Display Control Adjustments - Samsung CHB5707L/5237L Service Manual

6-2 Display Control Adjustments

6-2-1 Centering
Centering means to position the center point of
the display in the middle of the display area.
Horizontal size and position and vertical size and
position control the centering of the display.
Adjust the horizontal size and vertical size to their
optimal settings: 306 mm (H) x 230 mm (V) for
17Ó, 290 mm (H) x 217.5 mm (V) for 16Ó,
267 mm (H) x 200 mm (V) for 15Ó.
Adjust the horizontal position and vertical
position to ² 4.0 mm of the center point of the
screen.
|A-B| ² 4.0 mm.
C
A
D
Figure 6-3. Centering
6-2-1 (a) HORIZONTAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
Click on the << or >> box next to B+OUT to
adjust the horizontal size of the display pattern to
306 mm (17Ó), 290 mm (16Ó) and 267 mm (15Ó).
(Tolerance: ± 3 mm.)
6-2-1 (b) VERTICAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
Click on the << or >> box next to V_SIZE to
adjust the vertical size of the display pattern to
230 mm (17Ó), 217.5 mm (16Ó) and 200 mm (15Ó).
(Tolerance: ± 3 mm.)
CHB5**7L/6**7L/7**7L
|C-D| ² 4.0 mm.
DISPLAY AREA
B
EDGE OF BEZEL
68 kHz/85 Hz (17Ó/16Ó)
54 kHz/85 Hz (15Ó)
Crosshatch pattern
Maximum
Maximum
68 kHz/85 Hz (17Ó/16Ó)
54 kHz/85 Hz (15Ó)
Crosshatch pattern
Maximum
Maximum
6-2-1 (c) HORIZONTAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Click on the << or >> box next to H_POSI to
center the horizontal image on the raster.
6-3-1 (d) VERTICAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Click on the << or >> box next to V_POSI to
center the vertical image on the raster.
6-2-2 Linearity
Linearity affects the symmetry of images as they
appear on the screen. Unless each row or column
of blocks in a crosshatch pattern is of equal size,
or within the tolerances shown in Tables 6-2 and
6-3, an image appears distorted, elongated or
squashed.
Table 6-1. Standard Modes Linearity: 640x480/75Hz,
800x600/85Hz and 1024x768/85Hz
Each block (10 %)
Horizontal: 18.2~20.1
4 : 3
Vertical : 18.2~20.1
Horizontal: 17.1~18.9
5 : 4
Vertical : 18.2~20.1
Table 6-2. Other Modes Linearity: VGA, SVGA, XGA,
MAC, etc.
Each block (10 %)
Horizontal: 17.8~20.5
4 : 3
Vertical : 17.8~20.5
Horizontal: 16.7~19.2
5 : 4
Vertical : 17.8~20.5
6 Alignment and Adjustments
68 kHz/85 Hz (17Ó/16Ó)
54 kHz/85 Hz (15Ó)
Crosshatch pattern
68 kHz/85 Hz (17Ó/16Ó)
54 kHz/85 Hz (15Ó)
Crosshatch pattern
Standard Modes Linearity
Difference between
adjacent blocks (4 %)
Horizontal: Less than 0.77 mm
Vertical : Less than 0.77 mm
Horizontal: Less than 0.72 mm
Vertical : Less than 0.77 mm
Supported Timing Mode
Difference between
adjacent blocks (5 %)
Horizontal: Less than 0.96 mm
Vertical : Less than 0.96 mm
Horizontal: Less than 0.90 mm
Vertical : Less than 0.96 mm
6-3