Question about Toshiba 53H71 53 in. Rear Projection Television

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Changed my stk 392 150 ( both ) did not correct problem - HELP!

I changed my stk 392 150 both of them. My image is worse. Instaed of 3 D its all rainbow like. Can not even read to get to the cross hairs. Still get the Touch Focus Error. HELP Now What?

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Re: Changed my stk 392 150 ( both ) did not correct ...

There are 3 low ohmage 2 watt resistors
for each stk chip, did you change those?
with-out those it may very well look worse!

Posted on Feb 22, 2011

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Re: Changed my stk 392 150 ( both ) did not correct ...

Make sure you have the three connectors that go to the convergence yokes to the proper spots, otherwise it will look worse.

Posted on Feb 13, 2007

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If it looks 3d you have a convergence problem.

This model should use two of the STK-392-560 convergence chips for this circuit.

Both will have to be replaced and a few other easy to check parts tested also.

If you have some expertise or have a friend who does I can step you thru the repair.

Parts cost will be if purchased on EBAY (I have seller I can recommend there) under 30 dollars total.

Let me know if you have questions and thank you for using FIXYA.


May 21, 2010 | Sony KP-65WS500 65" Rear Projection...

1 Answer

What is STK ICs?

STK-series integrated circuits are amplifier IC's that are most often used in projection TV sets as convergence output amplifiers. When these or other convergence parts fail, the three color images no longer line up correctly on the screen.

Jun 17, 2009 | Panasonic PT-56WXF95 56" Rear Projection...

1 Answer

Problem with stk's & low olm resistors on 55 in. Sharp

It's always best to remove one leg, however there tolerance is so close you should be able to get an exact ohm reading, and I mean exact. Some are connected in parallel so if they're 6.8 ohm then you'll read 3.4. What is the number of the STK's you changed?
Yes, I would replace them again.

Feb 27, 2009 | Sharp 55R-WP4H 55" Rear Projection...

2 Answers

Seeing triple red,blue,green

you have proble with the convergences ICs if the tree colors are at fault then also check your power supply voltages the polarization resistors

Feb 08, 2009 | Panasonic PT-53TW53 53" Rear Projection...

1 Answer

Pioneer sd-533hd5, STKs changed, getting blue screen but not pict

Did you have double image before changing the stk's ? If not then there was no need to change them.. Pioneers are known for bad solder connections especially in the power supply section.. suggest checking that when you changed the stk's that there are no solder bridges between the pins of either stk ICs

Dec 22, 2008 | Pioneer SD-533HD5 53" Rear Projection HDTV

2 Answers

I'm experiencing different colors on the tv when displaying an image.

If these colors appear to be like a 3-D image, the problem is in the convergence circuit. Please update this with the make and model and I will provide you with further information and instructions.


Sep 24, 2008 | Projection Televisions

1 Answer

Light blue banded on screen projects the image double

change the stk you have problem with convergence & change the resistor burned near stk R =2.2 ohms adjusment convergence wiht menu

Sep 12, 2008 | Projection Televisions

1 Answer

Sony KP-57WS500

did you replace or check the 4.7 ohm 1/2 watt resistors or the 6 pico fuses when you changed ICs? If not thats most likely your problem.

Jun 21, 2008 | Sony KP-57WS500 57" Rear Projection...

1 Answer

3D image

you have to replace all 3 ic's and 2 are stk 392-110 and the 3rd one is stk 392-150 they are located on the extreme right of your tv on a long heat sink all 3 are located there.You can get replacements as well as free tech online support at

Apr 10, 2008 | Hitachi 51UWX20B 51" Rear Projection...

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