Question about Toshiba 36A40 36" TV

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Picture compressed into upper half of screen

The picture is compressed into the upper half of the screen when the set is first turned on. After a minute or so, it expands to fill the screen. I cannot find any horizontal/vertical adjustment.

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  • lpress Apr 22, 2008

    > This is not an adjustment.

    Don't most sets have adjustments to compensate for such changes with age?

    > Very often it can be a number of electrolytic
    capacitors.


    Is there any way to narrow it down?

    > An experienced TV tech can service this for you.

    Do you know of any Web sites that help folks find recommended repair people?

    > After the fix, the TV should work as normal.


    Do you it is worth fixing or would you expect this to be the tip of the iceberg? I like the set, but if other parts will be failing, it might be time to replace it.

    Thanks for your help!

    Larry

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  • Toshiba Master
  • 1,635 Answers

This is not an adjustment. There are some components that have become thermo sensitive with age and use. The fault is in the vertical deflection circuit area. Very often it can be a number of electrolytic capacitors.

An experienced TV tech can service this for you. After the fix, the TV should work as normal.

Jerry G.

Posted on Apr 22, 2008

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Read more about this kind of problem at:

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There is not much for me to go on with your description but here goes,

I suppose you have a convential TV set with a glass picture tube and not one of the new types with the large screen slim style displays!!!

If it a glass type picture tube then the following assumptions are made.

I hope yopu have not shifted house recently and moved the TV around???
If you have its possible the Yoke (its a device on the neck of the Picture tube that controls magnetically the scanning dot) may have moved and only is letting you see half a picture...
This is a long shot but it could be the cause..

Now the picture is supplied to you by a fast moving dot of light (Black & White set) that scans from the top of the picture and moves very fast down to the bottom of the screen, then flys back to the top of the screen and starts all over again during this process the dot lights up the picture tube to provide you with
the picture you see... (On a colour set there are three dots)

Its quite a complex process and its all controlled by electronics inside the TV receiver.

If you are getting only half a picture then something is causing the dot to only turn on for the lower half of the picture during its write time to the glass screen,

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Sometimes this sync pulse from the TV station is very weak and so your picture may float up and down the screen trying to lock to the incoming signal.. this just may be your fault.. but you dont say if the half of the picture that you see is floating or not..
Your situation may be that your TV has partially locked to the station signal and your aerial may be problematic,
but then you dont say if its on just the one channel or all of your station channels. So there needs to be more analysis of your situation prior to a positive answer being provided....

Sorry I can be of more help...

From YUBEUT...

.



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