Color Adjustments - Samsung 955MB Service Manual

4 Alignment and Adjustments

4-3 Color Adjustments

CAUTION: Check below condition before color
adjustment Video signal : Analog 0.7
Vp-p (at 75 Ω)
Sync : TTL level (H, V seperate signal)
* Select "Color" in Softjig menu for color adjustment.
4-3-1 Color Coordinates (Temperature)
Color temperature is a measurement of the
radiant energy transmitted by a color. For
computer monitors, the color temperature refers
to the radiant energy transmitted by white. Color
coordinates are the X and Y coordinates on the
chromaticity diagram of wavelengths for the
visible spectrum.
CONDITIONS
Measurement instrument: Color analyzer
Scanning frequency: 68 KHz/85 Hz
Display image: White flat field at
center of display area
Luminance: Maximum
PROCEDURE
Use the directions in sections 4-3-2 through 4-3-3
to adjust the color coordinates for:
9300K to x = 0.283 ± 0.02,
6500K to x = 0.313 ± 0.02,
4-3-2 Color Adjustments
4-3-2 (a) BACK RASTER COLOR ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
1. Select "@1: CHANNEL 1" in right menu to
control the color for 9300K.
2. Adjust the luminance of the back raster to
between 0.5 to 0.7 ft-L using control bar after
selecting "GREEN CUTOFF" in the menu.
3. Use control bar after selecting "BLUE
CUTOFF" in left menu to set the "y"
coordinate to 0.298 ± 0.02
4. Use control bar after selecting "RED
CUTOFF" in left menu to 0.283 ± 0.02
* If color values can not be matched to desirable
values, repeat sequences 3 and 4 after
readjusting "GREEN CUTOFF" control.
CA19JS
y = 0.298 ± 0.02
y = 0.329 ± 0.02
68 KHz/85 Hz
Back raster pattern
Maximum
Maximum
4-3-2 (b) WHITE BALANCE ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
1/3H-1/2H
1/3V-1/2V
Figure 4-8. White Box Pattern
1. Use control bar after selecting "RED GAIN",
"GREEN GAIN" and "BLUE GAIN" to adjust
the luminance to 36ft-L with the color
coordinates ranged for
9300K to x = 0.283 ± 0.02, y = 0.298 ± 0.02.
4-3-2 (c) HIGH LIGHT ZONE ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
1/3H-1/2H
1/3V-1/2V
Figure 4-9. High Light Box Pattern
1. Select "@9: BMFULL" in right menu.
2. Use control bar after selection "BM CONT" to
adjust the luminance to
65ft -L (± 5 ft-L)
3. Select "@0: BM OFF" in right menu.
CONFIDENTIAL
68 KHz/85 Hz
White box pattern
0.06 ft-L at Back Raster
Pattern Display
Maximum
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
68 KHz/85 Hz
White box pattern
0.06ft-L at Back Raster
Pattern Display
Maximum
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
4-5