Samsung LB15VS Service Manual page 16

4 Alignment and Adjustments
4-2-7 Side Pincushion Adjustment
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15"
68 kHz/85 Hz : 17"
Display image: Crosshatch pattern
Use control bar after selecting "PINCUSHION" in left
menu to straighten the sides of the image area.
| C1 |, | C2 | ≤ 2.0 mm, | D1 |, | D2 | ≤ 2.0 mm.
C2
D1
C1
Figure 4-5. Pincushion
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:
Scanning frequency: 54 kHz/85 Hz : 15"
68 kHz/85 Hz : 17"
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,
4-4
D2
Color analyzer
y = 0.298 ± 0.02
y = 0.329 ± 0.02
4-2-8 Degauss
No adjustments are available for the degaussing
circuit. The degaussing circuit can effectively function
only once every 30 minutes.
4-2-9 To Delete the User Mode Data
To delete the adjustment data from the user modes,
click "@4: USER DELETE" in right menu.
4-2-10 Save the Data
To save the adjustment data for a mode, press "@3:
ALL MODE SAVE" in right menu.
4-3-2 Color Adjustments for 9300K
4-3-2 (a) BACK RASTER COLOR ADJUSTMENT
CONDITIONS
Scanning frequency: 54 kHz/85 Hz : 15"
68 kHz/85 Hz : 17"
Display image: Back raster pattern
Brightness: Maximum
Contrast: Maximum
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.
LB15VS/LB17LS/LB17KS/
LB17LT/LB17KT