Samsung LB15VS Service Manual page 17

4-3-2 (b) WHITE BALANCE ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15"
68 kHz/85 Hz : 17"
Display image: White box pattern
Brightness: 0.06ft-L at Back Raster
Pattern Display
Contrast: Maximum
1/3H-1/2H
1/3V-1/2V
Figure 4-6. White Box Pattern
1. Use control bar after selecting "RED GAIN",
"GREEN GAIN" and "BLUE GAIN" to adjust the
luminance 47 ± 1 ft-L(15"), 42 ± 1 ft-L(17") with
the color coordinates ranged for 9300K to x =
0.283 ± 0.02, y = 0.298 ± 0.02.
4-3-2 (c) ABL ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15"
68 kHz/85 Hz : 17"
Display image: Full white pattern
Brightness: Maximum
Contrast: Maximum
Figure 4-7. Full White Pattern
1. Check the ABL. If it is not within specifications,
use the ABL controls to adjust. 31 ± 1 ft-L
2. Select "@4: COLOR SAVE" to save the data.
3. Select "@6: ALL COLOR SAVE" to save CH2.
LB15VS/LB17LS/LB17KS/
LB17LT/LB17KT
4-3-2 (d) WHITE BALANCE ADJUSTMENT VERIFICATION
CONDITIONS
Scanning frequency:
Display image:
X-Y Coordinates:
ABL Luminance
Brightness:
Contrast:
FRONT BEZEL OPENING
BACK RASTER 1. Check whether the color coordinates of the back
WHITE WINDOW
2. Display a full white pattern.
3. Select "Geometry" in softjig menu.
4. Select "@7: 5-ft " in right menu.
5. Check whether the white coordinates of the video
6. Select "@8: 24-ft " in right menu.
7. Check whether the white coordinates of the video
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
4-3-3 Color Adjustments for sRGB
4-3-3 (a) BACK RASTER COLOR ADJUSTMENT
CONDITIONS
Scanning frequency:
Screen:
Bright:
Contraster:
1. Select COLOR CHANNEL 4 to control the color
2. Adjust the luminance of the back raster to between
3. Click on the << or >> boxes next to R_CUT and
4-3-4 (b) GAIN (WITHOUT ABL) ADJUSTMENT
4 Alignment and Adjustments
54 kHz/85 Hz : 15"
68 kHz/85 Hz : 17"
Back raster pattern
Full White Pattern
x = 0.283 ± 0.02,
y = 0.298 ± 0.02
Refer to 4-3-2(c)
Maximum
5 ft-L, 24 ft-L
raster satisfy the above spec.
If they do not, return to 4-3-2 (a) and readjust all
settings.
meet the above coordinates spec.
satisfies the above spec.
If they do not, return to 4-3-2 (a) and readjust all
settings.
Select "Color" and click "@2: CHANNEL 2" for
color ajdustment for 6500K
Repeat the sequence for 9300K adjustment.
luminance values are the same as 9300K, but the
color coordinats of back raster and white box are :
x = 0.313 ± 0.02 y = 0.329 ± 0.02
54 kHz/85 Hz : 15"
68 kHz/85 Hz : 17"
Back raster pattern
MAX
MAX
for sRGB.
0.5 to 0.7 ft-L using the G_CUT controls.
B_CUT to adjust the R-Bias to x = 0.312 ± 0.02
and the B-Bias to y = 0.329 ± 0.02.
4-5