Sharp 4T-C60AH1X, Service Manual

Page: 10 / 56

4T-C6070AH1X
5 – 3
Point 1
WBI100 40
MG1G****
MG1B****
MG1R****
Write
MSET0003
Set
Max.Level
MGMG****
MGMR****
MGMB****
(12) Calculation MAX luminance after WB
ADJ set to γ=2.2 (L XHG
)
(13) Set R/G/B_MAX
(14) Calculation LOW luminance (
γ=2.2)
(15) Calculation Initial setting of
R/G/B_LOW
(16) Set Initial setting of R/G/B_LOW
(17) Original WB adjustment is performed (LOW).
Adjust RB to the reference value of point 1.
(18) Adjusted value is writing at [command]
MSET0003
(19) Calculate the slope R2
slope,
G2
slope,
B2
slope
between MAX and Point2.
R2
slope =
(R
max
- R
high
)/(4080- 3664 )
(20) Calculate the correction value
⊿
R
high,
⊿
G
high,
⊿
B
high.
⊿
R
high =
R2
slope X
( 3840-3664 )
(21)
Set the reference value R,G,B of point 2
(R2
ʼ )=R2+ ⊿ R
high
(22)
Calculate the slope R1
slope,
G1
slope,
B1
slope
between Point2 and Point1.
R1
slope =
(R
high
- R
low
)/( 3664-640 )
(23) Calculate the correction value
⊿
R
low,
⊿
G
low,
⊿
B
low.
⊿
R
low =
R1
slope X
( 717-640 )
(24)
Set the reference value R,G,B of point 1
(R1
ʼ )=R1+ ⊿ R
low
(25) Shut down the AC power.
※ Initial value at RGB 2 point : 3664
※ Initial value at RGB 1 point : 640
[Adjustment value]
☆ Teaching set send by engineering dept is set as
reference.
[Reference values for adjustment reference]
Equipment : Luminance meter [Minolta CS-2000]
Level
Spec
Data
Adj. Spec.
Inspection
Spec.
Point
2 ref.
values
229
x=
0.2670
y=
0.2690
0.0010 0.0020
Point
1 ref.
values
40
x=
0.2670
y=
0.2690
0.0045 0.0090
Ref. : For
Adjustment , set the LCD TV as below.
AV MODE : [DYNAMIC] (Reset)
Aging Time : Minimum 30 minutes
R_MAX=G_MAX*(R_HIGH/G_HIGH)=4078
G_MAX=WB
MAX
X ((L
XMX
-L
min
)/(L
max
-L
min
))^(1/H γ )=4010
B_MAX=G_MAX*(B_HIGH/G_HIGH)=4078
L
XLX
=(L
XMX
-L min ) x (WB
L
/WB
MAX
)^2.2+L min =5.08
WB
LX
=WB
MAX
X ((L
XLX
-L
min
)/(L
max
-L
min
))^(1/L
γ
)=901
R_LOW=WB
XLX
=901
G_LOW=WB
XLX
=901
B_LOW=WB
XLX
=901
R_LOW= 921
G_LOW=901
B_LOW=971
RESULT