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Screen has a band on top part

I have an old console TV. It says LXI behind the door. The screen has a band on top part of it. It is not black, you can see through it. It sometimes makes words or pictures look upside down

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The way that you are describing your problem it seem to be vertical foldover. this problem is in your vertical output and feedback circuits.check the vertical output transistor,ic, and yoke coupling capacitor. also check capacitors that could be out in your vertical bias and feed back circuits. an esr will do this in no time. the easiest way that i have found to check capacitors without removing them or even turning the board over is to get some alligator clamps and clamp one end to your esr and the other end to a wire and measure the cap. this way you will be able to read the cap and measure at the same time. also check resistors and transistors using the same method for hard to reach components. please rate my solution if it helped. thank you

Posted on Nov 13, 2009

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Posted on Jan 02, 2017

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1 Answer

How to change from analog to digital


If you have an old analogue TV and wish to keep it, buy a digital set top box (which is just a digital tuner with no screen), then connect the antenna and TV to that. These STBs are quite cheap, and a good name brand will give you an excellent picture, with one qualification.

This is that the old analogue TVs have a screen proportion of 4:3, whereas the digital broadcasts are 16:9. So by keeping an old screen you will lose a bit of the picture at each side, or see a black band at top and bottom.

If you don't like that, you will need to buy a flat-screen (digital) TV and toss out the old one. There is a huge range of sizes and prices, so if you look for a special from a recognised retailer who will stand by the warranty, you would be OK.

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if that 2 band according to you from top to bottom,it has a defective vertical stage.if this two band appears one on top and one at the bottom,it`s on vertical stage.leaky capacitors,resistance changed or resistor devalued ang ic`s, are too weak to amplify a signal to make the screen complete....

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Black box on screen


Without a picture of it it's hard to say what you mean. Sometimes on a CRT TV the vertical scan doesn't fill the screen, but that would cause a black band both top and bottom. The usual cause is a capacitor drying out. But only a qualified tech should look into that.

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Thats your midddle driver board on the botton m8.

Try the technique on this video if that doesn't work ,replace the board by with another of the same part number.Cheap to buy.Ebay.LCDTV Spares shops online

http://www.youtube.com/watch?v=9NPobj0_GSo

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http://www.mitsubishi-tv.com/support.html
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while i dont have a true answer, I can tell you its a magnavox tv sold by sears produced back in 93. Ours just started doing this last week. I couldnt find any help online so we replaced it with a new led flat panel. WOW what a difference, the LXI was great for the past 17 years but the new tvs are better. We put the LXI in the garage because we couldnt throw it away. That tv was like a family member, if i figure out how to fix it i will post the how to.

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