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Sony KP46WT510 Projection TV

What is IC and what is the heat sink...and where are they located?

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Pic of ic known as SDK's
Sony KP46WT510 Projection TV - 41ae87f.jpg Heat sink is a hunk of metal attached to above

on a sony the convergence board is known as "d" board labeled with a big D

Posted on Jan 20, 2008



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When you try to turn the tv on, all you get is a blinking red light, if you unplug for awhile, sometime it will come on.

Symptom: tv turns on, tv clicks once, red light comes on. Then, tv either works for a while, followed by a click, no video, normal sound and flashing red light; or, tv immediately clicks, no video, no sound, red light flashes. If that is the problem, you need to replace the convergence ICs. I had to do this twice. The two convergence ICs are mounted on palm-sized aluminum heat sinks. The heat sinks are soldered to the main circuit board. There are 4 pins soldered to the board for each heat sink, and 18 pins soldered to the board for each IC. Some of the heat sink pins are a bit difficult to desolder. The pins for the ICs are not difficult to desolder, but you must be careful not to overheat them. The heat sink and the IC come out as a unit, after all pins are desoldered. The IC is screwed to the heat sink. The correct replacement IC is a Sanyo STK392-110. I got mine from B&D Enterprises. They were not expensive. The new ICs need to be mounted to the heat sink with a heat transfer paste. I used Arctic Silver from my computer processor heat sink. Installation of the heat sink/IC assembly is a bit tricky, since you have to align all 18 IC pins and the 4 heat sink pins. When all the pins are visible through the holes in the circuit board, resolder everything. The TV should now work. Be sure to replace both ICs. My first repair was done by a technician, who obviously only replaced one. That repair only lasted a couple years, before the problem returned.

Mar 22, 2011 | Toshiba TZ55V61 55" Rear Projection...

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My Sony rear Projection tv the sound is coming on but no picture, then it turns itself off, cheers jUlie

Bad grounds are your problem. This TV is aging and suffering form time. You will need to rework the power supply, check your capacitors and grounds. You will need to purchase an ESR meter to locate and replace capacitors. The next thing is to locate the vertical IC. By now this IC has pins that are separated from the grounds. You will see rings around the vertical IC pins on the solder side of the board. Once again search the main board for bad grounds on ICs mounted to heat sinks, power resistors,capacitors, diodes, jumpers, transistors and most certainly the flyback transformer and the horizontal transformer. I feel this TV can still be saved from recycling. Any one with electronics experience knows what I am talking about. If you can not do this find a TV tech, or a hobbiest. Thanks for asking and show a few hands of support.

Feb 21, 2011 | Sony KP-51HW40 51" Rear Projection...

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Where is the convergance Chip located in this television SOny Projection KP51WS510?

Remove back cover of tv and on left side thee is D Board that has 2 big black ICs mounted on big aluminum heat sink, these are convergence chips in Sony KP-51WS510 tv.
Below is an exploded view taken from service manual and convergence out chips location is marked with red just to give you an idea.
Hope this info will help you.


Jan 23, 2010 | Sony Televison & Video

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...

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.


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

1 Answer

Sony kp 46wt500 has 3d screen what might the problem be?

If convergence out ICs got defective then TV shows that kind of picture.
Replace IC8001 and IC8002 on D Board, both big black ICs are mounted on aluminum heat sink and number STK392-560 would be written on it.
Required ICs are available in Part Store, click that link to see an image of IC and price info.
If you are not comfortable with soldering parts in circuit board, call local tv tech to replace it.

Nov 13, 2009 | Sony KP-46WT500 46" Rear Projection...

2 Answers

Where is the convergence chip located

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...


Aug 03, 2009 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

My sony 46 kp46wt510 panel tv has red outline on images

its more likely needing the convergence ICs replaced. You can get the convergence repair kit for your model at the following link which contains both IC the six pico fuses and four of the feed resistors, The kit comes with instructions. Heres the link.

Feb 01, 2009 | Sony KP-46WT510 46" Rear Projection HDTV

1 Answer

No color and green and or purple color stripe

Yes, sounds like the convergance IC's. They will need to be replaced.

Apr 13, 2008 | Sony KP-46WT510 46" Rear Projection HDTV

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Sony wide screen projection tv model kp46wt510

Hi, replace the convergence IC`s and any discolored resistors in front of the IC`s, and you`ll be good as new, BMW Rider

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Hi,sounds like the convergence power supply reg.has failed,when this ic fails the adj. projection tv leaves the menu,this ic is located on the board above the board with 6 heat sinks on it mounted on the black plastic,its the ic that is heawt sinked on this board,part number is 215530

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