Toshiba TP50H50 50" Rear Projection Television Logo

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Posted on Dec 09, 2007
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Convergence ic's what r the convergence ic's and how do u replace them?

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  • rbickle Jan 28, 2008

    Gentlemen,



    I have a toshiba model 50H81 CRT type rear projection TV. Just bought it second hand and it appears that the red tube is rotated slightly from the other two which causes the red convergence to be bad at the lower left of the screen. Adjusting the convergence on the menus works for overall convergence, but because of the rotation the red will always be misaligned at one corner or the other.



    I have removed the panels to be able to see the yokes of the tubes. The question is: what is the best way to rotate the red tube to get them all into alignment?



    Thanks,

    Rick

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Rafael Ortiz

Rafael Ortiz

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  • Expert 259 Answers
  • Posted on Dec 09, 2007
Rafael Ortiz
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Here is a very cool site the the convergence chips shown:

http://www.casiasfamily.com/repairlog/tp50h15.html

Here is a power supply tech manual:
http://tacpservice.toshiba.com/tacp/training/Module2.pdf

There are several circuits in the tv that will cause this. the most common on your model is a bad convergence circuit. a repair cost will range around 400.00 or so. it is a good model and worth a repair.

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3answers

Colored lines at top and bottom when tv comes on and seeing double vision in different colors at all times
If your tv is not a DLP the problem is in the convergence, try to adjust it using your original remote control go to the setting menu then to the convergence section. Adjust the red and blue convergence. you should move the red and the blue in up, down and left, right if this color does not move far enough your convergence IC is already defective. Replacing this convergence IC will solve the problem. In locating this convergence IC you should remove the back cover of your unit but be sure to unplug it before doing this. This convergence IC is attached to a large aluminum plate, it is the heat sink, and it has a marking of stk- ### followed by numbers. You can try to pull it out using a soldering iron and soldering pump but be careful you may damage the board and cause much problem to your unit. Or you can contact a technician to do it for you and save you from stress good day and best regards.
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Aug 28, 2011 • RCA Televison & Video
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When convergence output ICs got failed, tv shows double image or 3D like picture. Replace convergence output ICs in tv to fix the issue. Local tv repair shop will replace it for you.

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Jul 07, 2010 • JVC AV-56WP74 56" Rear Projection...
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Had convergence problem; replaced 2 stk392;
100% Ur 2 STK convergence ICS are still dead.Ur ICS soldering some how,u got the ICS shorted.Or ur ICS not right kind of STK ICS,u replacing in ur convergence board.
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Apr 07, 2010 • Panasonic PT-56WXF95 56" Rear Projection...
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Replaced convergence ic's...still a converg on Apex GB5108
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Mar 10, 2010 • Apex Digital GB5108 51" Rear Projection...
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My samsung rear projection tv has a problem with its convergence ic. i think theres two ics , but how do i tell which ic need replacing??
Always replace both once your going to the trouble each IC is usually less than $30.
This link will help show you what's involved.
convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

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Nov 13, 2009 • Samsung HLR5067WX 50" Rear Projection HDTV
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My Mitsubishi VS-50705 has an all over 3-D effect.
Yes it sounds to be convergence issue .

You have convergence problem in your tv . You need to replace convergence IC . YOu can get from the link below .

Convergence ICs

You need to replace both convergence ICs .It will cost you around $30 .
The IC number is STK392-110 .

Hope this helps .

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Mar 03, 2009 • Mitsubishi VS-50705 50" Rear Projection...
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My tv is showing a double picture in red
You have convergence problem in your tv . You need to replace convergence IC . YOu can get from the link below .

Convergence ICs

You need to replace both convergence ICs .It will cost you around $30 .
The IC number is STK392-110 .

Hope this helps .
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Good Day, harri1234;
Sounds like a convergence problem.
Convergence Output IC Failure
Corrective Action: Replace the defective Convergence Output IC Part Number 23905094 (STK392-110) using the revised “T” version IC Part Number 23135090 (STK392-110T). When Convergence Output failure is
detected, it’s recommended that both IC’s be changed to the “T” type IC
version.
Good Luck, Big Irish.
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Jun 23, 2008 • Toshiba 42H81 42" Rear Projection...
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A convergence IC has burned out. If I remember correctly, those Pioneer sets have one huge convergence IC, but that IC only has 5 channels in it so they use another smaller dual STK IC and one half of it is used for the 6th channel and the other half is the vertical output. Look on the convergence board, find the blue convergence jack, identify the blue horizontal channel, follow the traces and replace the IC handling the blue horizontal channel.
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The colors weren't lining up correctly on my HC-P4752W which is only about 30 months old. I did a little bit of research and got ahold of the people at http://servicemanuals.vstore.ca/ They recommended replacing the IC's as well as the IC resistors. I purchased the replacement parts from their site and made the repairs myself. I should mention that I didn't have any previous soldering experience. The repair was easy and a complete success. You may find replacement parts elsewhere for slightly cheaper but what you won't find is the prompt and detailed customer service that they provide. They gave me there # and said to call if I had any questions before or during repair. I took advantage of their services and got answers every time I called.
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