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TV - picture on bottom of screen and lines on top

Have you found a solution to this problem?
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  • 92 Answers

Leaky electrolytic capacitors in the vertical deflection circuit.

Posted on Oct 09, 2008

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Wavy horizontal lines across the screen


It sounds that the main power supply section to your TV has the fault. The horizontal thik lines that appears crawling down across the screen should be of video 'HUM'. Have you replaced the main filter capacitor at the power supply section? If not, replace it along with the main rectifier. The AC power is rectifed by a bridge and applied ot this main filter capcitor. It will have a capacitance value between 120 to 350MFD 450VDC. Check this section. Measure the rectifed DC voltage acorss this main filter capacitor. It should be around 350VDC, if your home power supply line is 220VAC. If it is 110AC, this DC voltage will be around 165VDC; and it should be. If rectified DC voltage found lower than the input AC voltage, replace the rectifier bridge. In some sets, this bridge section have four diodes. Some other circuits, a bridge rectifier stalk may be used.

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LG Projection TV Model# RT-49NA11T Green color gun shows bent arc on top & bottom.Red & blue guns are ok.How to adjust the green gun to remove the bent arc. This is causing picture shows mix...


This problems ur tv have can't not be fix by adjustment.The tv have a problems known as convergence problems,it dead.Tv have colors lines R,G,B mis alignments,have colors shadow pictures or 3D pictures look alike?The tv convergence board have dead 2 STK convergence ICS and some or all of it resistors too.These parts on the tv convergence board,must be replaced to repair the tv convergence board to solved the tv convergence picture problems.The shop,will cost u like $300-350 for parts and labors.

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1 Answer

There's a picture on the screen, but it has lines all across it.Sometimes it will be clear, but most of the time it has lines. I also have directv, but they've installed a new box. Is this my television...


Hello
If the lines are there, and are across the screen at about an inch apart the whole screen from top to bottom, it is due to a slight increase in your TVs screen votage. It can be adjusted.
Open the back cover of your TV. There is an LOT [Line Output Transformer], can be seen directly soldered to the printed circuit boar of your TV. It is the largest component inside your TV, which have usually three wires emerging from it, and one thhick wire goes to the final anode of the picture tube, and will seem to be sticked to the top of the picture tube with the help of a rubber ******. Other two wires goes to the base card of the picture tube, a circuit board.
The said [LOT] has two controls integrated on it facing you as you open the TV. Among the top one is focus control, and the bottom one is screen control. Both of them are variable resistors, help to adjust focus and screen voltages respectively.
As set powered on, keeping the brightness, contrast and colour controls to its minimum, turn the screen control a little bit counterclockwise [not more, a little bit] will eleiminate the lines on your TV screen.
Take every precautions we have to, when working with an electrical equipment. Keep children away from you while you are working on it. Never allow them even to come beside you. Keep an adult beside you as a precautionary measure. Ok.
Wish you all sucess.

Oct 24, 2010 | Sanyo HT28745 28" TV

1 Answer

Horizontal lines across the top 3 inches of picture


Hi

what line started? from Left to right? or from top to bottom?

Thanks!

Nov 28, 2008 | Philips 32PT6441/37 32" TV

1 Answer

Hitachi 32" Plasma TV fault on screen thin pencil type line on left hand side of screen from top to bottom. Line thickness is approx 1mm TV is 5 years old Thanks Tom


iav a sky 42 inch plasma model number pd54250 when i swich it on i av got a green lined picture sometimes it comes on with a full picture can you help

Nov 22, 2008 | Televison & Video

2 Answers

Samsung hcl552w picture leans in on top and bottom


bad convergence ic's
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Jan 09, 2008 | Samsung HCL552W 55" Rear Projection...

1 Answer

3 curved lines top & bottom/blurred picture


This indicates a convergence problem..convergence power supply probally.. however ive seen 2 other cuicits cause this ..

Sep 24, 2007 | RCA HD52W59 HDTV Projection Television

1 Answer

Weird lines on the screen


Needs convergence circuit repair----give complete service # off
back so I can get part #...........T.

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2 Answers

Tv help!


When you have the back off, look for the flyback (high voltage) transformer. This is the part that has the thick red wire protruding from its top which attaches to the top of the picture tube with a suction cup. On the flyback there are 2 controls, the bottom one is screen and the top one is focus. Turn the bottom control (screen) down (counterclockwise) until the white lines go away and the brightness looks normal. Then turn the top control (focus) until the picture is nice and sharp. If the F connector has been pulled out and the TV has RCA (red, white, yellow) jacks, use those jacks and set the TV to INPUT.

Aug 13, 2007 | Zenith A27A11D 27" TV

1 Answer

White line


you have a shifted picture upwards the white line is the overlaped picture. Try accessingthe service menu and shift the picture down. Patrick

Jun 18, 2007 | Daewoo DSC-30W60N 30" TV

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