Samsung TT17J Series Service Manual page 13

4 Alignment and Adjustments
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 Table 4-1 , an
image appears distorted, elongated or squashed.
Horizontal Linearity = 2x
Y max-Y min
Vertical Linearity = 2x
Y max+Y min
Table 4-1
Adjacent Linearity
≤ 4%
Preset mode
≤ 5%
Pre-load mode
Preset Mode : 68KHz / 85Hz
Pre-load Mode : Refer to Timing Chart
4-4
68 kHz/85 Hz
Crosshatch pattern
68 kHz/85 Hz
Crosshatch pattern
X max-X min
x100
X max+X min
x100
Entire Linearity
≤ 10%
≤ 14%
4-2-5 (a) HORIZONTAL LINEARITY ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
To adjust the Horizontal Linearity, refer to Table
4-1 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 Table 4-1
for the tolerance range.
Use control bar after selecting "V-LINEARITY
BAL" in left menu to optimize the image.
4-2-6 Trapezoid Adjustment
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
Use control bar after selecting "TRAPEZOID" in
left menu to make the image area rectangular.
| A - B | < 4 mm
A
B
Figure 4-4. Trapezoid
68 kHz/85 Hz
Crosshatch pattern
Maximum
Maximum
68 kHz/85 Hz
Crosshatch pattern
Maximum
Maximum
68 kHz/85 Hz
Crosshatch pattern
Maximum
Maximum
A
B
TT17J*