Question about Mitsubishi WS-55805 55" Rear Projection Television
My bigscreen TV Mitsubishi model WS-55805 just lost the picture but sound still on. Before the picture went out, the picture was warped in the top part then it was squeezed down and finally blacked out. What could be the problem?
This problems,the 2 STK convergence ICS are dead,u discribe the problem before the picture is gone that great.That how I came to this conclusion.Must know how to solder,have tools relating to soldering to fix this problems.Must replaced 2 STK convergence ICS,and some or all it resistors.Tries websites like Tv repair World.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for parts and labors.
Posted on Apr 28, 2010
First thing I do on these is to disconnect power cord,pull off the front speaker grill and remove the small door covering the tubes. Get a bright light and look for coolant leaking down from the metal shields that cover the high voltage anode on the picture tubes. There is a chamber on each tube that contains ethylene glycol or antifreeze to keep the tubes from overheating. Sometimes the gaskets get a leak and coolant drips down onto the circuit board. Look very closely at the board to see if there are any drips below the tubes. If this is the case you may consider replacing the set but some can be saved by cleaning the board and sealing the leaks. Have a pro look at the tv if this doesn't help because all you can get online is a guess. Second thing that could cause this is a failure in the vertical or convergence circuit that would entail part replacement at a cost of 200-300. If you find no coolant on the circuit board that means the convergence circuit or the vertical circuit needs to be rebuilt. These sets are known for having bad capacitors on the boards that eventually have to be replaced when a failure occurs. Good luck, Russmann.
Posted on Apr 28, 2010
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Posted on Jan 02, 2017
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