Question about Mitsubishi VS-5075 50" Rear Projection Television

1 Answer

Mitsubishi VS-5075 When I plug in the tv I hear a click from a relay on the left hand side of the motherboard (viewing from the tv from the back). The two relays on the (standing vertical sub power board) are not clicking/energizing. The green led on the front of the tv comes on and slowly fades and goes out. No picture or sound?????

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  • Mason kid Jun 16, 2008

    I should have said earlier that I have no blown fuses. The regulator that I have ordered is on the Sub Power board STR M6 543. Is this the regulator that you are talking about or is there another one because in your answer you stated regulators?

  • Mason kid Jun 16, 2008

    I was not able to buy a service manual from you guys, I had to go to Mitsubishi to buy one and I have not received it yet. I'm not positive that, that regulator is bad. It has done alot of work and the pc board is discolor from the heat. I do have 162 volts coming out of the regulator and then goes to a cap. off of that pin of the regulator. When I measure the voltage on one side of the cap. I have the 162 volts and the other side of the cap. I have nothing. Is the cap. bad or the regulator?

  • Mason kid Jun 16, 2008

    I don't recall the rating but will pull the cap. when I get home and stop at supply house tomorrow and buy one and replace it and see what happens. Its a standard cap. and not an electrolytic. I will let you know the outcome and thanks for the great help.

    J.

    I did pull it from the circuit and tested it with a meter that has a cap. checker and it showed 0.1.

  • Mason kid Jun 16, 2008

    I going to replace it, like you said its cheap. It probably needs it anyway because of the heated area. Will let you know.

    THANKS!!!!!!!!!

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  • Mitsubishi Master
  • 8,617 Answers

Your standby power supplies are most likely at fault you should check the low voltage regulators and see if they are functioning they may be defective.

Posted on Jun 16, 2008

  • 2 more comments 
  • Sonny Berry
    Sonny Berry Jun 16, 2008

    Theres a couple of regulators, but if that one was defective that would no doubt be the problem, as the regulators run independant of each other by regulatings its own circuit, so the chances of two sepaerate regulators being blown is almost non existant. I just wasnt aware that you had already found a defective regulator.

  • Sonny Berry
    Sonny Berry Jun 16, 2008

    162 volts should charge the capacitor and then the capacitor will discharge when its fully charged there is no way to check the capacitor in circuit unless you have a ESR meter, you can check it out of circuit though. Whats the rating on the capacitor as your probably looking at a 2.00 part if its a standard cap at radio shack its often easier to just replace the capacitor if you dont have an ESR meter.

  • Sonny Berry
    Sonny Berry Jun 16, 2008

    Its probably good then if its a non polarized cap

  • Sonny Berry
    Sonny Berry Jun 16, 2008

    Youre welcome, and yes let me know how you make out.

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