Question about Sony KP-46WT500 46" Rear Projection HDTV-Ready Television

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Sony 46WT500 Display Issue (Convergence?)

Upon power-on, TV works fine, convergence fine; after about 5 minutes, green beam moves about an inch to the right, bends inwards on the left side [looks like ) ], and there are ripples in the beam around the bottom half. It fixes itself temporarily with the convergence being a slight bit off (can separate green, blue, red beams slightly), then comes back and sticks. Powercycling gets me 5 more minutes of functionality, after which it comes back. Occurs whether set is warm or cold.

Is it an issue with the STKs? Should I order replacement STKs (392-570) and pico fuses, or would the problem be somewhere else? Don't want to invest in the ICs if they're not at fault. Thanks =)

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Converge chip failing after warm up fairly common
to see

Posted on Dec 26, 2008

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I am a technicien, i 'll like to ajuste the convergence for tv sony kp-46wt500 ,but i dont have the code to go in the tv (service mode)


With set off and using the original Sony remote:

Display, 5, vol up, power

Buttons on the remote will let you cycle thru the menu to the convergence adjustment--do you know what buttons to use and what they do?

Mar 20, 2012 | Projection Televisions

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Curved horizontal green lines bout 2 inches apart from bottom to top of screen.kp-46wt500 model


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
f0900cb.jpg
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 14, 2010 | Sony KP-46WT500 46" Rear Projection...

1 Answer

I have a Sony TV that needs help...model# KP-46WT500. Issue is, turned it on this morning and Red Green and Blue are no longer lined up. You can see three images in every color. it's looks better in the...


Convergence is dead.Must replaced 2 convergence ICS,and some or all it resistors.Can u do soldering electronics parts?Buy a convergence kit at websites Tv repair World.com,Tvrepairkits.com to repair it ur self.The shop will cost u $300 for parts and labors.

Feb 25, 2010 | Sony KP-46WT500 46" Rear Projection...

1 Answer

I have Sony KP-46WT500 Projection TV. For some time it appears convergence went bad. I see multiple images, especially at edges and corners. As many as 3 images Red, Blue and Green. I am an Electronics...


Hi,
It would be great to assist you in Sony convergence issue.
As you said, for some time TV shows bad convergence in picture that shows its matter of lose/ dry solder joints in D board, specially on convergence out ICs pins that need to be re-solder.
There are 2 big black ICs mounted on aluminum heat sink on D Board of TV, below image shows D Board location in TV.
Resolder pins of these 2 ICs and also check any other dry/ cold solder joints in circuit board. I do not think of IC replacement as problem occurs some time.
Let me know if you have additional question.
Thanks.

bc7880f.jpg

Dec 20, 2009 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Sony 46WT500 green beam ripple


Its the convergence output ICs or the solder connections beneath them.

michtech

Feb 19, 2009 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Red Covergance Issue


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. 

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 27, 2009 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Sony Projection TV KP-46WT500 Convergence Problem and Sparking


You may want to get some help with this install...goto www.tvrepairkits.com and ask for some help

Jan 14, 2009 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Convergence issue


Not sure how service menu will help you other then to do more adjustments such as 3D reform and such. Not real sure, just a long wild guess but the coils on the picture tube could possible be loose enough to change positions when heating up causing picture alignment to change. Might be a cheap service call. 

Apr 23, 2008 | Sony KP-61HS10 61" Rear Projection...

1 Answer

Sony KP-57WS500 Pictures problem


Your Convergence Correction Amplifier ICs have gone bad (STK329-110) They must be replaced along with the biasing resistors

www.electronix.com has the parts you will need plus I would suggest that you have a qualified TV repair person do the installation for you.

Make sure the traces on the circuitboard are good and that the solder connections are good.

But the ICs and resistors need to be replaced.

Thank you,
Shuttle83

Oct 30, 2006 | Sony KP-46WT500 46" Rear Projection...

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