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I have a sony lcd tv it's been 2 year's now that i have purchased it.in the middle of the screen there is a straight line,on the top of screen it is clear picture and on the bottom half its al

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

techman
  • 3130 Answers

SOURCE: 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!!

Posted on Mar 25, 2006

techman
  • 3130 Answers

SOURCE: Sony TV - Loss of half the picture

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.

Posted on Oct 22, 2006

  • 556 Answers

SOURCE: can only see half the picture

your problem is in vertical output section.

the ckt which is connected to vertical output section is called feedback ckt.

please check.

1 loose contact in feed back ckt.

2 mostly this problem is due to electrolytic capacitor failure.

3 vertical output  IC or transistor failure.

4 check for proper supply to vertical output.

5  low value resistor failure in v/output ckt  (.in rare case)

IF YOU ARE NOT TECH PERSON PLEASE TAKE HELP.

  1. hope this will help.

Posted on Oct 10, 2007

  • 1030 Answers

SOURCE: RCA HDTV blurry

this indications that you have a problem with convergence. first try to go into customer menu...setup....convergence. and see if the convergence will adjust.. if it wont then you have a problem with the convergence cuircit boards.

Posted on Dec 07, 2007

  • 1030 Answers

SOURCE: 3 curved lines top & bottom/blurred picture

This indicates a convergence problem..convergence power supply probally.. however ive seen 2 other cuicits cause this ..

Posted on Dec 07, 2007

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