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Hitachi 51F500 rear projection TV problem

Discussion in 'Electronic Repair' started by Improv1, Jul 23, 2007.

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  1. Improv1

    Improv1 Guest

    I recently came into posession of the above TV (our neighbor wanted t
    upgrade). When you turn on the power, you can hear the TV startin
    up, then all becomes quiet, except for three LEDs blinking on an
    off. They are all on the centre pcb; two are green, one is red.
    Anyone with any ideas on this issue, please give me some advice.
    Barring that, if anyone knows of a downloadable tech service manual
    I would appreciate it. The nearest shop to me is an hour away, an
    the TV is a monster to move
    Thanks
     
  2. Meat Plow

    Meat Plow Guest

    Have you the skill and equipment to work on complex electronic components?
    You might try https://www.manualsparadise.com/MainSearch.do for your
    manual.
     
  3. Improv1

    Improv1 Guest

    Thanks for the input! The $30.00 US is the most expensive I've seen
    but will be worth every penny if they are a trustworthy retailer.
    Before I purchase anything, I will try a fix that I saw on this site
     
  4. Dave

    Dave Guest

    Does the fix involve incantations, bat wings and eye of newt? Some
    proprietary "tool" sold by the site owner?

    How can you possibly try to "fix" something when you have no idea whatsoever
    what may be "broken"?

    Just curious.

    Dave
     
  5. hr(bob)

    hr(bob) Guest

    Me too!!!

    H. R. Hofmann
     
  6. Improv1

    Improv1 Guest

    Thanks to those who have posted similar problems in the past, an
    those who have been helpful in resolving them, I have a pretty goo
    handle on what the problem is, and have confirmed this throug
    testing. There is no need for eye of newt, nor batwings... or eve
    bitchy responses to my post. I don't know your qualifications, no
    do you know mine.
    Thank you to those who made this a positive experience
     
  7. Guest

    Hello, it is a shame that people havt to be so to say, Jerks, to put
    it mildly, from the replied postings I just read for your problem, I
    have the same problem with a set I am working on for a customer, what
    is happening is the shutdown circuit is detecting something wrong,
    ether no vertical or horizontal deflection or convergence IC's could
    be shorted (STK392-110) this is done to protect the phosphor on the
    tubes from being damaged. The LED's on the power supply board are
    there to indicate certain voltage presence on the secondary of the
    switch mode supply. If you are missing any voltages or have lost
    deflection, the set will come on with high voltage and immediately
    shutdown. I do not have a solid answer for you cause it could be many
    things, I would start with the convergence IC's. My set stays on long
    enough to see an image in the tubes, so I have deflection. I have
    replaced the convergence IC's and was not the problem. If any kind and
    humble person has seen this problem and knows what is the problem, it
    would be beneficial to myself and all that have posted here. I have
    repaired a set with a similar problem by replacing the deflection
    board, but that's a $300 fix just for parts. And I dont need
    incantations, bat wings and eye of newt. Not in my tool box. An ESR
    meter is handy though.

    Thank you

    Ken
     
  8. Improv1

    Improv1 Guest

    Thanks Ken. Yours is the type of response I was hoping for in a Tec
    HELP forum. I have been working extra hours (plant shutdown... we i
    the mechanical department are swamped with jobs) and haven't had
    chance to get too deep into the TV. I will post my solution when th
    unit is up and running again
     
  9. intrepid

    intrepid

    2
    0
    Jan 17, 2010
    You can also try manualuniverse.com , they have many repair manuals at reasonable prices.
     
  10. intrepid

    intrepid

    2
    0
    Jan 17, 2010
  11. GregL

    GregL

    2
    0
    Nov 7, 2010
    I have a simular issue - Hitachi 51G500, no picture, no sound, red power indicator lit. On Power Supply Board 3 solid green lights, 1 flashing green light. While watching TV the other day raised volume and TV went black with no sound. Has been having convergence issues. Purchased and replaced convergence ICs. Did you ever resolve your issue, any advice is appreciated.
     
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