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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.
Adjust colour control to zero, and check for a pure black/white picture. Adjust contrast and brightness control to minimum and check whether the picture goes completly off or a slight picture prevails. If the picture goes out when you turn down brightness control to 1/3 position, that is about 20 points, your TVs screen voltage is very low, and it can be adjustable. If the picture does not go out and more brightness prevails, screen voltage is high. If the screen voltage is high, there will be some fine lines across the screen at about an inch apart; on the whole screen from top to bottom.
Screen voltage adjustment is critical for the clarity of the picture. If it is low, no proper colour will be dispayed. If it is high, it is harmful to both picture tube and your eyes.
Never try to adjust it without proper knowledge about it. The screen control can be located alongwith the LOT [Line Output Transformer], of your tv. There will have two adjustable controls there, one is for Focus, and the other is for Screen. Both are interactive, that is adjusting one will effect an other.
My picture is too big for my screen also, I have a 27 inch screen and I can't see the scrolling tickers on the bottom and the baseball score readout on the top. When I turn the tv on, the heads are huge on the top and that finally comes into proportion, but it goes too far. I can't find a horozontal or vertical control in the manual or on the tv menu. What can I do?
1. A button on your remote that says either: ARC, Ratio, 16:9, 4:3.... Some remotes have a picture of a square with arrows pointing out towards each corner..... I'm unfamiliar with this set, but it sounds like a widescreen, so give it a go
There's a horizontal adjustment that needs to be made in the TV. If you feel mechanically inclined, you can take the back cover of the TV off (Be very careful with this. If this is a CRT (picture tube) then there is a capacitor at the top that has ALOT of stored energy.) You will see a couple of potentiometers (Looks like a little black wheel with a slot for a screwdriver). One of these will be the horizontal adjustment. Very slowly try to turn this until it adjusts.
If you give me the model number and brand of the TV I can try to find you a manual that will help you determine which one to adjust.
Sounds like you may have caps going bad . Adjusting may tend to only stretch the the picture too much . Also when you say horizontal are you saying the top and bottom are closing in ? If yes then your problem is in the vertical section . If side to side then check the horizontal section . Good luck
Your problem is not a vertical alighnment or size adjustment. No, Im sorry to say its the old vertical output IC and /or the small capacitors around the ic and in the vertical circuit. If you dont have the right tools, like a soldering iron a multimeter know how to read a schematic diagram, then you should seek out a repair person to assist you in this repair.