Sony KP-46WT500 46" Rear Projection HDTV-Ready Television Logo
moses mah Posted on Jan 14, 2007
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Sony TV KP-46WT500

My KP-46WT500 after three years of average use lost its convergence. I tried flash focuse, no use. Could sombody put a pictur of IC STK 392-56 part # 87401908 on this sit and let me know if a novice person can replace this item. Thnak you

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  • Sony Master 3,459 Answers
  • Posted on Mar 09, 2012
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Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Below are more details for both items. Also, complete repair kits with instructions and repair support are avail from site such as www.TvRepairKits.com

Common Problem #1) Convergence has gone out

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 these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

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. The power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


Sony TV KP-46WT500 - 7859b01.jpg

e87380c.jpg
SOLUTION #1

What you will need to do is convergence. You can get a repair kit from TvRepairKits.com . It includes replacement parts,step by step instructions, support, etc.

Common 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 fluSony TV KP-46WT500 - 578ba6c.jpg

578ba6c.jpg

65af323.jpg

69189a5.pngSOLUTION

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

A

Anonymous

Sony does not back up their product. No more Sony for me.

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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.

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Symptom shows that it is convergence out chips failure that causing misaligned images on screen. Please replace convergence out chips in tv to get converge picture.
Question shows it is Sony KP-46WT500, if it is different model let me know please.
I can provide you more technical assistance if you wish to repair tv by yourself.
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http://servicemanuals.vstore.ca/
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http://www.techlore.com/forum/thread/18970/Sony-KP-46WT500-Convergence-Repair/
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http://www.techlore.com/forum/thread/18970/Sony-KP-46WT500-Convergence-Repair/
can you confirm the make and model.
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