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I have a samsung flat screen (not flat panel) HDTV type # CR32z30; which will automatically shut off after about an hour or so of operation, and stay off for some time. It seems to be influenced by heat or temperature.

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I would need to know the correct model number to help you.

Posted on May 12, 2008

  • ron347m Jun 26, 2011

    Check the B+ voltage, it should be 145V. If it is higher (mine was 162V) then R818 (140k) has increased in value. That resistor has 140V across it and is part of the 145V supply feedback.
    The 145V feedback is a simple divider to a TL431 and opto-coupler.

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