Experiencing a "creeping" problem. Originally started at two thin lines at the very top of the screen, which would distort the picture a little (top 1/2 inch of the screen. I now have about ten thin lines that are thinly distributed among the top three inches of the screen display. It seems to be drifting down through the picture with additional distortion lines in the viewing area. The picture display becomes inverted in this affected area of the screen. The TV is about two years old - and it would be a shame to "just go buy a new one".
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Re: 32Inch Flat Screen SDTV - with picture distortion
If you have a TV shop at all any more in your area, any tech working on them will know where to look. This is a pretty common problem although you are getting it too early.
Since it will require a certain type of instrument (capacitance meter) to verify the problem part, I don't want to go into detail concerning a 'do-it-yourself' repair since it may be a little difficult to order these in single quantities and a decent shop should have the right value on hand.
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Problem in vertical circuit--look for the vertical chip to have bad or broken solder connections....see typical one (usually mounted to metal)...... usually anything from 7-13 pins and almost all are flat like this one-secured with screw at top to metal plate.
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.
Set the brightness, contrast and colour control of that TV to minimum. Watch it in a dark room whether ther are thin white lines across the screen, at about an inch apart, from bottom to top of the screen. If there are lines, that TV needs screen control adjustments. That is, now the screen voltage given to the picture tube went high to some reasons. If you have confidence that you can adjust it, I will guide you.
Open the back cover of that TV. Locate the LOT [Line output Transformer], usually one red thick wire is connected to the top of the picture tube with the help of a rubber ****** and clip. In most TVs it can be located and can be seen as the back cover opened. There are two variable control, fitted, integrated to LOT. Normally the upper one is marked as focus, and the lower one is marked as screen. You shoud adjust this control to avoid these lines.
It is a live service, that is the TV must be switched on during this time, and take causion in every respect not hurt by yoursef and the TV. Keep the children away from you, and an other adult person beside you is better. A liitle turn counterclockwise will remove this problem.
You have vertical output problems.There is distortion at the top because of a faulty vert. output i.c. or a faulty electrolytic capacitor.It's possible there may be a problem at your yoke also.It needs a professional repair.
Originally when 16:9 TVs were produced movies were being shot in 16:9 so that you had a full screen. Now they are being shot in 14:9 as it gives you a more cinematic experience. This is due to the fact that colours look more vibrant when they are placed against a colourless/lightless surface (such as a black panel) as for the bars on the side of the screen LuciferStarr is correct; it depends on the format in which the video was originally produced. For example most older television shows are still shown in 4:3 but newer shows and movies are produced in the widescreen format.
The problem you are having is a vertical deflection problem. The screen is being compressed to a thin white line. It's probably a defective vertical output module or transistor. This part is not too expensive. Less likely would be a vertical deflection coil, which would be more expensive because its usually glued to the picture tube and harder to replace. You'll need to take your set to service center to have it serviced.
Please let me know if I can be of further assistance to you.
If the thin white line you mention is crossing the screen from left to right, your tv is experiencing what is called "vertical collapse". That is a very common problem that is repairable and may be as simple as a few solder connections to replacement of the vertical output IC and a few capacitors. If you can find a qualified shop, take it in and it shouldn't cost much more than $100 to get it fixed.
I suspect you originally had an intermittent solder connection on the convergence circuit board. This may have damaged the convergence IC's on that board by now if repairing those connections doesn't fix the set.