Sony SDM-N50R Service Manual page 18

• • • • • White balance adjustment
When no measuring instrument is used, compare the color
with the reference set so that the colors will be the same.
1. Adjustment of 9300°K
(1) Confirm every R/G/B_USER_BKG are initialized value.
(2) Receive MODE 15 (1024X768 60Hz) 80IRE.
Set COLOR to 9300°K. (COLOR_INDEX=1)
(3) Make adjustment with R/G_USR_DRV to set the
chromaticity within the specification.
y adjustment Make adjustment with B_USR_DRV.
(Also x value changes simultaneous)
B_USR_DRV UP Values x and y decrease.
B_USR_DRV DOWN Values x and y increase.
x adjustment Make adjustment with R_USR_DRV.
R_USR_DRV UP Value y increases.
R_USR_DRV DOWN Value y decreases.
Adjust again and bring down G_USR_DRV 10 STEP to
become within the specification ; however, in case of
adjustment range of y value become deficientlly and when
B_USR_DRV=255.
(4) Make the signal 30IRE all white to check that it is within
the specification.
(5) Adjust R/B_USER_BKG to become within the specification
when (4) deviates the specification.
(6) Input a grayscale and perform picture quality
confirmation.
7) Perform color save ( select C with ALT+M ).
(
Spec: 9300°K 80IRE (x, y) = (0.285, 0.294)
Within 3JND
9300°K 30IRE (x, y) = (0.265, 0.268)
Within 4JND
Make adjustment up to ±0.002.
Note:
2. Adjustment of 6500°K
(1) Confirm every R/G/B_USER_BKG are initialized value.
(2) Receive MODE 15 (1024X768 60Hz) 80IRE.
Set COLOR to 6500°K. (COLOR_INDEX=2)
(3) Make adjustment with R/G_USR_DRV to set the
chromaticity within the specification.
y adjustment Make adjustment with B_USR_DRV.
(Also x value changes simultaneous)
B_USR_DRV UP Values x and y decrease.
B_USR_DRV DOWN Values x and y increase.
x adjustment Make adjustment with R_USR_DRV.
R_USR_DRV UP Value y increases.
R_USR_DRV DOWN Value y decreases.
Adjust again and bring down G_USR_DRV 10 STEP to
become within the specification ; however, in case of
adjustment range of y value become deficientlly and when
B_USR_DRV=255.
SDM-N50R(E) 2-2