Images on screen are only shades of blue

SOURCE: TOSHIBA 65H82

you need to replace your 2-convergence ic's #STK392-110 you need to replace both ,,they are attached to 2 big heat sinks and identified as q-751 & q-752 you can get the ic's you need plus free tec support and installation instructions including pictures at the link I gave you.
http://servicemanuals.vstore.ca/

Sonny Berry

• 8617 Answers
• Posted on May 04, 2008

SOURCE: Toshiba 50H72 Rear Projection Television

You will need to replace both convergence ICs they are STK392-110 you can get replacement ICs at the following link and they will provide free instalation instructions with pics and also free on line tech support so you can do the repair yourself. Heres the link.
http://servicemanuals.vstore.ca/

SOURCE: Red color convergence on Toshiba 57H81

Often convergence issues do not require the entire board to be replaced. You can resolve it by replacing the convergence ICs. The part in question is STK392-110. You will need two of them and they cost around 10$ each. But replacing them is a pretty complicated procedure and I would not suggest it to someone without prior experience. A service manual should get you started in the right direction if you are planning to do this yourself.
https://www.completeservicemanuals.com/toshiba/crt-projection-television/57h81-service-manual/prod_1128.html

PS: Disconnect from the power supply before you start the repair. Also read the legend, the hv circuits are denoted by a special symbol, so you will know what you shouldn't touch.

You may also need to replace the nearby resistors that may have popped the IC in the first place. Read the service manual for further details.

Good luck,
Sai.

SOURCE: Touch Focus Error

57h82 uses two STK-392-110 CONVERGENCE chips---you need to replace both and check all the resistors around them---an open resistor means one of the chips failed.

You can buy both chips on Ebay for less than 12 dollars plus shipping--they are black--about 2 inches wide, 1 1/2 inches tall with 18 pins each and the STK number will be printed on the face of them in white letters; You need a good soldering iron, solder, a desolder braid, liquid flux, heat sink grease, denatured alcohol, and the ability to get at them: they are mounted to two side by side metal heat sinks with fins.

Once you locate them and unsolder them and the heat sinks from the board--replace both after cleaning the bottom of the board with denatured alcohol--removes any flux and solder particles---apply liquid flux before you unsolder them--these sets use lead free solder and the flux makes it easy to unsolder them. Once they are removed check all the resistors around them---one open resistor and the repair will not fix your problem---install the new chips with heat sink grease on them and install each chip/heat sink back into the circuit board.

Apply more flux to all the pins on each chip and solder them in----good idea to clean with denatured alcohol again and take a close look to make sure all pins are soldered and not touching each other.

If you get this far and the set now seems to work you need to use the original remote for the set and adjust the convergence--either in the customer menu or access the tech menu and adjust it there.


A service manual will not do you much good for this type of repair--it is a hands on repair.

I do this here for free, so if this has helped you take a moment and give me a vote here.


If you have any questions or need help contact me by replying to this posting.

SD TECH

Sonny Berry

• 8617 Answers
• Posted on Dec 02, 2009

SOURCE: Trying to manually fix color convergence on Toshiba 57H81

The convergence ICs and the six 1.8 ohm 1watt resistors need to be replaced. You can get the convergence repair kit for your model at www.tvrepairworld.com which has the Two Convergence ICs and the six resistors plus the CD with instructions on how to do the repair.

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