UPPER HALF OF SCREEN IS BLACK.
Bottom half of the screen is normal.
There is a white bright 1/2 inch horizontal line
(just in the middle of the screen) that separate
black upper half and normal bottom half.
This TV was bought in 2003.
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Re: SONY KV-27FV310: UPPER HALF OF SCREEN IS BLACK
You have a vert sweep problem and unless you know how to trouble shoot this cuircit bring it to a pro. I found out mostly in these sets that the vert output IC is bad.. Also sometimes the b+ filter cap off the fly is leaky and made the IC to fail. Another thing is Im surprised to hear you got a pic with the vert failure and a bright line in the pic!! This could be a big problem when the sets fixed so dont run it too long like this. It could burn a line all the way across the screen and you will see a dark faint line in your pic because of this. BE CAREFULL!!
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top half missing is in vertical circuit of set---if it is a 27 inch and this old consider retiring it and replacing----other option is consider having a shop repair it--a rough guess would be as high as 150 dollars parts and labor is possible for your problems.
you have a vertical problem it could be a cold solder joint on the vertical out put ic or a component failing in the circuit if you have the tools a soldering station and some know how you can fix this
or you may want to contact a local for help with it
I'm not familiar with this model of Sony, but the picture shows a CRT TV.
If this is so, your vertical deflection circuit has gone bad (it's nothing to do with the service menu).
This can be caused by bad capacitors in the vertical deflection circuit, a bac IC, bad power supply to the IC, bad solder connections, or a combination of any of the above.
In this case I would use a scope to test the circuit to see where to start from. You can always do a visual inspection to check for blown or burnt parts and bad solder connections. Other wise you'll have to have a sevice person look at it.
It's called a loss of vertical deflection. In this particular model your set uses a TDA8172 for a vertical Ic, at board position Ic561.
Replacing that and check or replace the feed cap out in front as needed should restore full deflection. It's not an expensive fix for a qualified shop either.. But my advice is take it into them and save the pu/del charges. And call around to see if they have the Ic on-hand and about how much it will be to replace it before choosing the shop to take it to..
Let me know how it goes!
sarge, it sounds like the vertical output IC went bad on you. If it was a bad connection or a bad capacitor, your picture would have been a straght line across the screen. They call the output section of the IC a push-pull type of amp, so the top half of the sweep IC went out. If you have had some soldering experience, and or experience with solid state repair, locating the bad IC and replacing it is no big deal. If you havent, stay safe and call in a pro to assist you in this repair, as there is alot of high voltage inside this puppy that is still present even if the set is unplugged. It should not cost an arm or a leg to repair this set. An honest repair on a set like this if you take it in should not exced 125 to 150 bucks. Good Luck
PS Please dont forget to rate this thread.
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.