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Sony KV27S42 no color

Discussion in 'Electronic Repair' started by [email protected], May 18, 2007.

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  1. Guest

    This TV went black&white suddenly. The color genration must be OK
    because the menus all appear in fine color.
    It is B&W both in tuner and monitor mode.
    Would appreciate any help.
    John Rakos
    johnATrakos.com
     
  2. Guest

    I dont know this set in detain, but the colour for the graphics is
    usually generated in the micro and has a different path. It is RGB.
    You really need a manual to trace the signal and an understanding of
    the video / chroma path. The video decoder IC or assiciated components
    may be the right place. It may also be a micro fault. I don;t know if
    this set has the vertical micro PCB (think it has the tuner on it) but
    they give a lot of trouble. If your really stuck, I will see if I can
    find a manual at work.

    Cheers

    Rod
     
  3. Jerry G.

    Jerry G. Guest

    This can be a fault with the colour demodulator section. You will need a
    solid background in TV servicing, the service manual, and a scope to
    troubleshoot it.

    I would suggest taking the set to a reliable service centre, or a Sony
    authorized service rep to have an estimate for the repair. I doubt you
    will fix this yourself.

    The reason for the display showing the fonts in green, is that the font
    generator in the uPC drives the green video channel only. The colour
    demodulation for the TV signals is done much farther back in the system.

    --

    Jerry G.


    This TV went black&white suddenly. The color genration must be OK
    because the menus all appear in fine color.
    It is B&W both in tuner and monitor mode.
    Would appreciate any help.
    John Rakos
    johnATrakos.com
     
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