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My samsung cr32z30 32" hdtv turns off automatically after running for about 30min to an hour. also the picture is curved on both sides when watching tv in 4:3 ratio. the curve is most prodominate at the top curving inward, with slight curvature on the bottom. also when the video source turns bright, the picture trys to readjust itself in size.

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Linearity coil (there are several) shorted causing HV to increase and causing HVSD, no replacement parts available. Replace sweep module to fix.

Posted on Apr 07, 2009

  • ron347m Jun 26, 2011

    For the auto shut off, 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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