Question about JVC AV-27230 27" TV

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Picture partially cropped at bottom of screen

When a weather advisroy scrolls along the bottom of my tv, the top half of the message is cut off so it can't be read.

There doesn't appear to be any way to "shrink" the picture so it all fits on the screen.

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Re: Picture partially cropped at bottom of screen

Normallly, if the picture size button on the remote for the television does not achieve the desired affect, then, a cable box or a satelite box is where the change needs to be made.
For example:
A Motorola Cable box needs to be set up to go to a wide screen or zoom when an analog signal is detected.
Some Dish Network boxes have Size buttons on their remotes and also in their main menu.
It's difficult to determine the repair without knowing the types of the peripherals.
Hope this helps.

Posted on Dec 24, 2007

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Re: Picture partially cropped at bottom of screen

I have an Sharp Aquos 45D65U TV and had the same problem. Turns out somebody had pressed the "View Mode" button on the remote and set it to Zoom. Don't know if you have the capability to change these settings using your TV remote but thought I would pass this along just in case.

Posted on May 02, 2009

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This is a problem with the vertical circuit and can be as simple as poor solder connections within that circuit or defective parts. If you have no experience with soldering or TVs, this should go to a service shop. Expect a parts cost in the $30-$40 range for and IC +/or capacitors. If you'd like to attempt this yourself, please supply the exact make and model so I can post the parts required along with additional instructions. Please note that TVs contain potentially dangerous high voltages even when unplugged.


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If the loss of picture is either on top half or bottom half of screen. there are y buffer boards that go from top to bottom on left side of screen when looking at back that control those sections. when there is loss of half of picture then buffer associated with that area would be at fault and would need to be replaced. when i see a degrading symptom such as loss of picture on top half or bottom half leading to no picture issue normally you would check heat syncs on y sustain board and if not heating up after a few minutes of being turned on would recommend replacing y main and both y upper and lower y buffer boards as they complete a circuit

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The TV is only showing half of the picture

Hi Bigtate,

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,

You dont say if the half thats off is white or black, so there are many things that the service technician needs to know before even starting to look for this fault. During the dot doing its write cycle down the sceen, when it reachs the bottom and flys back to the top of the screen it receives a synchronous pulse from the TV station, and this TV signal is critical in making sure you see the same picture as is being sent from the TV station.
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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Picture not fitting on screen

if your tv has a warranty take it back to where you you bought it.or check if your remote has the zoom feature,if it does zoom it back.or else you will have to call the repair man to program it for you.

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