Color Adjustments - Samsung 551V 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 )
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:
Display image:
Luminance:
PROCEDURE
Use the directions in sections 4-3-2 through 4-3-3
to adjust the color coordinates for:
9300K to x = 0.283 ± 0.015,
6500K to x = 0.313 ± 0.015,
4-3-2 Color Adjustments for 9300K
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 contron 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 ± 0.015
4. Use control bar after selecting "RED
CUTOFF" in left menu to 0.283 ± 0.015
* If color values would not be matched desirable
values, repeat sequence 3 and 4 after readjusting
"GREEN CUTOFF" control a little different.
4-4
54 KHz/85 Hz
White flat field at
center of display area
Maximum
y = 0.298 ± 0.015
y = 0.329 ± 0.015
54 KHz/85 Hz
Back raster pattern
Maximum
Maximum
4-3-2 (b) WHITE BALANCE ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
1. Use control bar after selecting "RED GAIN",
"GREEN GAIN" and "BLUE GAIN" to adjust
the luminance to 50 ft-L with the color
coordinates ranged for
9300K to x = 0.283 ± 0.015, y = 0.298 ± 0.015.
1/3H-1/2H
1/3V-1/2V
Figure 4-8. White Box Pattern
4-3-2 (c) ABL ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
Figure 4-9. Full White Pattern
1. Check the ABL. If it is not within the
specifications, use the ABL controls to adjust
it. (38 ± 1 ft-L )
2. Select "@4: COLOR SAVE" to save the data.
3. Select "@6: ALL COLOR SAVE" to save the
CH2.
4-3-2 (d) WHITE BALANCE ADJUSTMENT VERIFICATION
CONDITIONS
Scanning frequency:
CONFIDENTIAL
54 KHz/85 Hz
White box pattern
0.06ft-L at Back Raster
Pattern Display
Maximum
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
54 KHz/85 Hz
Full white pattern
Maximum
Maximum
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
54 KHz/85 Hz
AN15V*