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Replaced both convergence chips in my Toshiba rear projection hi def. I still have no side to side movement of my red. blue works great & red up & down works. now what should i do. I checked all the fuses I could. lots of work to do the chips & very frustrated. please help.

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Hi Tom,
Check the resistors around the convergence board, it has some open resistor that's why you encountered this kind of trouble. Some of the resistors indicated/printed the actual resistance value in its body but also there is a color coded value in that board.You must know how to read the color code to determine the exact value of it. Click this LINK to guide you in resistance reading.
Hope I helped you.
Have a nice day!

Thanks for using Fixya.

Posted on Mar 26, 2011

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1 Answer

The picture is warped red & blues distorted


Your Convergence ICs have failed. It is very common on rear projections. The solution is to replace the STK chips, check fuses and the resistors next to the STK chips. Replace as necessary and re-align via the service menu. It is about a $300 repair at a tv service center. You will need the service manual if you decide to do this yourself.

Try This:
When you notice the symptons Use this simple test to verify.
Go to the users menu on the tv.
Look for the converge option probably under setup or video setting. Converge is short for convergence to align the red and blue colors to the green color.

If you cannot move the red either horizontal or vertical, then the STK chip has failed for red section.
If you cannot move the blue either horizontal or vertical, then the STK chip has failed for the blue section.

If you can move both in each direction then the problem is something else.


Note if one STK chip fails, you replace both regardless. They will be right next to each other.

Feb 20, 2011 | Toshiba 57H81 57" Rear Projection...

1 Answer

I have a toshiba tv model tp50g90 I have replaced the convergence chips stk392-110 convergence was corrected but I have a problem yet red not managed to focus on the user menu in the option of...


Thats the way it works. You have to adjust the other colors to the red. You adjust the red from the back of the set using the convergence magnets on the tubes. Then you adjust the other colors to match the red. It's much easier if you have the plastic screen from Toshiba used to align this set.

Feb 20, 2011 | Toshiba TP50G90 50" Rear Projection...

1 Answer

Blue shades on left side of the screen


Hello seems like u have a convergence problem if the colour red /blue /green around the outside of people or objects in one of these colours the convergance chip will need replacing but u can also check in your menu to see if this can b ajusted by remote only sometimes .

Apr 11, 2010 | Toshiba 43A10 43" Rear Projection...

1 Answer

Lost tracking on bottom, blue &red won't line up with green causing double lines on bottom, area's 7,8,9


It sounds like a convergence problem; in the customer menu there is a way to confirm----if red or blue are skewed and will not adjust in some area of the picture you need to replace both convergence chips--the model indicated uses two of the STK-392-110 chips.


Not the most easy set to do this repair on; involves getting at them and replacing both.

Total parts cost should be under 30 dollars on Ebay.

SD TECH

Mar 08, 2010 | Toshiba 55H70 55" Rear Projection...

1 Answer

Red vert lines will not convergenge(sides) blue and green o.k.


your convergence output amps are done...
you have to do repair on the convergence output circuit, and inspect
the power supply for any damages.

Jan 21, 2010 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

Toshiba 43HX70 convergence problem


One or both of the STK convergence chips have probably failed.

I can give you guidance on this if you are confident to do the repair. I had the same problem with my Tosh 40WH08B and after replacing these chips it works like new.

May 21, 2009 | Toshiba Televison & Video

1 Answer

Blue spot on screen


Hi. this is called convergence failure. the convergence board is a circuit board that regulates the RGB(RED BLUE GREEN) streams that make up the color picture. If the convergence board chips are malfunctioning, you will see a distorted view of these RGB streams. This is what you are experiencing at this time.

Simply replacing the convergence board or chips will fix this issue.

Please rate and have a great day:)

May 17, 2009 | Televison & Video

1 Answer

Replaced ic chips and still have red convergence problems


convergence resistors they can often be burnt open when the ICs go out.

Aug 12, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Toshiba 65H81 convergence issue


Does the blue and red crosses move at all ... eather vertically or horizontally. if they move at all then it may not be the chips.. could be a resistor. if the crosses dont move then it probally the ic. these chips run about 7 to 45 dollars apeace depending on type. at our shop we charge around 125 to put in.

Jan 15, 2008 | Toshiba 65H81 65" Rear Projection...

1 Answer

Toshiba 42H82 convergence problem


Replace STK convergence IC's w/OEM or better parts.Senior tech soldering ability needed. Ex==Steel jumper wires feeding b+ to conv. IC's need resolder to prevent call-back.Also, best re-alignment done in service mode==consult service literature.

Sep 19, 2007 | Toshiba 42H83 42" Rear Projection...

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