Question about Toshiba 42H83 42" Rear Projection HDTV-Ready Television
Posted by Anonymous on
SOURCE: double imaging
The Toshiba 55H70 is a standard rear projection set. It does not have a "lamp", it has 3 picture tubes. When the colors suddenly do not line up on the screen, it means that one of your convergence output IC's has burned out and needs to be replaced. This is very common on those sets. If your set is using the STK392-110 IC's, it is probably a good idea to go ahead and replace both IC's with the newer upgraded STK392-150 IC's. The IC's should be replaced and the convergence circuits realigned by a qualified tech familiar with Toshiba projection sets.
Posted on Sep 11, 2007
The convergence amp(s) need to be replaced. Your unit takes two STK392-110 Sanyo built amps. In addition all the low ohm resistors should be tested for change in value and replaced as needed... Not an expensive repair for a qualified shop. We do four or five a week...
Posted on Nov 30, 2007
Your alignment is off. Go to the set up menu then convergence. hit right and you will be in the convergence menu. select the color that is not in alignment. The green line does not move. if blue and green are lined up the line will be cyan. if red and green are lined up the line will be yellow. when all three are lined up the color will be light. Best of luck!
Posted on Dec 09, 2008
This is a 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 charge between $200-$300
Posted on Sep 28, 2009
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