Sharp LC-32LE350M, Service Manual, Page: 16 / 70

LC-32LE350M
6 – 4
B. WHITE BALANCE ADJUSTMENT
a) White Balance Adjustment
NO.
ITEM E R U D E C O R P N O I T I D N O C
1 Setting Backlight : MAX
AV Mode : DYNAMIC
Active Backlight : OFF
Set the luminance
meter on the centre
of the screen
For the details of white balance adjustment procedure, please refer to
white balance adjustment spec for Kameyama model.
1. Confirm the set condition.
2. Connect the white balance jig.
3. Through RS-232C command, adjustment mode screen is displayed.
2 Auto
Adjustment [command]
Adjustment Mode
KRSW0001
KKT10037
Setting
KYOF0001
OSDS0001
SBSL0016
Multi point adj. Mode
MSET0000
WBI20255
Point 2
WBI20229
MG2G****
MG2B****
MG2R****
Point 1
WBI10040
MG1G****
MG1B****
MG1R****
Write
MSET0003
Set Max.Level
MGMG****
MGMR****
MGMB****
[Adjustment Procedure]
1. Using the R/C, set the LCD TV to adjustment mode.
2. Measure max. brightness L
max
.
3. Calculate min. brightness L
min
= L
max
/ 5000.
4. Measure Point 2 brightness (L
high
)
5. Set the reference value R,G,B of Point 2 (R2) = 3664 x (229 / P2)
where P2 = 255 x [(L
high
– L
min
) / (L
max
– L
min
)]
1/2.2
6. Set the specified gradation for point 2, fix the most faint colour to get
reference value, adjust others 2 colour to minus adjustment for
reference value of point 2.
7. Measure Point 1 brightness (L
low
).
8. Set the reference value R,G,B of Point 1 (R1) = 640 x (40 / P1)
where P1 = 255 x [(L
low
– L
min
) / (L
max
– L
min
)]
1/2.2
9.Set the specified gradation for point 1. Set G of point 1 to the default
value [(R1 x G value of point 2 / R2), with fractions rounded] and adjust
RB to the reference value of point 1
10. Adjusted value is writing at [command] MSET0003.
11. Set the G of point Max. to the default value (4080 x G value of point 2 /
R2). Set the R,B Max. value [G
max
– G value of point 2 + (R,B value of
point 2)]
12. Calculate the slope R2
slope,
G2
slope,
B2
slope
between MAX and Point2.
R2
slope =
(R
max
- R
high
)/(4080-3664)
13.Calculate the correction value پ R
high,
پ G
high,
پ B
high.
پ
R
high =
R2
slope X
(3840-3664)
14.Set the reference value R,G,B of point 2 (R2
’
)=R2+ پ R
high
15. Calculate the slope R1
slope,
G1
slope,
B1
slope
between Point2 and Point1.
R1
slope =
(R
high
- R
low
)/(3664-640)