Samsung TP17LT Service Manual page 14

4 Alignment and Adjustments
4-2-4 (b) VERTICAL SIZE ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
Use control bar after selecting "V-SIZE" in left
menu to adjust the vertical size of the display
pattern to 230 mm. (Tolerance: ± 4 mm.)
4-2-4 (c) HORIZONTAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Use control bar after selecting "H-POSITION" in
left menu to center the horizontal image on the
raster.
4-2-4 (d) VERTICAL POSITION ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Use control bar after selecting "V-POSITION" in
left menu to center the vertical image on the
raster.
4-2-5 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 4-2 and
4-3, an image appears distorted, elongated or
squashed.
Table 4-2. 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
4-4
68 kHz/85 Hz
Crosshatch pattern
Maximum
Maximum
68 kHz/85 Hz
Crosshatch pattern
68 kHz/85 Hz
Crosshatch pattern
Standard Modes Linearity
Difference between
adjacent blocks (4 %)
Horizontal: Less than 0.77 mm
Vertical : Less than 0.77 mm
Table 4-3. Other Modes Linearity: VGA, SVGA, XGA,
MAC, etc.
Each block (14 %)
Horizontal: 17.8~20.5
4 : 3
Vertical : 17.8~20.5
4-2-5 (a) HORIZONTAL LINEARITY ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
To adjust the Horizontal Linearity, refer to Tables
4-2 and 4-3 for the tolerance range.
Increase or decrease H_LIN to optimize the
image.
4-2-5 (b) VERTICAL LINEARITY ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
To adjust the Vertical Linearity, refer to Tables 4-2
and 4-3 for the tolerance range.
Use control bar after selecting "V-LINEARITY
BAL" in left menu to optimize the image.
Supported Timing Mode
Difference between
adjacent blocks (5 %)
Horizontal: Less than 0.96 mm
Vertical : Less than 0.96 mm
68 kHz/85 Hz
Crosshatch pattern
Maximum
Maximum
68 kHz/85 Hz
Crosshatch pattern
Maximum
Maximum
TP17LT