

The most likely possibilities are in the deflection output stage or bad connections to the yoke.


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