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: 312 mm (H) x 234 mm (V).
1280 x 1024 mode (91 kHz/85Hz)
Adjust the horizontal position and vertical
position to
≤
4.0 mm of the center point of the
screen.
|A-B|
≤
4.0 mm. |C-D|
≤
4.0 mm.
Figure 4-3. Centering
4-2-1 (a) HORIZONTAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
91 kHz / 85 Hz
Display image:
Crosshatch pattern
Brightness:
Cut-off
Contrast:
Maximum
Click on the << or >> box next to
SIZE B+
to
adjust the horizontal size of the display pattern
to 312 mm (Tolerance: ± 3 mm) as the “H_SIZE”
is “62” on the OSD.
4-2-1 (b) VERTICAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
91 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
234 mm. (Tolerance: ± 3 mm.)
4-2-1 (c) HORIZONTAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency:
91 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.
4-2-1 (d) VERTICAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency:
91 kHz / 85 Hz
Display image:
Crosshatch pattern
Brightness:
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 Table 4-1 an
image appears distorted, elongated or squashed.
Horizontal Linearity = 2x x100
Vertical Linearity = 2x x100
Table 4-1
❈
Preset Mode : 91 KHz / 85 Hz
Pre-load Mode : Refer to Timing Chart
4-2-2 (a) HORIZONTAL LINEARITY ADJUSTMENT
CONDITIONS
Scanning frequency:
91 kHz / 85 Hz
Display image:
Crosshatch pattern
Brightness:
Cut-off
Contrast:
Maximum
To adjust the Horizontal Linearity, refer to Table
4-1 for the tolerance range.
Click on the << or >> box next to
H_LIN
to
optimize the image.
Table 4-2
(Horizontal x Vertical Size Table)
4 Alignment and Adjustments
4-2
CF21M*
4-2 Display Control Adjustments
C
A
DISPLAY AREA
EDGE OF BEZEL
B
D
Preset mode
≤
4%
≤
8%
Adjacent Linearity Entire Linearity
Pre-load mode (48kHz~)
≤
5%
≤
10%
Pre-load mode (under 48kHz)
≤
5%
≤
14%
X max-X min
X max+X min
Y max-Y min
Y max+Y min
21”
Horizantal
393
Vertical
294.5
Summary of Contents for CF21M
Page 7: ...CF21M 6 1 6 Exploded View and Parts List ...
Page 17: ...10 Schematic Diagrams 10 6 CF21M 1 368 V IC601 1 ...
Page 19: ...10 Schematic Diagrams 10 8 CF21M 19 IC103 5 24 15 CRT Socket Red Green Blue 20 R G B Video ...
Page 21: ...10 Schematic Diagrams 10 10 CF21M Memo ...
Page 22: ...Memo 9 Wiring Diagram 9 2 CF21M ...
Page 23: ...Memo 8 Block Diagrams 8 2 CF21M ...
Page 48: ...Memo 7 Electrical Parts List 7 26 CF21M ...
Page 49: ...7 Electrical Parts List CF21M 7 27 Loc No Code No Description Specification Remarks ...
