Service manual
15
LC-20B8U-S
LC-20B9U-S
LC-20B9U-SM
Reference
(Onscreen display of adjustment process menu page 2)
5-4. White balance adjustment
1) Adjustment procedure (Call the AV input mode with INPUT3 or INPUT4.)
Adjust the RGB CUTOFF2 setting for the 40% white level, and the RGB-GAIN setting for the white 80% level.
(1) Adjustment
[Input signal] White 80% (191 gradations) and white 40% (92 gradations) signals
[Adjustment value] RGB CUTOFF2 and RGB-GAIN settings on adjustment process page 3
Adjustment spec. Inspection spec.
White 80% x=0.291 ±0.006 ±0.012 Radius from center point
y=0.300 ±0.006 ±0.012 Radius from center point
(Reference brightness: 300 cd/m
2
)
White 40% x=0.276 ±0.006 ±0.012 Radius from center point
y=0.282 ±0.006 ±0.012 Radius from center point
(Reference brightness: 50 cd/m
2
)
Cut-off (RGB CUTOFF2)
: Fix the G setting at 0. Vary the R and B settings. Adjustable range ±30.
Gain (RGB-GAIN): Reduce the settings of the two stronger colors. Adjustable range 0 to -70.
(The values are based on the Minolta CA-210.)
[6] Factory settings
6-1. Hold down the "INPUT" and "VOL (–)" keys on the set at once, and turn on the power. Hold down the "CH (ù)"
and "VOL (+)" keys at once. ("SETTING COMPLETE" appears on the screen.)
*Note: Immediately after the factory settings have been made, turn off the power switch.
(The next time the power is turned on, the set gets started in the EZ SETUP mode. An extra key-in just after
the factory setting may cause the set to malfunction.)
0
2
12
C
T
Y
T
N
P
P
3
O
A
D
A
T
A
A
4
M
M
A
M
S
L
L
5
P
T
P
C
-
-
6
B
A
M
N
7
I
L
H
T
8
A
A
T
T
9
S
M
A
A
10
P
M
M
11
P
P
12 13 14 15 16 17 18 19 20 21
4
1
1
1
22
5
5
5
5
8
9
9
23
0
5
7
8
5
1
1
24 25 26
0
1
2
3
4
5
6
7
8
Y Data
(White 75%)
|
SETTING COMPLETE