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

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Sony tv model no. KV - 19 APR 2

Help me fix this sony tv, only reddish horizontal line appear on the screen. pls. tell me what must i do to fix this problem. i already replaced all the electrolytic capacitors around the vertical IC part no. UPC1488H. pls. help me as my expets your advised is greatly appreciated.

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  • milmar
    milmar Aug 01, 2008

    no i dont have service manual for this...

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Dop you have related Service Manual?

Posted on Aug 01, 2008

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1 Answer

I have a KF-42E200A Sony Bravia LCD tv. Recently we had to replace the lamp. Since then a horizontal line appeared at the top of the screen and it has grown to about 3 inches now. The picture itself is...


The lenses in the TV are more than likely misaligned due to heat from lamp. The heat can cause the lenses to move and the red shaded horizontal line appears over time because the lenses fall out of alignment.

You just need to have the lenses realigned and the red shading will go away.

Jan 07, 2010 | Sony Projection Televisions

1 Answer

Sony Projetion TV has horizontal blue lines across the screen


It is hard to tell from your description what is wrong--confirm actual model number for me.

I am going to attach some photos of what CONVERGENCE troubles look like--they may or may not look EXACTLY like your set but if you have something similar I can help you with more information.

If this helps you rate this solution as I do this here for free.

SD TECH

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Dec 26, 2009 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony Trinitron 20" TV (KV-2093R) Suddenly Shut Off


2 things that will cause that vertical IC or Yoke! Listen to this one went on service call 2wks ago Customer had a 50 INCH1988 pioneer big screen replaced 3 capacitors resolder poor connections TV is now working like New ?

Jun 23, 2009 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony screen is white.


is there screen fully white or white screen with some horizontal lines ? pls send ur feed back

Dec 10, 2008 | Sony Grand WEGA KF-50WE620 Television

1 Answer

Sony 51" rear project tv


Click here to find information on how to fix your TV. Make sure that you turn the screen control slightly counterclockwise until you see the lines disappear.
I would suggest to put a mark where the original position is, just in case you have to go back to the default position.
Good Luck.

Sep 22, 2008 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony tv model no. KV - 19 APR 2


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

Aug 01, 2008 | Sony KP-48V80 48" Rear Projection...

3 Answers

Sony tv no picture only horizontal line


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 | Projection Televisions

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 | Projection Televisions

1 Answer

TV - worth fixing or pitch?


Horizontal output and regulator transistor often short out on this model causing a dead condition. Also the resistor right next to the regulators goes open as well. Electronix.com has a sony repair kit to fix the power supply. You just have to check the numbers on your Horizontal output transistor to make sure you get the right kit for your model.

Feb 03, 2008 | Projection Televisions

2 Answers

Hitachi 51SWX20B Convergence problem


Solution:

Your TV has a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence or magic focus section.

Try to adjust the convergence.

You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Its a fairly easy fix on the Hitachi sets.

You can get a repair kit that includes all the parts from www.TvRepairKits.com. The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself.

Jan 28, 2008 | Hitachi 51SWX20B 51" Rear Projection...

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