Question about Toshiba 36HF71 36" TV

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Pink hue to picture - Toshiba 36HF71 36" TV

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Pink hue picture denotes the absence of green colour. Check the green video output transistor for open. It can be easly recogansized by taking the voltage at the collector point of that transistor. It will be high, almost equal to its supply voltage. Measure the base voltage of that transistor also. If there is no base voltage the symtom occurs. if it is so trace the track and reach to the green output pin of the related ic. If there is also no voltage, Ic may be fault. on the otherhand check the green cathode of the CRT is ok. It is quite easy. Detach all the components related to that pin, or make a temporary cut to isolate the green cathode. The switch on the set. If a green colour [High intensity] perists, the CRT is ok. You can check it in an other way. Take a 2W resistor fo value 470k or more, connect its one end to earth point, and other to the green cathode pin [Just Touch and Out], a green screen will flash on the screen. If these to checks fails, CRT is faulty.

Posted on Oct 14, 2010

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