Sylvania LC420SS8, Руководство по обслуживанию

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5-2 A81H1EA
1. Purity Check Mode
This mode cycles through full-screen displays of red,
green, blue, and white to check for non-active pixels.
1. Enter the Service mode.
2. Each time pressing [7] button on the service
remote control unit, the display changes as
follows.
The following adjustment normally are not attempted in
the field. Only when replacing the LCD Panel then adjust
as a preparation.
2. White Balance Adjustment
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
1. Operate the unit for more than 20 minutes.
2. Input the White Purity.
3. Set the color analyzer to the CHROMA mode and
bring the optical receptor to the center on the
LCD-Panel surface after zero point calibration as
shown above.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOL.
n
] button on
the service remote control unit and select “C/D”
mode.
[7] button
Note:
When entering this mode, the default setting is White mode.
Purity Check Mode
[7] button
Red mode
Green mode
Blue mode
White mode
[7] button
[7] button
Test Point Adj. Point Mode Input
Screen
[CH.
o
/
p
]
buttons
[VIDEO1]
C/D
White Purity
(APL 70%)
or
(APL 25%)
M. EQ. Spec.
Pattern Generator,
Color analyzer
x= 0.272 ± 0.005
y= 0.278 ± 0.005
Figure
Color Analyzer
It carries out in a darkroom.
L = 3 cm
Perpendicularity
INPUT: WHITE 70%, 25%
25%=25IRE 70%=70IRE
INPUT SIGNAL