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Sony projection TV.

Discussion in 'Electronic Repair' started by Dani, Apr 25, 2007.

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  1. Dani

    Dani Guest

    Got a call on a Sony Model # KP-43T75, had a blue halo around objects
    in the pix, now it's dead. Are these sets known for bad CRT's? If so,
    do the CRT's kill the set? Thanks, Dani.
     
  2. Get a better description of "halo" from your client. That description could
    be anything from convergence to focus issues to CRT coolant. Most common
    would be convergence outputs, but I would not descrivbe the symptom as a
    halo.

    I have not seen bad CRTs in this model.

    Leonard
     
  3. Why don't this asshole just have his client draw you a picture of it,
    asshole?

    Go suck a dick in prison.
     
  4. Art

    Art Guest

    Check the pico fuses on the "G" power board and on the "D" deflection
    boards. If either of the 5 amp are blown on the "G" board then you are
    fairly certain the STK devices on the "D" board are failing. Then check the
    3 amp at the STK devices and change both of ics. The pico fuses on the "D"
    board are the main protects for the +/- supplies to the STK ics.
    As Leonard noted, try to get a better idea of the symptom, may even be
    failure of the actual blue crt causing shutdown, a very common problem on
    the RA-6 and DA-4 chassis. BTW these blue tubes are no longer available, may
    find a source at VDC to rebuild the original. Finding he blue tube defective
    it is highly recommended to also check the green and red tubes, lightly
    tapping the neck of the crt and watching a blank raster [unused video input
    works well] to see if there is any flashing exhibited on screen while
    tapping on the crt necks. Some of the green crts are also becoming nla so be
    sure to check availability.
     
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