Question about Toshiba TW40X81 40" Rear Projection Television
If Red will not move far enough you have one of three things wrong----if the two convergence chips have never been replaced--they are Q751 & Q752 and are black in color---
About 2 1/2 inches wide X 1 1/2 inches tall and mounted side (ON LARGE METAL HEAT SINKS WITH FINS) and they will have the STK-392-110 PRINTED ON THEM IN WHITE.
Either one of them is bad, or one of the 1.8 ohm resistors around them is damaged and off value OR you have a problem in the digital convergence unit--it stores and controls all the convergence adjustments.
I suspect based on your description one of the two chips damaged one of the protect resistors---
You can if you are able to do the repair yourself buy a pair of the chips on Ebay for about 12 dollars plus shipping--I do this for a living and have repaired hundreds of sets with convergence problems.
Let me know if you have questions or need advice--I am here to help people.
If this information helped you, rate this solution as I do this here for FREE.
Posted on Nov 20, 2009
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Posted on Jan 02, 2017
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