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: 267 mm (H) x 200 mm (V) for
15Ó, 255 mm (H) x 191 mm (V) for 14Ó
Adjust the horizontal position and vertical
position to within 4.0 mm of the center point of
the screen.
l A - B l ² 5.0 mm.
l C - D l ² 5.0 mm.
6-2-1 (a) HORIZONTAL MINIMUM SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
Crosshatch pattern
Brightness:
Maximum
Contrast:
Maximum
PROCEDURE
Horizontal minimum size can be adjusted as
follows using Softjig.
1. Display the timing 800 x 600/85 Hz (15Ó),
640 x 480/85 Hz (14Ó).
2. Adjust horizontal size to minimum size using
H_SIZE.
3. Adjust horizontal minimum size to 250 mm
(15Ó) or 242 mm (14Ó) using H_SIZE MIN.
4. Adjust horizontal size to 267 mm (15Ó) or
255 mm (14Ó) using H_SIZE.
5. Press the ALL MODE SAVE horizontal
minimum size for each timing is saved
automatically.
If horizontal minimum size range cannot meet the
spec, horiontal maximum size of 640 x 480/75 Hz
including 800 x 600/60 Hz, 56 Hz, may be
saturated or cannot overscan the bezel.
6-2-1 (b) VERTICAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
Crosshatch pattern
Brightness:
Maximum
Contrast:
Maximum
A
djust the vertical size of the display pattern to
200 mm (15Ó) and 191 mm (14Ó).
(Tolerance: ± 3 mm.)
6-2-1 (c) HORIZONTAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
Crosshatch pattern
PROCEDURE
Center the test pattern on the raster.
6-2-1 (d) VERTICAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency:
53.7 kHz/85 Hz (15Ó)
43.3 kHz/85 Hz (14Ó)
Display image:
Crosshatch pattern
C
enter the test pattern 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 6-1 and
6-2, an image appears distorted, elongated or
squashed.
The formular of linearity (%)
Table 6-1. Standard Modes Linearity: 800 x 600/85Hz - 15”
640 x 480/85 Hz - 14”
Table 6-2. Other Modes Linearity: VGA, SVGA, XGA,
MAC, etc.
6 Alignment and Adjustments
CHA42*7L/5**7L
6-3
6-2 Display Control Adjustments
C
A
DISPLAY AREA
EDGE OF BEZEL
B
D
Figure 6-3. Centering
Supported Timing Mode
Each block (14 %)
Difference between
adjacent blocks (5 %)
Standard Timing Modes
Each block (10 %)
Difference between
adjacent blocks (4 %)
2 x (Max – Min)
=
x 100
Max + Min
Summary of Contents for CHA4217L
Page 2: ...Samsung Electronics Co Ltd August 1998 Printed in Korea Code No BH68 61127A ...
Page 10: ...Memo 3 Product Specifications 3 4 CHA42 7L 5 7L ...
Page 14: ...5 Disassembly and Reassembly 5 2 CHA42 7L 5 7L Memo ...
Page 62: ...9 Electrical Parts List 9 14 CHA42 7L 5 7L Memo ...
