Since last sunday I have received 5 Lcd Tvs all with odd screen distortions all caused by the As15 Ic gamma reference voltage Ic failing. All of the tvs showing different symptoms of failure. Heres what I have had:
Samsung LE32M88BD Hd Lcd, screen had grey hazy boarder around any moving image. As15-F Ic voltage variating abnormally. Replaced and image perfect.
Samsung LE32R73BD, washed out solarized/distorted image, after tv heated up solarization cleared. Found that gamma voltage started very low then raised, however all input voltage to As15 was normal indicating intermittent Ic failure. Replaced and Tv works fine.
Samsung LE37M88BD, red distorted image with small columns spread across horizontal length of screen. Gamma voltage was 0v however input was normal, As15 was also abnormally warm. After replacing the Ic red distortion and small bars cleared up, however the was a line still out on the Lcd meaning it has failed.
LG 37LH3000, total white screen no with faint image visible in background. As15 voltages at 0v input ok. Replaced image is perfect.
Bush 42" HRT chassis with Auo screen, washed out image. As15 output 0v input ok. Replaced and tv works.
Phew what a week or AS15 (F,H,G) failures ohh well at least I have mastered replacing these. Now time to sort the other 4 customer repairs that need looking at phew
Samsung LE32M88BD Hd Lcd, screen had grey hazy boarder around any moving image. As15-F Ic voltage variating abnormally. Replaced and image perfect.
Samsung LE32R73BD, washed out solarized/distorted image, after tv heated up solarization cleared. Found that gamma voltage started very low then raised, however all input voltage to As15 was normal indicating intermittent Ic failure. Replaced and Tv works fine.
Samsung LE37M88BD, red distorted image with small columns spread across horizontal length of screen. Gamma voltage was 0v however input was normal, As15 was also abnormally warm. After replacing the Ic red distortion and small bars cleared up, however the was a line still out on the Lcd meaning it has failed.
LG 37LH3000, total white screen no with faint image visible in background. As15 voltages at 0v input ok. Replaced image is perfect.
Bush 42" HRT chassis with Auo screen, washed out image. As15 output 0v input ok. Replaced and tv works.
Phew what a week or AS15 (F,H,G) failures ohh well at least I have mastered replacing these. Now time to sort the other 4 customer repairs that need looking at phew

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