Question about Mitsubishi WS-55511 55" Rear Projection Television

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Auto Shut Off

Originally, video went out sound remained on. Cycled power, now TV shuts off automatically after a few seconds without audio/video ever comming on. Picture going out with audio on makes me think it is a HV problem and that now the power supply is in an autoprotect mode, shutting the tv down during a power ON selfcheck. Any feedback is appreciated.

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  • EEPE Aug 18, 2007

    I already have the manual. Thanks. The diagnostic says error 22, Short. I tracked down 2 bad components. D9A60 & F9A04 both in the +24V supply. C9A68 is also questionable. This supply feeds IC8C01 (Convergence Amplifier) which appears to be the culprit. When I took board out of the set, I found fluid on the board and the leads on IC8C01 have separated from the die. What is the fluid? Only thing I can think of is the CRT coolant. Any other possibilities? If it is the coolant, is this something a skilled do-it-yourselfer (Professional Electrical Engineer) can tackle or are there special tools required?

  • Anonymous Mar 31, 2014

    My TV is not wokring at all, I can power on, in about 2-3 seconds it makes a sharp buzzing/Shocking sound and turns off. What could this be?

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It is a possibility, bu there is a self diagnostics on the TV set to help guide you to the problem. I do have this service manual that will assist you to service the problem you have. That's a bargain. This manual is normally 25 bucks! The self diagnostics in on page 30 of the service manual. Please leave an e-mail address if you wish to receive the manual. It will not fix your set, but can get you on the path to a repair. Good Luck

Posted on Aug 18, 2007

  • Larry  Dillon
    Larry Dillon Aug 18, 2007

    Yes great guess on the fluid. You will need to take the board out asap and wash the board off really well as this fluid will corrode the board really bad, and after a while the traces will burn off the board. The fluid leak if not a really bad one can be left alone as long as the fluid loss does not affect how the picture looks. You will have to wait for the set to work before you decide if the picture on the leaky tube is causing a color shadow in the picture. If that is the case, the tube will need to be removed from the set, the fluid drained, the lens assembly removed and you will need to obtain a new "O" ring to seal the fluid into the tube. You can get the coolant fluid from mcmelectronics.com Just go to the site and under search, type in coolant fluid. You can also get the right replacement IC's for the convergence there as well. Do not go for the least expensive, as most sites carry the cheap aftermarket IC's and they do not always have the same specs as what the manufacturer calls for. Now if the fluid is just a small leak, Hitachi and Mitsubishi uses a flat piece of plastic under the picture tubes to redirect the leaking fluid. Let me know if you need any further assistance.

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