Question about Sony KP-61V90 61" Rear Projection Television

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Where is a good place to search for a circuit board chips

Blew up a chip on a small 2.1ch speaker system from Japan, looking for a replacement chip for some one to fit. can part read the name and numbers on the burnt chip  Tai-1 T421DSE... El02HA Thank you

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The best way to do this is to get the schematic, lookup the part number and then get the OEM part from the manufacture.

Also you can look the part up at or any of the other electronics part stores.

I hope this helps,

Thank you,


Posted on Jan 15, 2009

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How do i remove convergence chips unit on jvc av-48wp74

I have some good advice for you---done this on this model several times and I will attach a few photos as well..

The convergence board is at front of set---remove 2 screws on back on either side---two more tiny ones on front where control door is and lift and remove entire grill below screen off.

There is a inspection plate dead center behind where the grill was--remove it also.

Behind it is the convergence board. It helps to take rear cover off also.

there are about six plugs to remove---three are identical for the convergence yokes----make sure you mark them so they go back in the exact same place as removed.

There should be another plug going to (seen from front) left to the power supply board and another small plug to the front left.

The last plug is hard wired into the convergence board and goes back and up to another board where it can (from rear of set) be unplugged.

Board is held in place by plastic tabs at front of set into the black plastic frame--lift it carefully up in case is also screwed in(not usual).

You now can lift the board up and out the front of the set.

If you look at the resistors---in front of the chips I would test all the small ones there and look for any that are discolored--if memory serves me they are 1.8 ohm and 1/2 watt----only the 1/2 watt resistors will fail and usually the set will not come on if this is the case---power light constantly blinks will be the issue.

Let me know if you have not replaced the chips ever and I will give you some pointers etc.



Oct 30, 2012 | JVC Televison & Video

4 Answers


You can check this link for that convergence that your looking
after you replace thet convergence correctly its should be working fine already..

Good luck.........

Aug 10, 2008 | Hitachi 53FDX20B 53" Rear Projection...

1 Answer

How do I adjust the convergane on my RCA p52921 52 in projection tv I just replaced the convergance chip the stk730-130 and it still looks 3d the place I got the chip said it would need to be adjusted

IF THE convergence is not better after replacing the chip something else on that power board is bad; be aware of the 10 or so diodes on that board---two are much larger than the others--those two supply to voltage to the convergence circuit.


May 13, 2011 | RCA Televison & Video

1 Answer


there are fuses on each driver (6 in all) under the heatsinks usually.. make sure these are good. there are also 2 5amp fuses on the g board that supply power to the chips + and - 24volts.. check both of these.. i've seen some check good in circuit and still are bad, check voltage to see for sure. In a rare case, i knocked off a small surface mount resistor when unsoldering the chip, and then the convergence was muted.. make sure no small surface mount parts were moved on the bottom of the board when you soldered. good luck, let me know wif you need futher assistance.

Jun 19, 2010 | Televison & Video

1 Answer

Philips 60 convergence problem

When you take off the back of the TV, you should see a fairly large circuit board with two black chips that are standing vertical. They should each say STK392-XXX (where the X's are typically 100, 110, etc.). The "convergence chips," as they are called, can cost you anywhere from 15-30 dollars depending on where you buy them. You can either go to a TV repair shop and have them order the parts for you, which means there would be a middle man, or you could find some online. has a number of kits available to make the job easier. You just plug in the brand, type, and model number of the TV and you can look at the various kits they offer. Last time I checked it was roughly $70.00 for two chips, soldering guide, online support, and some other stuff.

Another option would be to simply type the chips code (STK3392-XXX) into a search engine (google, yahoo, etc.) and then see if you can buy the chips alone. This would msot definitley be a cheaper option.

Once you have ordered the convergence chips, you are going to have to remove the circuit board/wires and anything attached to the circuit board. Once you have the circuit board out, you are going to need to flip the circuit board over and remove the solder using a soldering gun and some "wick" that will soak up the solder. You will have to do this for both chips, flip the circuit board over, remove the clamps, then remove the chips. Next, I would insert the chip, clamp it in, flip the circuit board back over and begin soldering the pins individually. Do this for both chips.

Chances are, you are also going to have to repalce some resistors as well. To do this you will need a multimeter that measures ohms and a chart telling you how to read resistors. One can be found on under the hints/tips section.

All in all, it should only take about an hour with fairly good soldering skills. So you will need a screwdriver with a "star" shaped head, possibly a philips head screw driver, and a steady set of hands to remove the circuit board. Then you will need some desoldering wick, a soldering iron (I would use a 15 watt iron), some small-diameter flux-core solder (rosin), and some patience. There a PLENTY of youtube videos that go through the repair step-by-step.

It's not as bad as it may seem after reading this article. Soldering is not difficult, however, when working with circuity it can be somewhat easy to screw something up. That being said...a little confidence and a lot of patience should get you through it. Good Luck!!!


Feb 27, 2010 | Philips 60PP9202 60" Rear Projection...

1 Answer

How do you replace ic chips on Panasonic 52 inch hdtv projection?

Most IC's on circuit boards these days are of the surface mount variety. You will need special Desoldering Equipment to remove these chips, especially the one wth 100 or more pins, the type of equipment used in this process heats all sides of the chip at once while a small suction that grabs the chip for removal. Now the SIP chips (Single inline package). chips which usually consists of less then 20pins can be removed with a desoldering gun such as the HAko 880 desoldering gun. Or you can use a standard soldering iron and solder Wick, that can be found at Radio Shack under Soldering Braide).. These procedures are common for all IC replacement. I am asuming you are trying to remove the Convergence IC on this model, The two large Black one labeled STK-392-110, the correct and easy way to remove these is to remove the entire board from the unit and remove the two screws holdinf each one in place, Unsolder the pins of each one and remove the IC, reverse this process to reinstall them. Good soldering technique is critical here as you don't want to bridge pins together causing yourself more problems. Double check your soldering and Double check it again.

Thanks :

Sep 28, 2009 | Panasonic PT-53WX53 53" Rear Projection...

1 Answer

JVC av56wp74 red lines won't converge. How can I fix it myself. I have seen that a few people have done it themselves, wondering if I can get some info on how much parts cost and if It is the chip is the...

1. disassemble front speaker panel.

2. locate circuit board in front with the 2 large black or silver heat sinks standing up. (this is your convergence board).

3. disconnect all the wires on this small board, but make sure you take a picture first to know where they all go.

4. look for 2 black cips that says stk ***-***.

5. order replacement chips on line.

6. learn to solder before chips get to you home.

7. watch you tube videos titled "how to fix tv convergence.

8. wa, la send me some money to show me your appreciation, lol.

Jun 04, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Convergence intermittently bad

Are you talking about the heat sink?  The chips normally screw on to this "board" you're talking about? (silver, aluminum looking?)  I dont want to speculate here but did you use heat sink compound (also know as thermal grease)on the chips?  If so, the answer to your question for a known fix would be: you have a heat problem and all you might need to do is get some 5 dollar heat sink compound and get a quick fix.  Meaning, apply some of that stuff between the chips and the heat sink.

Oct 19, 2007 | Panasonic PT-47WX42 47" Rear Projection...

14 Answers

Convergence IC STK392-110 vs STK392-110T

6b5ee7e.png Based on your post above it sounds like the chips you tried were knock offs and not original Sanyo chips. They will look almost identical but the knock off chips will only last a month or two.

Here are some of the most common symptoms 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.
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.

You need to replace the convergence chips and convergence resistors. Check the site They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Aug 04, 2006 | Toshiba 55H70 55" Rear Projection...

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