Question about Projection Televisions
OUR TOSHIBA HAS A DOUBLE VISION/BLURRIE PICTURE. THIS PROBLEM IS ALWAYS THERE. SOMETIMES THE PICTURE IS GREAT, BUT MOST OF THE TIME ITS BLURRIE/DOUBLE. LOOKS AS IF IT ALWAYS ON 3D!! ANY SUGGESTIONS? WE WOULD REALLY APPRECIATE ANY HELP WE CAN GET FROM ANYONE. THANK YOU!
Posted on Aug 11, 2007
Unplug the TV from the ac wall outlet for about 4 minutes then plug it back in and turn it on. If it still has a double image then tell me if it's affecting the menu screen from the TV (not the cable menu). And is the double image in red and blue?
Posted on Feb 18, 2008
The color has gone crazy on you because your convergence IC's have gone bad.
These IC's operate at a very high temp, and usually only last 4-5 years.
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-120's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months..
You will also need some "Heat transfer paste" - you can pick this up at radio shack.
Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go.
If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!
Hope that helps!
Posted on Dec 21, 2008
I am afraid you have the inevitable convergence problem. The 2 STK sonvergence ICs have gone bad. They are relatively inexpensive but the replacement procedure is pretty tough since you need to replace not only the ICs but also the nearby faulty resistors, capacitors etc., which have caused the failure of the convergence ICs in the first place. Please let me know if you have prior experience in fixing electronic stuff so that I can help you with this repair. Otherwise I can guide you to the nearest tv repair service in your area if you can get me the zipcode.
Posted on Dec 22, 2009
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