Color Adjustments - Samsung DP15HS/HT 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 ÒColorÓ 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 ± 0.02,
6500K to x = 0.313 ± 0.02,
4-3-2 Color Adjustments for 9300K
4-3-2 (a) BACK RASTER COLOR ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
1. Select Ò@1: CHANNEL 1Ó 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 ÒGREEN CUTOFFÓ in the menu.
3. Use control bar after selecting ÒBLUE
CUTOFFÓ in left menu to set the ÒyÓ
coordinate to 0.298 ± 0.02.
4. Use control bar after selecting ÒRED
CUTOFFÓ in left menu to 0.283 ± 0.02.
* If color values would not be matched desirable
values, repeat sequence 3 and 4 after readjusting
ÒGREEN CUTOFFÓ control a little different.
4-6
68 kHz/85 Hz (17Ó)
54 kHz/85 Hz (15Ó)
White flat field at
center of display area
Maximum
y = 0.298 ± 0.02
y = 0.329 ± 0.02
68 kHz/85 Hz (17Ó)
54 kHz/85 Hz (15Ó)
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 ÒRED GAINÓ,
ÒGREEN GAINÓ and ÒBLUE GAINÓ to adjust
the luminance to 45 ft-L (15Ó) and 46 ft-L
(17Ó) with the color coordinates ranged for
9300K to x = 0.283 ± 0.02, y = 0.298 ± 0.02.
exception) 17Ó SDD CRT type-named
(*/S-2) : 42ft-L.
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. (15Ó: 33 ± 1 ft-L, 17Ó: 36 ± 1 ft-L )
2. Select Ò@4: COLOR SAVEÓ to save the data.
3. Select Ò@6: ALL COLOR SAVEÓ to save the
CH2.
68 kHz/85 Hz (17Ó)
54 kHz/85 Hz (15Ó)
White box pattern
0.06ft-L at Back Raster
Pattern Display
Maximum
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
68 kHz/85 Hz (17Ó)
54 kHz/85 Hz (15Ó)
Full white pattern
Maximum
Maximum
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
DP15H*/DP17L*