Question about Sony KP-48V80 48" Rear Projection Television

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Sony tv model no. KV - 19 APR 2

Pls. help me fix this sony tv. only reddish horizontal line appear on the screen. pls tell me what to check or repaced, the vertical IC is UPC1488H. i already replaced all electrolytic capacitor around the vertical IC but still i doesnt work.

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This is for a different model, but I had thin horizontal lines in red and had to adjust the tube for red. You may have a similar adjustment on your set.

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

Posted on Aug 14, 2008

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1 Answer

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I would look for a Vertical circuit failure. Most likely is the vertical output IC and or open resistor off the hv transformer. Definitely look for any loose solder connections around the Vertical output IC.
Hope this helps,
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+13 & -13 requires for Vertical Deflection IC and produced by Flyback Transformer, these volts will be produced IF Horizontal deflection circuit works properly. so try to check H-Out Transistor and its necessary volts / signal. Pls also mention correct Model Number to provide you more help.

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The probable defective part is the vertical IC. If changing that does not resolve the problem, check the capacitors in the same circuit. Also, check for the proper voltages at the vertical IC. If the IC is not being fed its power, it won't work either. I don't have a listing for your specific model. If you can post the vertical IC part number (LA7837 for example), I can list the voltages per pin.
Dan

Apr 09, 2008 | Televison & Video

1 Answer

Picture problem


Aside from the parts you mentioned check the vertical connection to the yoke (usually yellow and green wires), it may have a cracked solder joint or it could be burned. Also check the yoke for a broken vertical winding.
If the line is yellow with no other colors you may also have a bad color gun or drive transistor. If all color guns are working the line should be white.

Mar 14, 2008 | Televison & Video

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I have horizontal white lines across the display of my LCD Tv, I've included more info in the details section below I have an Insignia model# NS-46L780A12 LCD TV MFG date July, 2011 , recently the display has been acting very strangely because the issue comes and goes consistently dependent to whether or not there's caption writing on the screen - examples being programming information , channel , time etc.....these info blocks are each in their own particular areas on the display , where this gets odd is when your watching live TV ,these info blocks are always filled in with whichever program that's on, the best description of this issue is from these individual blocks of written captions on the screen example - from the top , there will be a continuous vertical row of horizontal lines starting directly underneath said caption all the way to the bottom , this will happen consistently wherever there happens to be writing on the screens display, so you get multiple rows of these horizontal lines from top to bottom of the display and they'll stay there for the entire time you watch your show , some shows have more ,some less ,depending on the writing for that show , this is all on cable TV / live TV I guess you can call it , and when I use my Fire TV stick with certain apps , I'll get no vertical rows horizontal white lines on the display with the exception that I push the mute button or change the level of the volume and the lines start to want to show up and do partially just for a little while ,but almost as soon as the info on the screen disappears as far as mute/ no mute or the volume level , the vertical rows of horizontal lines go away , I should also say that in either case Fire TV stick or cable , these vertical rows of horizontal lines take a little time to develope all the way from where the caption lettering begin and same process for when they go away , it's not instant in either case , it can take up a couple of minutes for either process to happen , one other oddity I guess you could say , in watching a cable tv program where you may get let's say 5 vertical rows of horizontal lines top to bottom at the beginning of the process , if you happen to try to watch that show ,those individual vertical rows of horizontal lines of varying widths will eventually connect with each other horizontally across the display

Feb 18, 2018 | Insignia Televison & Video

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