SAMSUNG L56A CHASSIS
Manual de Servicio

Alignment and Adjustments

5-5 Service Mode Adjustments
5-5-1 LCD Interface IC (CXA1853) Adjustment Values to be adjusted for each set
No. 0 1 2 3 4 5 6 Item main bright R main bright B main bright gamma gain1 R gamma gain1 B gamma gain1 gamma ctrl1 Range 63 63 63 63 63 63 63 Initial value 34 36 36 42 36 36 40 Description Adjusts for DC level of R,G,B signal before doing the gamma adjustment. The greater the value, the darker it gets Adjusts for DC level of R signal before doing the gamma adjustment. The greater the value, the darker it gets Adjusts for DC level of B signal before doing the gamma adjustment. The greater the value, the darker it gets Adjusts the gain of black side on the gamma curve (R,G,B) Adjusts the gain of black side on the gamma curve for R Adjusts the gain of black side on the gamma curve for B Adjusts the change point of the black side on the gamma curved line of R,G,B signal. The greater the value, the more the point moves towards black Adjusts the change point of the black side on the gamma curve for R. The greater the value, the more the point moves towards black Adjusts the change point of the black side on the gamma curve for B. The greater the value, the more the point moves towards black Adjusts the gain of white side on the gamma curve (R,G,B) reserved for R gamma gain2 (not used) Adjusts the gain of white side on the gamma curve B Adjusts the change point of the white side on the gamma curved line of R,G,B signal. The smaller the value, the more the point moves towards white reserved for R gamma ctrl2 (not used) reserver for B gamma ctrl2 (not used) Adjusts the gain of R,G,B voltage (applied to LCD) Adjusts the gain of R voltage (applied to LCD) Adjusts the gain of B voltage (applied to LCD) Adjustment for the brightness of R,G,B after doing the gamma adjustment. No change on the gamma curve. The greater the value, the darker it gets Adjustment for the brightness of R after doing the gamma adjustment. The greater the value, the darker it gets Adjustment for the brightness of B after doing the gamma adjustment. The greater the value, the darker it gets

7

R gamma ctrl1

63

36

8 9 10 11 12

B gamma ctrl1 gamma gain2 reserved B gamma gain2 gamma ctrl2

63 63 63 63 63

36 16 36 36 34

13 14 15 16 17 18

reserved reserved sub contrast R sub contrast B sub contrast sub bright

63 63 63 63 63 63

36 36 40 37 42 30

19 20

R sub bright B sub bright

63 63

34 37

5-4

Samsung Electronics