Zooming??

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haugs32
haugs32's picture
Zooming??

Hello, my tv does not allow me to see the outside edges... For example when watching ESPN I am unable to see the bottom "ticker" that scrolls across the bottom of the screen.. I have tried using the menu options, but so far I am stumped. Any help would be greatly apreciated.
Thanks

gitmomike
gitmomike's picture
How old is your TV? I have

How old is your TV? I have the same problem on one of mine, the TV is like 20 years old though.
The one thing that I noticed is the glass tube "bulges out" further than more modern tubes. Maybe that has something to do with it.

Matt Whitlock
Matt Whitlock's picture
Great observations.haugs32,

Great observations.

haugs32, if you have a newer digital TV, you may have the TV in the wrong format mode. Not seeing the ticker at all makes me think this is your problem, but without knowing what kind of TV you have, it's hard to be helpful.

gitmomike, it is common for TVs to overscan the image by 3-4% in order to hide strange stuff that can occur around the outside edge of the image, as well as ensure that the picture fills the screen properly.

Older tubes that are rounded would normally overscan a little more than average... usually around 5%. However, as the TV ages, the way the image is displayed can get out of whack. Plus, image blooming caused by inadequate voltage from the power supply can make it worse.

For example, my 1986 Zenith tube has the same problem that each of you face:



Notice that the top and left side of the screen is cutting off some of the picture.



When I put up an overscan test, you can see that nearly 10% of the image is being cut off the top and left side. Anything over 6% or so starts to become pretty obvious with much of today's programming.



This image is from the overscan bounce test, which shows that some of the overscan is caused by blooming. If so, reducing the contrast or picture control could help alleviate some of the problem.

I've already reduced contrast on my display as low as it can go, but it is still blooming; a common problem for older sets, and those with weak power supplies. A professional may be able to adjust the overscan some, but usually such a service would cost more than it's worth. Otherwise, there's not much else you can easily do.

I hope you found this useful.

zdave
zdave's picture
high voltage too high can

high voltage too high can also couse this problem.
qulified tech can and should be able to help you.

haugs32
haugs32's picture
Thanks for your help... I

Thanks for your help... I guess it is time to get a new TV... The one I am having trouble with is at least 8 years old...

 

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