Sharp LC-90Y8T, Service Manual

Page: 30 / 67

LC-90Y8T
5 – 13
Point 6
LEV60 232
GCC6****
MG6G****
MG6B****
MG6R****
Point 5
LEV50 201
GCC5****
MG5G****
MG5B****
MG5R****
Point 4
LEV40 150
GCC4****
MG4G****
MG4B****
MG4R****
Point 3
LEV30 112
GCC3****
MG3G****
MG3B****
MG3R****
Point 2
LEV20 074
GCC2****
MG2G****
MG2B****
MG2R****
Point 1
LEV10 041
GCC1****
MG1G****
MG1B****
MG1R****
W/B adj. value data
input
MSET0003
(i) Y
WB6-SR3
䍻 248 cd/m 2 : Proceed to next step #5.
(ii) Y
WB6-SR3
< 248 cd/m 2 :
a) B6 䍴 928 : Proceed to next step #5.
b) B6 = 928 :
The parameter GAIN
G6
is calculated from equation (a).
GAIN
G6
= ( 258 / Y
WB6-SR3
) 1/ 2 ---- (a)
Maximum value of GAIN
G6
is 1.05. If GAIN
䍻
1.05 , set
GAIN
G6
to 1.05 . G6/R6 is corrected by equation (b)/(c),
and the value after correcting is G6’/R6’.
G6' = GAIN
G6
㽢 G6 (If G6’ > 928 , G6’= 928 ) ---- (b)
R6’ = R6
㽢
(G6’/G6) (If R6’ > 928 , R6’= 928 ) ---- (c)
R/G adjustment value of point6 is changed to R6’/G6’.
Proceed to next step #5.
5. Set the specified level for point 5, and measure the luminance.
Set the MID5 point of the gamma adjustment to 10 times of
the measured luminance (cd/m 2 ). Set the revised value of G
(804 * G level of point 6 / 928) (a fraction is rounded off.),
and adjust the value of R/B to “target value” of point 5.
6. Set the specified level for point 4, and measure the luminance.
Set the MID4 point of the gamma adjustment to 10 times of
the measured luminance e (cd/m
2 ). Set the revised value of G
(600 * G level of point 6 / 928) (a fraction is rounded off),
and adjust the value of R/B to “target value” of point 4.
7. Set the specified level for point 3, and measure the luminance.
Set the MID3 point of the gamma adjustment to 10 times of
the measured luminance (cd/m 2 ). Set the revised value of G
(448 * G level of point 6 / 928) (a fraction is rounded off),
and adjust the value of R/B for “target value” of point 3.
8. Set the specified level for point 2, and measure the luminance.
Set the MID2 point of the gamma adjustment to 10 times of
the measured luminance (cd/m 2 ). Set the revision value of G
(296 * G level of point 6 / 928) (a fraction is rounded off),
and adjust the value of R/B to “target value” of point 2.
9. Set the specified level for point 1, and measure the luminance.
Set the MID1 point of the gamma adjustment to 10 times of
the measured luminance (cd/m 2 ). Set the revised value of G
(164 * G level of point 6 / 928) (a fraction is rounded off),
and adjust the value of R/B to ”target value” of point 1.
10. Write the value of W/B adjustment by inputting command
“MSET0003”.
11. Set the specified level (=0) for point MIN, and measure
minimum luminance. Set the MIN point of the gamma
adjustment to 100 times of the measured luminance (cd/m
2 ).