Question about Haier Televison & Video
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Posted on Jan 02, 2017
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
SOURCE: Panasonic Model No. PT-47WX42F
Replace the convergence amps. That unit takes two Sanyo STK392-110 and you could use 150's for greater reliability. Also replace one or more of the 1.2 ohm resistors in the yoke return circuit out front of the amps.
Posted on Mar 02, 2008
Either a bad optical block or possibly a bad LVDS cable, you need a qualified tech to know for sure
Posted on Oct 18, 2008
This television set, as well as most rear-projections, is prone to convergence driver problems. There are two large chips (STK392-110's) in the TV that need to be replaced, as well as some resistors that are likely damaged as well. Any competent TV repair shops should be able to repair this TV for 200-300 dollars. It is important to note that if the back of the TV is taken off without the proper prep., the Digital input (DVI) will be disabled permanently.
Hope this helps you...
Posted on Dec 30, 2008
Assuming that your TV is a rear-projection TV, then it sounds like the separate red, green & blue tubes aren't set correctly.
Each tube needs to be alligned exactly to produce the image on the screen. If any of the 3 are mis-alligned then the effect you describe is caused.
Somewhere in the menu settings, will be an option to set the Convergence. This option will allow you to set the allignment of all three tubes.
Older sets do not have this option, and need to be adjusted via controls on the main PCB.
Posted on Apr 25, 2009
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