Question about Hitachi UltraVision 55HDS52 Television

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Power loss I was watching this TV, when all of a sudden it just went black. I checked all the normal things to no avail. I removed the back cover and checked the fuse. It's OK. When I plug the TV in three green diods turn on for a beief period. When the fourth green diode lights up, everything shuts down. My guess is that it is power related, not part of the audio ro video systems. But my knowledge is very limited. Can you tell me anything to look for? Local tv repair shops insist I take it in to their shops, but this is a 55" console, and pretty darn bulky to move. I would appreciate any help. Thanks!

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  • Bill Ritchie Jun 09, 2008

    I've had it unplugged overnight, and this morning, I get the same sequence of green lights going off on the power board as before. A clue I picked up was that it was very hot and humid when it turned off. If I try usng a fan to cool the power board down, do you think this will help?

  • Bill Ritchie Jun 09, 2008

    I just found the owners manual for this TV and the model number is 55UX58B, not the one I originally thought.

  • Bill Ritchie Jun 09, 2008

    I also read that convergence amplifiers (TK 391-110 there are two on this set, have a history of going bad and causing my symptoms. Does this make sense to you?

  • Bill Ritchie Jun 09, 2008

    that should read STK 392-110......soryy for the error

  • Bill Ritchie Jun 09, 2008

    I've had a fan on it for cooling purposes forthe last huor or so, and when I plug it in I get exactly the same results. I have read that maybe fuses E994 or C707 could cause the same problem I'm having, and not the convergent amplifiers. I can sppot the two fuses mentioned, but I cannot find the convergent amplifiers.

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Plug off the power for 24 hours

Posted on Jun 09, 2008

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  • dewan nafees ahmed Jun 09, 2008

    look for any bulged capacitors in the power board. but see if some light comes if u turn ON after 24 hours.

    may be due to some heating or leaking also.


  • dewan nafees ahmed Jun 09, 2008

    please dont forget to accept the solution if u go by it.

  • dewan nafees ahmed Jun 09, 2008

    ya try a fan externally to cool it off. if the heat keeps radiating then it may be due to some shorting.
    and if not u will have to install some heat dissipater's externally,


  • dewan nafees ahmed Jun 09, 2008

    that would be a last step.
    go step by step.

    first of all try cooling the unit.

    if u get fixed well and good.

    else next we will have to move for convergence amplifiers only


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