Question about Sony KP-51HW40 51" Rear Projection Television

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Sony 51''TV Sony Model # kdp-51w5655 I Replace The STK'S On This Tv . And I Still Have The Same Convergence Problem I Checked All 6 Fusible Resistors Near The Stk's And All Resistors Are Good .Left Tv ON For 10 Min Touch The Heat Sink Where The Stk's Go And It's COLD It's Like There Is No Power Going To The Stk394-510's Can Someone Help Me And Tell Me What More To Check EMAIL Me At DJING_2004@YAHOO.COM Eddie Thank u

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Did you wing it or get a kit complete kit with instructions. If you bought a kit from someone re-read the section on checking the G board.

For all others - This is a very common failure on Projection sets. Its called a convergence problem.

You may have one or more of the following symptoms.

  • 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.
  • No Audio / No Video - Makes Chirping Sounds

Sony 51''TV - 3b59090.pngYou can see some examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Posted on Sep 27, 2009

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We wont stk394-510 parts

Posted on Jan 19, 2012

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Try this link. It helped me fix my set. www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

Posted on Oct 02, 2009

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I have a KDP51ws550 tv that has convergence problems. Flash focus would not work and neither would manual convergence. I replaced the both convergence ICs and checked the pico fuses, turned the unit back...


Check your soldering. Check the vertical power board on the far left when looking from the back. It has fuses on it as well.

Depending on quality of STK chips, they could have been bad or failed right away. Best things is to look at the schematic, verify what colors you can move and see which STK chip is not functioning.

If both chips are not function after replacement, likely a fuse. Be sure to verify the resistors next to the STK chips.

Mar 06, 2011 | Sony Grand WEGA KDP-51WS550 51" Rear...

1 Answer

Sony 51" projection tv standby light blinks 6


Your TV most likely has one of two possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem
  • 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.
701cb04.jpg
77ea520.jpg
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Here is a quick test....

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

Try to adjust the red and then the blue 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.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV 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 images.

Picture of a set that needs the fluid changed.

578ba6c.jpg
TV set after fluid change

65af323.jpg

2c07611.pngSolution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc

Dec 15, 2010 | Sony KP-51WS520 51" Rear Projection...

1 Answer

Sony KP 51 HW 40 - in left half of screen picture has double images, right half of screen picture is normal.


This problems very common on DLP Tvs.This problems known as a convergence problems,it dead.Colors lines R,G,B mis alignment,have colors shadows or 3D pictures.The tv convergence board is dead.Require to be replaced on the tv convergence board 2 STK convergence ICS and some or all it resistors to solved the tv convergence board problems,to solved tv convergence picture problems.The shop,will cost about $300-350 for parts and labors.

Sep 18, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

Sony KP-51WS510 picture swirls in the corners and is doubled


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

Sep 15, 2010 | Sony KP-51WS510 51" Rear Projection...

1 Answer

Picture is warped and picture is doubled


Tv have a problems known as a convergence problems,it dead.The tv convergence board require 2 STK convergence ICS and some or all it resistors must be replaced to solved convergence problems.The shop will cost u $300-350 for parts and labors.

Aug 08, 2010 | Sony KP-51WS500 51" Rear Projection...

1 Answer

My sony model kp46wt510 pic looks like its in 3d, what is the problem?


Tv have a problems known as a convergence problems,it dead.The tv convergence board require it 2 STK convergence ICS and some or all it resistors are dead,require changing.These parts on the tv convergence board,must have to replaced these parts to solved convergence problems.The shop will cost u $300-350 for parts and labors.

Aug 06, 2010 | Sony Grand WEGA KDP-51WS655 51" Rear...

1 Answer

I have a Sony Rear Projection Television and its out of focus what should I do?


Ur tv have a problems know as a Convergence problems,it dead.The tv convergence board reqiure 2 STK convergence ICS and some or all it resistors to be replaced to solved the convergence board problems.The shop will cost u $300-350 for parts and labors.

Jul 05, 2010 | Sony KP-51HW40 51" Rear Projection...

1 Answer

I have a sony projection tv model #KP51WS510 and I was told the convergance amplifier was going out and I was needing info about where it is located so I can change it out. Thanks


convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Oct 24, 2009 | Sony KP-51WS510 51" Rear Projection...

1 Answer

I suddenly have color separation (blue, yellow,white). Flash focus won't work. Any suggestions.


This is a convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Note: there are also pico fuses (on the same convergence board) that need to be checked/replaced

Oct 20, 2009 | Sony KP-51WS500 51" Rear Projection...

1 Answer

Hi!! my sony projection tv kp-51ws500 shows double picture. there is reddish outline & its out of focus. i need help to reapir this. please advise. thanks


This sounds like a convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400

Sep 30, 2009 | Sony KP-51WS500 51" Rear Projection...

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