LG Flatron F700P, Руководство по обслуживанию

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11-2. Adjustment of White Balance
After finishing adjustment of cut off (back raster),
approve "Color(15.0) Full white pattern".
Adjust to BDRV Data = 85.
Adjust RDRV and GDRV to set chromaticity diagram at :
x: 0.283
0.003
y: 0.298 0.003
Approve "Window pattern (70x70mm)" to adjust
S-CON to Y : 47
1FL.
Approve "Color (15.0) Full white pattern" again and
adjust ABL Data to Y : 32
1FL
Adjust the horizontal position and vertical position to
4.0 mm of the center point of the screen.
* SIZE adjustment should be made in ALL Mode.
12. Focus Adjustment
CONDITIONS
Scanning frequency : 91KHz/85KHz(mode 4)
Display image:
“H” character pattern
Brightness: Cut off point
Contrast: Maximum
PROCEDURE
1. Adjust the Focus VR on the FBT to display the
sharpest image possible.
2. Use Locktite to seal the Focus VR in position.
14. Color Purity Adjustment(domestic_china)
Color purity is the absence of undesired color.
Conspicuous mislanding (unexpected color in a uniform
field) within the display area shall not be visible at a
distance of 50 cm from the CRT surface.
CONDITIONS
Orientation: Monitor facing east
Scanning Frequency:
1280 x 1024@85Hz(91kHz/85Hz)
Display image: White flat field
Luminance: Cut off point at the center of the
display area
Note : Color purity adjustments should only be
attempted by qualified personnel.
PROCEDURE
For trained and experienced service technicians only.
Use the following procedure to correct minor color
purity problems:
1. Make sure the display is not affected by external
magnetic fields.
2. Very carefully break the glue seal between the 2-pole
purity convergence magnets (PCM), the band and
the spacer.
3. Make sure the spacing between the PCM assembly
and the CRT stem is 29 mm 1 mm.
4. Display a green pattern over the entire display area.
5. Adjust the purity magnet rings on the PCM assembly
to display a pure green pattern.
(Optimum setting: x = 0.295 0.015,
y = 0.594 0.015)
6. Repeat steps 4 and 5 using a red pattern and then
again, using a blue pattern.
Table 4-6. Color Purity Tolerances
(For 9300K color adjustment: x = 0.283 0.02,
y = 0.298 0.02)
7. When you have the PCMs properly adjusted,
carefully glue them together to prevent their
movement during shipping.
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U
DISPLAY AREA
EDGE OF BEZEL
D
L R
|L-R| 4.0 mm. |U-D| 4.0 mm.
Red: x=0.620 0.015 y=0.334 0.015
Green: x=0.620 0.015 y=0.334 0.015
Blue: x=0.620 0.015 y=0.334 0.015