Question about Sony Grand WEGA KDF-55WF655 36" Rear Projection HDTV

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Sony HD 42" color tv - model # KP-46WT510

Picture is there but unbalance. There are green lines/bar across the screen. I use the focus button. However, it is not responding. What shall I do? Thank you. David

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Re: Sony HD 42" color tv - model # KP-46WT510

These sets usually need the two STK integrated circuits changed. If you have soldering experience you may attempt to change them yourself. If you get the TV apart the numbers are marked on the ic's either 392-110 or 392-560

Posted on Apr 06, 2008

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Hello i have a sony KP-46WT510 model 45" TV, and

Below are two of the most common problems encountered with projection TV sets.


Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on Projection TV sets and a fairly simple DIY fix.

Common Symptoms include....
  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
  • TV shuts off after powering on - TV may also make a chirping noise.
Here are some photos of convergence problems.



Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a solution


You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.

This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from

Their kits include a step by step instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

Problem #2 CRT Fluid is Cloudy

Projection tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around video.

Pic of a set that needs the fluid changed. Notice how dull the colors are and how white the screen looks. The screen may also look red, orange, dull, etc.



Set after fluid change. Notice how bright the colors are now. Everthing looks crisp and sharp again.



724bcba.pngSolution #2 - CRT FLUID FIX

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from . It includes replacement coolant,step by step instructions, support, etc

Feb 18, 2011 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Wavy lines green and orange hue.While watching a fooball game the status bar is wavy and in two separate lines-Green and Orange-Tried flash focus and convergence and powered unit off for several minutes...

Flash focus button push,didn't solved pictures convergence problems.The tv convergence board is dead.The 2 STK convergence ICS and some or all it resistors are dead.These parts on the tv convergence board,must be replaced to solved the tv picture convergence problems.The shop,will cost u $300-350 for parts and labors.

Sep 18, 2010 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Top left area of screen turning green

The tv have a problems known as a convergence problems,it dead.Colors R,G,B lines mis alignment,have colors shadows,and 3D picture.The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts are dead,must be replaced to solved convergence problems.The shop will cost u $300-350 for parts and labors.

Sep 04, 2010 | Sony KP-46WT510 46" Rear Projection HDTV

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Why has my hd lost its luster? not asclear, smoky picture. its a sony rear projectile tv hd 46in. model kp 46wt500

usually these tvs will need a tune up from time to time. You can try to push the flash focus button on the front and that will fix any minor misalignments, but to really fix it, it likely needs the crts focued and a convergence re-alignment. sonys are tricky, but if you feel savvy and want to dive in, let me know.

a tune up may run $50-150 from your local repair shop

Jun 14, 2010 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

I have a Sony, 54" Projection Screen HDTV that I bought in 2002. I believe it is a 1080i. When I am waatching TV, I notice that when the screen is mostly black, for instance a night scene, the black areas...

Confirm the actual model number as the one indicated in the title is not HD.

Some of these sets had bad picture tubes that on a black screen or blank video input may in your case show faint curved lines and or some color (red,green or blue) present in the background.

If this is the case there is a fairly simple way to attempt to adjust something for this--not in the customer menu but fairly easy to get at and try.

Most of these sets were KP51ws500, 57500 etc.


May 11, 2010 | Sony KP-46WT510 46" Rear Projection HDTV

2 Answers

Our Sony KP-46WT510 rear projection screen TV just

Convergence ICs, they are big black ICs will have part# on them if they are STK392-110s use 180s better ICs also CK pico fuses in front and behind ICs
they will look like resistors but will be Yellow or Green 5amps/6amp fuses

Mar 18, 2010 | Sony KP-46WT510 46" Rear Projection HDTV

2 Answers

I have a red shadow in 3d on sony KP-46WT510 TV.

Ur convergence is dead.Problems:Are 3D colors,colors misaligns,and colors out of focus.Know how to solders?Must change 2 convergence ICS,and some or all the resistors.Tries Websites Tv repair, to buy a convergence kit to repair it ur self.The shop will cost u $300 for parts and labors.

Feb 17, 2010 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Red red wavy lines across the TV screen

I did not fix the problem, but you have the model number wrong, it is KP-46WT510

I do need some help.

Nov 23, 2008 | Sony KP-43HT20 43" Rear Projection...

1 Answer

Red Green Blue Across The Screen

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Dec 06, 2007 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

Sony tv KP-57XBR10W

Correct ! One set is for RGB focus and the other set is for
RGB screen voltage............................T.

Oct 05, 2007 | Sony KP-57HW40 57" Rear Projection...

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