Question about Sony FD Trinitron WEGA KV-32FS100 32" TV

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Half Picture We can only see the bottom half of the picture. The top part of the screen in black.

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Re: Half Picture

I have seen this caused by 2 different problems. The vertical output IC could be bad but it is usually the CXA jungle IC that fails to cause this. Either way the set should be serviced by someone experienced in repairing Sony TV's.

Posted on Aug 10, 2007

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The top half of the screen is at the bottom...and the bottom half is at the top of the screen...theres a black line through the middle...why is this happening please...

The fault is with its vertical scan output stage circuit. Contact any service technician. This is not a user reparable fault. [Out of Sync: picture].
Gopakumar Gopalan Google

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I have a 27" TCL 29T18. The top half of the screen went black and the bottom half has the top half of the picture. Help please!!

1-to solder vertical integrated circuit 2-see if any electrolitic filter is blow up-or 3-verify +24vcc 4-replace all electrolitic-filters.

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check the verticle stage
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TV Keeps flashing Fuzzy black and white static then the picture appears

The half picture is a verticale problem. This is difficult to repair. Send to a repair shop.

Jul 19, 2008 | Sony KV-36XBR450 36" TV

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Model 42mf231d/17 42" plasma

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

Jun 04, 2008 | Philips Magnavox 27MS343S 27" TV

2 Answers

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...


Nov 10, 2007 | GE 31GT660 TV

1 Answer

Top half of screen black

The vertical circuit is going bad,this is the one in charge of opening the picture up and down,try taping on the side to see if the picture reacts ,if it does your set has a loose conection and the vertical IC will need to be resoldered only but if it does not react the IC will have to be replaced,if you are familiar with tv service this will give you a place to start but if you are not be safe and seek the help of a servicer,please let Us know how it goes.

Oct 11, 2006 | Sony KV-XA34M66 34" TV

1 Answer

Half a screen

The picture on your TV screen is driven from the center to the top and bottom of the screen by the vertical drive circuit. The fact that you can see the entire picture means you have a problem called foldover. This is caused by a failure in the vertical drive circuit where the vertical saw signal is altered by a component failure within the vertical drive circuit. You cannot solve this problem but any good repair shop should be able to correct the problem at a reasonable cost.

Jun 22, 2006 | Sony FD Trinitron WEGA KD-32FS130 32" TV

1 Answer

Screen split with black bar through center, top of picture shows in bottom

It sounds as you desribe, the vertical output IC and or the b+ feed capacitor off the Hi voltage transformer feeding the vert. IC its required voltage. Not a really hard job to replace, but not for a handi person to do. This should be left to the professional, as there are no user serviceable parts inside this set and with the HI voltage and the safety issues its best to call somesone to assist you with this repair. Good Luck

Jun 14, 2006 | Sanyo DS31520 31" TV

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