Question about Sony KP-43HT20 43" Rear Projection HDTV-Ready Television

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Replacing The IC's

Need to replace the two ic's (stk392-560), can you explain how to remove them?

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Re: Replacing The IC's

Use a digital camera to take pictures of the chassis. Review the pictures to see if they can be used to reassemble the wiring plugs or restore the wire tie up positions. Remove the three screws that are located on the front edge of the chassis. After removing wires from their tie up positions or disconecting plugs the goal is to move the chassis into a position to expose the bottom side. Find a place to tie up the chassis using a piece of wire to one of the back screws to anchor this position. Use fresh solder wick and a 60Watt iron to remove the heat sink solder tabs switch to a 25 to 30 watt iron to remove the solder on the STK392-560 ic's. Remove the ic's from the heat sink and apply fresh heat sink grease before mounting the new ic's to the heat sink. Line the pins uniformly on the ic's if needed to install the ic/heat sink assembly. Use a flashlight or lamp to make it easier to see if the pins line up. Twist the solder tabs on the heat sink to secure it's position. Make shure all pins are present to solder in place on the bottom side.

Posted on Dec 06, 2006

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What's your question?my PCB have got a problem when I look closer I see a head sink on the board they is an ic that bust so I need that number of the ic but it see like it start with T

Although it may be done, i think replacing the circut board rather than the ic would be the answer to this one. Even if you have the equiptment and the skills it takes to succesfully replace the ic, chances are ,a critical circut malfunction occured damaging you chip. The same result may happen again with the new ic.
I would consider pricing either a circut board or a new display all together.

Jun 06, 2016 | Projection Televisions


How to replace a digital convergence box.

When your TV looks like 3D and you have already followed my instructions for replacing the convergence ICs at but the picture still looks bad, and you have checked all low ohm resistors in the convergence IC circuit, you need to replace the digital convergence box.

Sometimes the box can be hard to find and it may not always be near the convergence ICs. Generally the box is bright metal, vertically mounted to the mainboard. If you remove the side it will have a large flat pack IC with about 64 pins around the perimeter. Some units have the box soldered in while other manufacturers have theirs attached through a multipin clip. With the side removed you should be able to determine which way your unit is mounted and remove it properly.

The best source for replacement is . They also will generally list the digital convergence box as such. Some chassis have the schematics located there also which makes identifying the part much easier. If the manual is not located there encompass has a very good research department. Click on the research request button and tell them you need to know the price and availability for the convergence box for the model tv you have. They should reply with a part number and cost.

Another source to find the part is . They do not always have units in stock.

Once the box is replaced you will need to enter the menu and set the convergence manually. This should be explained in your operation manual. If you do not have it you can get it at .


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on Mar 06, 2010 | Projection Televisions

1 Answer

The sound on my toshiba theater view wont work i checked both the speakers and they are fine. Is this a simple fix?

If speakers are ok then the sound output ic of your tv is faulty. If you have basic knowledge in electronics then you can replace the ic. You can find the ic by following the wires from the speakers. It will end near the sound out put ic. The ic will be fitted on an aluminum heat sink. Note that number of that ic and get a new one from the nearest electronic spare part shop.For replacing the ic you need some tools like screwdriver de-soldering pump soldering iron, solder etc. All these thing will get from the spare part shop, if you don't have the same.Be sure to open the tv only after half an hour after dismantling the power because electrolytic capacitors inside it will store the power for some time.

Jun 09, 2011 | Toshiba 50A50 50" Rear Projection...

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My samsung rear projection tv has a problem with its convergence ic. i think theres two ics , but how do i tell which ic need replacing??

Always replace both once your going to the trouble each IC is usually less than $30.
This link will help show you what's involved.
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 $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail

Nov 13, 2009 | Samsung HLR5067WX 50" Rear Projection HDTV

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What is the best IC replacement for original IC part# STK393-110?

Sayo makes the best IC's, don't just settle for the cheap ones. I have see this ic for as low as $5.00 on the internet.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can try they do carry OEM or better parts.

I hope this information allows you to resolve this issue.
If you need further assistance please comment to this post and I will try to help you further.

Oct 13, 2009 | Mitsubishi WS-65513 65" Rear Projection...

1 Answer

Mod. WS-655111 Fuse F9A04 & 05 bad. Set goes on & right off

You can order a replacement STK393-110 for this model (62HM95) from a major parts distributor at the link below:

Mitsubishi WS-65511 Replacement Part Convergence IC STK393-110

You would probably have to recalibrate the convergence after you install the IC. There may be a convergence kit available as well.

Apr 10, 2009 | Mitsubishi WS-65869 65" Rear Projection...

1 Answer

Which IC is for red convergence?

you need to replace both because they are both linked together with the green as each IC controls one color fully and half the green, so when one IC fails that places a strain on the other IC through the green, so that one will soon follow. You need two STK392-120 ICs and you will also need four 6.8 ohm 1 watt resistors. You can get replacement ICs and resistors at the following link with free installation instructions with pictures so you can do the repair yourself. Heres the link.

Sep 08, 2008 | Philips 60PP9352 60" Rear Projection...

1 Answer

Convergence IC's went out I need the schematics for AV-48WP34

My samsung rear projection tv has a problem with its convergence ic. i think theres two ics , but how do i tell which ic need replacing??

Jun 26, 2008 | Projection Televisions

2 Answers

Convergence circut

Usually there are 2 convergence IC's, labeled STK392-110. Each IC has 3 channes. Each color needs to be corrected 2 ways, vertically and horizontally, so 6 channels are needed. usually one IC does red, red and haf of green while the other IC does the other half of green, blue and blue. If the red colors are off, change the IC closest to the red jack. If the blue is off, change the IC closest to the blue jack. If the green is out, you have a 50/50 shot at replacing the correct IC. It is recommended to use the STK392-150 when replacing the IC's so it might not be a bad idea to go ahead and replace both with the newer numbers.

Apr 11, 2007 | Hitachi 46UX24B/25K 46" Rear Projection...

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