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4 Alignment and Adjustments
4-3-2 (d) ABL ADJUSTMENT
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
Figure 4-10. Full White Pattern
1. Check the ABL. If it is not within the
specifications, use the ABL controls to adjust
it. (29 ± 1 ft-L )
2. Select "@4: COLOR SAVE" to save the data.
3. Select "@6: ALL COLOR SAVE" to save the
CH2.
4-3-2 (e) WHITE BALANCE ADJUSTMENT VERIFICATION
CONDITIONS
Scanning frequency:
Display image:
X-Y Coordinates:
ABL Luminance
Brightness:
Contrast:
1. Check whether the color coordinates of the
back raster satisfy the above spec.
If they do not, return to 4-3-2 (a) and readjust
all settings.
2. Display a full white pattern.
3. Select "Geometry" in softjig menu.
4. Select "@7: 5-ft " in right menu.
4-6
68 kHz/85 Hz
Full white pattern
Maximum
Maximum
FRONT BEZEL OPENING
BACK RASTER
WHITE WINDOW
68 kHz/85 Hz
Back raster pattern
Full White Pattern
x = 0.283 ± 0.02,
y = 0.298 ± 0.02
Refer to 4-3-2(c)
Maximum
5 ft-L, 24 ft-L
5. Check whether the white coordinates of the
video meet the above coordinates spec.
6. Select "@8: 24-ft " in right menu.
7. Check whether the white coordinates of the
video satisfies the above spec.
If they do not, return to 4-3-2 (a) and readjust
all settings.
Select "Color" and click "@2: CHANNEL 2"
for color ajdustment for 6500K
Repeat the sequence of 9300K adjustment.
The luminance values the same as 9300K, but
the color coordinated of back raster and white
box are : x = 0.313 ± 0.02 y = 0.329 ± 0.02
4-3-3 Luminance Uniformity Check
Luminance is considered uniform only if the ratio
of lowest to highest brightness areas on the screen
is not less than 7.5:10.
CONDITIONS
Scanning frequency:
Display image:
Brightness:
Contrast:
68 kHz/85 Hz
(1024 x 768)
White flat field
Cut off point at 24 ft-L
Maximum
AP17K*/AP17J*
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