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Which is the best STK392

Doe's any body know which is the best STK392 chip for the Samsung SP55W3HFX TV.


Thank you



Posted by Ross McMahon on

  • Ross McMahon
    Ross McMahon Oct 15, 2007

    Thanks, So the STK392-020 will definitely work on the Samsung SP55W3HFX. 

  • Ross McMahon
    Ross McMahon Jan 15, 2008




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Here is the spec sheet for stk's chips

Posted on Jan 15, 2008


Mike Longo

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For the Samsung sets, I use the STK392-020 chips.  The -010 are the weakest and the original -040 always seem to fail.  I have found that the -020 is the most reliable.

Posted on Oct 15, 2007


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I have a Samsung Model PCN5425R Rear Projection TV. When I try to set the convergence, the red will not move whatever I do, but the blue works fine.

If it is rear projection set it uses either two of the STK-392-020 OR STK-392-040 CHIPS FOR CONVERGENCE OUTPUT.

BOTH WILL HAVE TO BE REPLACED; NOTE THAT THESE SETS ALSO HAVE "PICO" FUSES ON THE BOARD FOR EACH CHIP--no movement means one of the fuses is blown because the chip shorted.

This can be a do it yourself repair if you are handy; total parts cost if the parts purchased on Ebay is under 30 dollars.

Let me know if I can assist you and if you have any questions reply to the posting here.


Aug 10, 2010 | Samsung PCN5425R 54" Rear Projection...

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I have a Hitachi TV 55 in.10Yrs. old, I know you can still get a lot of parts & some you can'tThe color is not right, they can have green hair, there is also like a 1/2 moon at the top & bottom. Thank You,...

You find the problem to be your STKs convergence Chips replace both ics They will be Big black ics If they are STK392-110s replace with STK392-180s they are better ics call Electronix Parts 1-800-223-3205 If you need anymore help let me know.

Dec 12, 2008 | Televison & Video

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hi bully, the problem is the convergence ic diodes, 3 way convergence chip called an stk392-140. you need to purchase x2 they are easy to soilder in, a novice could do it. you can purchase from (little diode uk) all the best.

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1 Answer

Are those right?

No STK392-040 will not change to the 110. STK392-040 and STK392-010 are the same chip except the 040 is a better chip more durable. Use both STK392-040 they last alot longer. You will need to do the perfect focus after replacing the ICs but thats it. If you order through the link I provided you will recieve the instructions as well as free support while your doing the repair via online chat. Thats a good service. heres the link I dont remember if i posted it before for you.

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Stk392-110 chip replacement

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No power all of a sudden

im thinking you blew the chips again, i would use sanyo chips from mcm not cheap ones
This is a list of most of the commonly used STK devices and some that Sanyo made that are rarely, if ever, used. I will add links to the data sheets that I have, but some of them are not available. Some of the chips are versions made for a particular TV manufacturer, and Sanyo does not provide data on those, typically. It is generally best to use the same chip that is found in the set. However, there have been newer versions of some of these produced that are identical in performance and superior in certain applications. I will note my recommendations and the logic behind them, but I in no way, nor does HTS, take any responsibility for the accuracy of the information with regard to substitution of parts. Any substitution is your responsibility. I can only relate what I have found to work with parts that I know to be original Sanyo parts.

STK4273 replace with STK4274 if heat sink allows


STK392-010 replace with STK392-040
STK392-020 replace with STK392-040
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STK392-110 replace with STK394-160
STK392-120 Hitachi replaces these with STK394-160, for other sets it may not be a good sub. They have been fine in the Philips sets so far.
STK392-150 replace with STK394-160
***The 394 series replaced the 392 series and is cooler running. The subs listed here are the ones that I know to work in most sets.



STK394-160 (This is my choice to replace the STK392-110, -120, & -150 in most sets and are available in the Hitachi kits in the next post)

-L means bent pins for horizontal mounting
-E means lead free
-HIC in Mitsubishi parts simply means that it is an IC on a heat sink and is irrelevant to buying parts.

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Yes thats what you need. Just go to radio shack get a de soldering Iron (the kind with the rubberbulb works fine) as wel as a fine pointed low wattage Iron. Also pick up a tube of heat sink compound while your there. Then lable your wires on the tv that you remove. Desolder both STK392-040 chips and solder in the new ones. Just ve careful not to bridge any of the pins with solder chck them with a magnifying glass. Dont forget to coat the back side of the new heat sinks with heat sink compound. You will need to adjust the convergence when youre finished. Just go slow it takes about an hour. I would also vheck the resistors right next to the ICs at times on or two of them get burnt when the ICs go out. Heres a link to where you can get the replacement ICs.

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3D picture stlye Samsung SP55W3HFX

Hi Ross, This repair is quite easy, But before I tell you how to fix the problem I need to know have you gone in to the user menu & tried adjusting the convergence This will save time & expense for you ? If you havent then try this first it may sort it out without needing to dismantle the set. Let me know how you get on by either replying to this post or let me know via email [email protected] Chris..

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