Question about Hitachi 53FDX20B 53" Rear Projection Television

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I BOUGHT TV NEW IN 2003, IT'S BEEN A OUTSTANDING TV UNTI RECENTLY, IT HAS DEVELOPED A BLUE COLORED SHADOW NEXT TO THE MAIN PICTURE SUCH AS A PERSON'S HEAD THERE IS NOW TWO HEADS. ONE REGULAR AND ONE BLUE TINTED. I HAD A SEARS TV MAN OUT & HE SAID I NEEDED NEW PROJECTION BULBS BUT IT WOULD BE A TEMPORARY FIX AND IT WAS VERY EXPENSIVE-CAN YOU TELL ME WHAT BULBS I NEED? AND DO YOU SELL THEM?

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  • dean_w_l Nov 18, 2009

    I NEED HELP IN IDENTIFYING WHERE TO GO TO GET INTO THE PROPER CIRCUIT BOARD, ARE THERE ANY SPECIAL PRECAUTIONS I NEED TO KNOW IN REMOVING & RE-SOLDERING THE IC, WHERE DO I GET THE CHIP, CAN I PURCHASE IT THRU YOU, IS THERE ANY RE-ALIGNEMENT I NEED TO DO? I AM NOT A TV REPAIRMAN BUT I WORKED MOST OF MY LIFE IN THE TELEPHONE SYSTEMS TECHICNAL FIELD, BUT I HAVE BEEN RETIRED SINCE THE EARLY 80'S SO THAT WAS A LONG TIME AGO, THE SET IS A HITACHI PROJECTION COLOR TV # 53FDX20B.

    THANK YOU FOR YOUR HELP AND I WILL BE WAITING TO HEAR FROM YOU.

    DEAN LUDWICK

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If it is Hitachi 53FDX20B, then symptom shows TV has convergence out IC failure problem that need to be replaced.
Convergence out IC is not so costly chip and a person that can solder parts in circuit board can replace it with soldering tools.
If TV model number is other than that mentioned, post back with correct model written at back to provide you helpful info.
Thanks.

Posted on Nov 18, 2009

  • Shahid Electronics
    Shahid Electronics Nov 18, 2009

    I NEED HELP IN IDENTIFYING WHERE TO GO TO GET INTO THE PROPER CIRCUIT
    BOARD, ARE THERE ANY SPECIAL PRECAUTIONS I NEED TO KNOW IN REMOVING
    & RE-SOLDERING THE IC, WHERE DO I GET THE CHIP, CAN I PURCHASE IT
    THRU YOU, IS THERE ANY RE-ALIGNEMENT I NEED TO DO? I AM NOT A TV
    REPAIRMAN BUT I WORKED MOST OF MY LIFE IN THE TELEPHONE SYSTEMS
    TECHICNAL FIELD, BUT I HAVE BEEN RETIRED SINCE THE EARLY 80'S SO THAT
    WAS A LONG TIME AGO, THE SET IS A HITACHI PROJECTION COLOR TV #
    53FDX20B.

    THANK YOU FOR YOUR HELP AND I WILL BE WAITING TO HEAR FROM YOU.

    DEAN LUDWICK
    ================================================================

    Get back to you with details.
    Thanks.



  • Shahid Electronics
    Shahid Electronics Nov 18, 2009

    I NEED HELP IN IDENTIFYING WHERE TO GO TO GET INTO THE PROPER CIRCUIT
    BOARD, ARE THERE ANY SPECIAL PRECAUTIONS I NEED TO KNOW IN REMOVING
    & RE-SOLDERING THE IC, WHERE DO I GET THE CHIP, CAN I PURCHASE IT
    THRU YOU, IS THERE ANY RE-ALIGNEMENT I NEED TO DO? I AM NOT A TV
    REPAIRMAN BUT I WORKED MOST OF MY LIFE IN THE TELEPHONE SYSTEMS
    TECHICNAL FIELD, BUT I HAVE BEEN RETIRED SINCE THE EARLY 80'S SO THAT
    WAS A LONG TIME AGO, THE SET IS A HITACHI PROJECTION COLOR TV #
    53FDX20B.

    THANK YOU FOR YOUR HELP AND I WILL BE WAITING TO HEAR FROM YOU.

    DEAN LUDWICK


    There are two big black ICs mounted on aluminum heat sink, these are convergence out ICs that need to be replaced. These are mounted on main board and number would start with STK392-xxx, very easy to recognize.
    Below image shows location of ICs


    STK392-150 are available in Part Store, please click that link to see IC image and price info.
    No adjustment is required after replacing above ICs because ICs become bad and causing problem.
    In above picture you see few low ohms resistors, please check and if found color faded or sounds heated, replace them as follows..



    Hope above info will help you repair this TV.
    Thanks.





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