Question about Panasonic PT-47WX42 47" Rear Projection Television

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STK392 convergence ic

I have read in numerous places that it may be better to move up to the 392-180 when replacing my ic's since the 392-110 is relatively old style, is this true and would it be ok on my Panasonic TH-46PZ80U.

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  • inspectionga Oct 04, 2009

    Not sure if I am satisfied or not, I have yet to find the stk392-110 , the flat screen configuration is different than the rear projection.



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Thanks for using FixYa. Before performing any repairsplease unplug the TV for 1-2 hrs to let the current drain. And remember that TVcontains very high voltages even in OFF state. It is recommended to replaceSTK392-110 convergence IC with a 392-150 instead of 392-180 which will alsowork equally well in comparison with 392-150 but it may reduce the life of theTV. You may also see this link for reference and ordering STK IC on line.

STK ConvergenceIC

You can see the step-by-step procedure on the followinglink for replacing it---

STKConvergence IC replacement

Please doaccept the solution if the issue is resolved or else revert for furtherassistance.



Posted on Oct 03, 2009


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How do I fix a converence problem?


First try using Autofocus. If there is a convergence problem this won't fix the problem.

Try using the convergence alignment procedure from service manual.

Here the procedure that works on most Hitachi rear projection.

Here the grid with convergence problem


If the procedure does not work, then the two STK392-110 on convergence board must be replaced.

Before replacing the ICs you can test the pico fuses located on convergence boards. Simply read ohms to test if they have continuity.

Better also testing components on convergence board like resistors located at the base of STKs.

After removing the old STK, the new ones must be re-soldered using cooling paste.

Price for single IC can is about $8/$20. I think
STK392-110 on this model can be better replaced with STK392-150. I suggest contacting the seller on this.

The service manual is available here.

Jan 12, 2010 | Hitachi 50SBX78B 50" Rear Projection...

1 Answer

Convergence red

The only way to fix the problem is to replace the IC's and when you do, replace them with STK392-120 instead of STK392-110. It's not a hard job if you're patient and label everything well (knowing how to solder and unsolder helps alot as well) - Good luck!

Sep 28, 2009 | Toshiba 42H81 42" Rear Projection...

1 Answer

Convergence issues

There on front left board is 2 black ic chips STK392-560s or STK392-110 depends sony uses different #s replace with same part number if it is a 392-110 use 392-180s they are better then 110s you can order parts at Electronix Parts -800-223-3205. When 1 is bad always replace both of them.

Dec 19, 2008 | Televison & Video

2 Answers

Convergence IC upgrade

you should stick with the 110's. the pinout may be the same, but that doesnt mean they will work. Also you need to check all of the large 1 watt resistors by the STK's - if one is bad or out of spec it will greatly effect the picture. Remember, you need to test these OUT OF CIRCUIT.

One more thing, there may be some small Pico fuses or other fuses near the convergence power supply - check all fuses as well.

Dec 18, 2008 | Toshiba 50H72 50" Rear Projection...

1 Answer

Convergence Amp IC Shot

yes the convergence ICs are bad, they are stk392-110 but be careful where you get replacement ICs as alot of places sell cheap chinese made knock offs that dont last . I deal with alot and have never had even one IC go out so I use them exclusively now.

May 18, 2008 | Panasonic PT-56WX53 53" Rear Projection...

3 Answers

Convergence problem

The Stk392-120 are better ICs if you would like a link to get new ics that provide free instalation instructions with pics let me know and I will post the link.

May 15, 2008 | Hitachi 53UDX10B 53" Rear Projection...

2 Answers

Red shadow line

you need 2 convergence IC's this is an easy repair take the back off your tv and they are on the right hand side of the board mounted to the heat sinks check your ic's for the stk numbers it will either be STK392-010 OR STK392-040 you will need 2 of them I will post you a link where you can get replacement ic's as well as free online tech support and installation instructions with pictures for reasonable price

Apr 22, 2008 | Samsung HCM5525W 55" Rear Projection...

2 Answers

Panasonic 47wx42f projection

It sounds like your may need to replaced your convergence ic's loc# ic7001 and ic7002 stk392-110. That should take care of your alignment problem.

Dec 03, 2007 | Panasonic PT-53WX42 53" Rear Projection...

1 Answer

SD-P50A5-K convergence board replace STK392-110

Unplug chassis from front and back,remove chassis from back.Replace Ic's w/OEM or better quality only.Be sure to remove solder from all four reg. pins and clean/resolder.Replace 4amp fuse in power supply.

Sep 16, 2007 | Pioneer SD-P50A5-K 50" Rear Projection...

1 Answer

Problem with green color

One of your convergence IC's has burned out and needs to be replaced. If the green color is sagging from the top or bottom then the IC that handles the Green Vertical (GV) is bad, and if the green has moved inward on the left or right sides then the IC that handles the Green Horizontal (GH) is bad. Toshiba projection TV's typically use the STK392-110, and it is a good idea to go ahead and replace both IC's with the updated STK392-150's. If you do not have experience replacing convergence IC's then have a qualified tech handle it for you.

Jul 02, 2007 | Toshiba 40H80 40" Rear Projection...

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