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TOSHIBA 50A9UA REAR PROJECTION TV Fault: No Pix. HT present and horizontal line for split second only at switch off. Checked voltage at each pin of Frame Output IC and found all missing or very low, less than 1v. I do not have schematic diagram for this set and would appreciate any lead as to possible open circuit supply resistors or other cause. Thank you in advance

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  • thedom_1 Aug 27, 2010

    Thank you for your attempt at answering my question, I am myself a TV Tech but did not have a schematic for this one. I have since found the problem as first suspected by me, two open circuit fusible links in the Power Supply for the 16v


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Ic Shorts can be detected by placing one of the multi-meter probes on the common ground and the other on the Vcc Pin of the IC. I suggest that you start with the voltage regulator ICs.

Posted on Aug 19, 2010

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