SAMSUNG K55A CHASSIS
Manual de Servicio

Alignment and Adjustments

4-1-3 Screen Voltage Adjustment
1. Input a Toshiba pattern. 2. Use an oscilloscope to identify RK, BK, GK. And then adjust FBT Screen VR so that the voltage of pedestal level doesn�t exceed 160V. If a Toshiba pattern is not available, cancel the blue screen and input �No Signal� to AV IN so the voltage of pedestal level doesn�t exceed 175V. If an oscilloscope is not available, use a DC multi-meter in No Signal (black screen) to adjust RK, BK, GK so that the highest voltage becomes 160Vp-p.

4-1-4 White Balance Adjustment
1. Warm up the TV set for at least 30 minutes. 2. Enter the Service Mode by pressing the remote control keys in the following sequence: Power Off © Display © Menu © Mute © Power On 3. Initialize all set data. 4. Input a Toshiba pattern. 5. Using a probe(CA100), do the White Balance adjustments. (1) Adjust Low-Light. - Adjust Sub Brightness to set Y. - Adjust B Cutoff to set y. - Adjust R Cutoff to set x. (2) Adjust High-Light. - Adjust Sub Contrast to set Y. - Adjust B Drive to set y. - Adjust R Drive to set x. (3) Check the value of Low-Light. If necessary, readjust Low-Light. (4) Check the value of High-Light. If necessary, readjust High-Light.15

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