I have a KP-46WT510 and have replaced both STK chips and 1 fuse on the power supply board. Under the heat sink there is another fuse burnt. The value of the fuse needed is 3.15 A. I put in a 3 A fuse and turned on the TV and when I checked the fuse again it was burnt. I now have a 4 A/125V fuse and want to put it in, but am afraid another component might blow. Any idea what the problem might be. I have looked at all the resistors and they seem fine.Any way I could diagnose my problem?

it will need a new light board or you will need to turn the brightnees up

Hi,
triple images show failure of convergence out ICs in TV, these are two big black ICs mounted with aluminum heat sink on D board, replace these ICs with same number STK392-560 and problem in your Sony KP-46WT510 will be solved.
Required ICs are available in Part Store.
Let me know any further question, if any.
Thanks.

This model was was made around 1999 and most of the Sony sets use two STK-392-560 OR two of the STK-392-110 CONVERGENCE CHIPS.

The chips are located on two metal heat sinks with fins and usually are on the board on the far left as you look from the back of the TV.

They will be black in color--about 2 and 1/2 inches wide by 1 and 1/2 inches tall and black in color--they will have the STK full number printed on them in white.

A pair of either chips can be bought on Ebay for about 12 dollars plus shipping----there are several fuses that do not look like fuses that protect them--two are on the power board and the rest are around the chips.


What needs to be done here if convergence is bowed and or will not adjust---both chips and any other bad parts--fuses etc need to be located and replaced---usual parts cost is under 30 dollars.

The board will have to be removed from the frame to get at them and they and the fuses are soldered in---you need to be able to solder etc.


If you can do the repair or know a friend who can do it for you -----you can save the set and a lot of money

Most shops are going to get 300 or more for this type of repair.

I know as I have done hundreds of these sets with convergence problems---

I am here to help people---I do this here for free--if you have questions or need advice let me know.

Regards, SD TECH

If this is a kp-46wt510: You need to replace the two convergence ic's; they should be STK 392 types---look inside and you will see them on identical large metal heat sinks with fins--the ones your set uses will have the full stk number on them(stk-392-110 or stk-392-560 are the most common for Sony)

They both need to be replaced and any bad fuses or resistors around them that protect them found and replaced---Most of the time just the two chips need to be replaced and the set adjusted with the remote; I have done hundreds of these sets and usually the repair takes about an hour and can be done in your home.

If this has been helpful give me a vote here as I do this for free.

if you have questions or need help:

[email protected]

Convergence out ICsare located on D Board of Sony KP-46WT510
These are 2 big ICs of black color mounted on silver heat sink.
Check out location of D board in TV in below exploded view...

I have the same model tv, with the same problem... convergence ICs were shot.  As you look into the back of the tv, the ICs are located on the backside of the large heat sinks on the tan board.  The pico fuses are directly under the heat sinks.  
Removing the board is fairly easy with the exception of removing the red cables at the rear left side of the board.  You have to exert a lot of force to pull them out (they go into the grey tower looking thing) but they do come out.  
I recommend taking pictures of the board before removing, and then make sure you label each connector you pull off the board.  There are six screws to remove as well.
Check with Sonny and Barry at this site.  They gave excellent directions and have a convergence repair kit for your model tv. http://servicemanuals.vstore.ca/index.php/cName/convergence-repair-kits

Good luck!

I am also having the same problem. I tried to replace ICs but no luck. I am also looking for service manual in case if some one can give it to me.

Thanks,
Sanjay

you need to replace both convergence ICs they are easy to install. You need two STK392-560 ICs you can get them at the following link and they provide free installation instructions as well as free online messaging with a repair tech while youre donig the repair. It takes about 45 minutes to do the repair and you will save about 400.00 by doing it yourself. Heres the link I am one of thier repair/support techs. This is a very easy repair.
http://servicemanuals.vstore.ca/
just click on the convergence IC catagory and you will see the STK numbers that you need.

you will need to replace the stk ic's they are mounted to 2 large heat sinks in side the tv. the ic numbers are on the chips themselves. i do believe it is stk392-510 for sony. once you have the number you can buy these anywhere online. just put new ones in and should be good to go. if this doesnt work then there are a few resistors and fuses by the ic's that sometimes fail.

No leave the jumpers in and yes replace the chips as that's why the fuse blew so it would not take out the power supply when they shorted. I hope you did get the right IC's, the ones that say Sanyo on them. If you did not, these replacement IC's you purchased are the factory rejects and may work for a short time, but not for long. Also do not forget to apply an ample amount of heat sink compound on the backs of the new IC's before you install them. Good Luck