Read Sharp LL-T181A (serv.man3) Service Manual online
3. Adjustment items
3-1. [Menu 1] ADJUSTMENT
Adjust the position and size of the screen according to the video
signal from the computer.
signal from the computer.
MANUAL: Select this option when you want to adjust manually.
AUTO:
[CLOCK], [PHASE], [H-POS], and [V-POS] are auto-
matically adjusted.
matically adjusted.
CLOCK
Use the or button to adjust the CLOCK so that you cannot see
vertical stripes-like noses in the pattern where white and black lines
alternate.
vertical stripes-like noses in the pattern where white and black lines
alternate.
PHASE
Use the or button to adjust the PHASE so that you can see a
clear white and black pattern on the screen with the horizontal stripes-
like noises minimized.
clear white and black pattern on the screen with the horizontal stripes-
like noises minimized.
H-POSITION
The screen moves to the right by pressing the button and to the left
by pressing the button. Adjust the H-POSITION so that you can see
both the frame lines at the right and left edges of the adjustment
pattern.
by pressing the button. Adjust the H-POSITION so that you can see
both the frame lines at the right and left edges of the adjustment
pattern.
V-POSITION
The screen moves upward by pressing the button and downward by
pressing the button. Adjust the V-POSITION so that you can see
both the frame lines at the top and bottom edges of the adjustment
pattern.
pressing the button. Adjust the V-POSITION so that you can see
both the frame lines at the top and bottom edges of the adjustment
pattern.
3-2. [Menu 2] GAIN CONTROL
Select this option to adjust the brightness and contrast of the screen.
The brightness and contrast of the screen are factory set for optimal
conditions.
However, the adjustment of brightness and contrast may be required
depending on the type of the computer connected. If such adjust-
ments are required, use the color pattern in the adjustment program.
conditions.
However, the adjustment of brightness and contrast may be required
depending on the type of the computer connected. If such adjust-
ments are required, use the color pattern in the adjustment program.
MANUAL: Select this option when you want to adjust manually.
AUTO:
When AUTO is selected by using the button, the
auto gain control function works to adjust the bright-
ness and contrast of the screen to the optimal condi-
tions. During the progress of the adjustment, the
screen looks dark, showing [ADJUSTING] onscreen.
auto gain control function works to adjust the bright-
ness and contrast of the screen to the optimal condi-
tions. During the progress of the adjustment, the
screen looks dark, showing [ADJUSTING] onscreen.
The auto gain control function adjusts the brightness and contrast
of the screen, using the brightest color of the image onscreen as a
reference. If you use this function without displaying the adjust-
ment pattern, a white color area of at least 5 mm x 5 mm is
required onscreen; otherwise, this function may not work. In such a
case, [OUT OF ADJUST] appears on the screen and the settings
remain unchanged.
of the screen, using the brightest color of the image onscreen as a
reference. If you use this function without displaying the adjust-
ment pattern, a white color area of at least 5 mm x 5 mm is
required onscreen; otherwise, this function may not work. In such a
case, [OUT OF ADJUST] appears on the screen and the settings
remain unchanged.
BRIGHT
Adjust the brightness of the entire screen using this option.
Press the button to brighten and the button to darken.
You can also adjust the brightness of the backlight, the light source
of the LCD. Refer to the paragraph of the backlight adjustment.
of the LCD. Refer to the paragraph of the backlight adjustment.
CONTRAST
Use the color pattern of the adjustment program so that all tones can
be displayed onscreen. Press button to make it stronger and the
button to make weaker.
be displayed onscreen. Press button to make it stronger and the
button to make weaker.
3-3. [Menu 3] WHITE BALANCE
Select this option to adjust the color tone of the screen.
The color tone is factory adjusted for the optimal condition and thus
there is no need to make this adjustment. However, you can adjust it
according to your preference.
there is no need to make this adjustment. However, you can adjust it
according to your preference.
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