Question about Toshiba 57H83 57" Rear Projection HDTV
The set is 5 yrs old. It has been moved away from the wall and back in order to re-set due to lock in pictures. Now, the red color is separated from the blue & white. We have tried the touch focus several times and that didn't work. We aren't able to adjust manually as the arrows on the remote will not move the lines to bring the colors together.
This model was first made in 2003 and if red or blue will not adjust in some direction---one of the two convergence IC'S is likely bad (there may be some resistors around them that are burnt--they are protection parts)
This set uses 2 STK394-250 IC'S for this circuit.
Both chips should be replaced and any bad resistors as well. This set is not real easy to do this repair on and even some techs I know don't like to work on them.
You should shop around your area as most shops charge 300-400 for this kind of repair---the right kind of shop MAY be able to fix this right in your home---I have done hundreds of sets with this problem--repair usually takes about a hour---some take more time than others.
If you cannot do the repair yourself, shop around and see if someone there will do it for a reasonable price--I do lots of them here for 200-250---If these are not viable options for you it may be time to consider replacing the set
I hope this information helps you and if you have ANY questions or need advice contact me here.
REGARDS, SD TECH
Posted on Sep 25, 2009
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Posted on Jan 02, 2017
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