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4 Alignment and Adjustments
4-2 Display Control Adjustments
4-2-1 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: 352 mm (H) x 264 mm (V) - 19�, 306 mm (H) x 230 mm (V) - 17�. 1024 x 768 mode (68 kHz/85Hz) 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 DISPLAY AREA A D B EDGE OF BEZEL
4-2-1 (d) VERTICAL POSITION ADJUSTMENT CONDITIONS Scanning frequency: Display image: Brightness: 68 kHz/85 Hz Crosshatch pattern Cut-off
Contrast: Maximum Click on the << or >> box next to V_POSI to center the vertical image on the raster.
4-2-2 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 4-1 and 4-2, an image appears distorted, elongated or squashed. Table 4-1. Factory Preset Modes Linearity
Standard Modes Linearity Each block (10 %) 4 : 3 (19�) 4 : 3 (17�) 5 : 4 (19�) Difference between adjacent blocks (4 %)
|C-D| ² 4.0 mm.
Figure 4-3. Centering 4-2-1 (a) HORIZONTAL SIZE ADJUSTMENT CONDITIONS Scanning frequency: Display image: Brightness: Contrast: 68 kHz/85 Hz Crosshatch pattern Cut-off Maximum
Horizontal: 20.9~23.1 Horizontal: Less than 0.88 mm Vertical : 20.9~23.1 Vertical : Less than 0.88 mm Horizontal: 18.2~20.1 Horizontal: Less than 0.77 mm Vertical : 18.2~20.1 Vertical : Less than 0.77 mm Horizontal: 19.60~21.65 Horizontal: Less than 0.82 mm Vertical : 20.9~23.1 Vertical : Less than 0.88 mm
Click on the << or >> box next to H_SIZE to adjust the horizontal size of the display pattern to 352 mm (19�), 306 mm (17�). (Tolerance: ± 3 mm.) 4-2-1 (b) VERTICAL SIZE ADJUSTMENT CONDITIONS Scanning frequency: 68 kHz/85 Hz Display image: Crosshatch pattern Brightness: Cut-off Contrast: Maximum Click on the << or >> box next to V_SIZE to adjust the vertical size of the display pattern to 264 mm (19�), 230 mm (17�). (Tolerance: ± 3 mm.) 4-2-1 (c) HORIZONTAL POSITION ADJUSTMENT CONDITIONS Scanning frequency: 68 kHz/85 Hz Display image: Crosshatch pattern Brightness: Cut-off Contrast: Maximum Click on the << or >> box next to H_POSI to center the horizontal image on the raster. CSE78**T/CSE98**T
Table 4-2. Other Modes Linearity: VGA, SVGA, XGA, MAC, etc.
Supported Timing Mode Each block (14 %) 4 : 3 (19�) 4 : 3 (17�) 5 : 4 (19�) Horizontal: 20.5~23.5 Vertical : 20.5~23.5 Horizontal: 17.8~20.5 Vertical : 17.8~20.5 Horizontal: 19.18~22.07 Vertical : 20.5~23.5 Difference between adjacent blocks (5 %) Horizontal: Less than 1.10 mm Vertical : Less than 1.10 mm Horizontal: Less than 0.96 mm Vertical : Less than 0.96 mm Horizontal: Less than 1.03 mm Vertical : Less than 1.10 mm
4-2-2 (a) HORIZONTAL LINEARITY ADJUSTMENT CONDITIONS Scanning frequency: Display image: Brightness: Contrast: 68 kHz/85 Hz Crosshatch pattern Cut-off Maximum
To adjust the Horizontal Linearity, refer to Tables 4-1 and 4-2 for the tolerance range. Click on the << or >> box next to H_LIN to optimize the image.
4-3
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