Sharp LC-32LE280X Service Manual

B. WHITE BALANCE ADJUSTMENT
a) White Balance Adjustment
NO
.
ITEM
CONDITION
PROCEDURE
i
Setting
Backlight : MAX
AV Mode : DYNAMIC
Active Backlight : OFF
SUPER ECO : 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.
ii
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
WBI10064
MG1G****
MG1B****
MG1R****
Write
Initial setting
Panel Contrast
R/G/B_MAX
R/G/B_HIGH
R/G/B_LOW
C
nt
= 3000:1 (CSOT Lite panel)
WB
MAX
= 4080
WBH
= 3664 /4080
WBL
= 1024 /4080
(1) Measurement MAX Brightness
(2) Set MIN Brightness
(3) Measurement HIGH Brightness
(4) Measurement LOW Brightness
(5) Calculation H γ
(6) Calculation Lγ
(7) Calculation HIGH luminance (γ=2.2)
(8) Calculation Initial setting of
R/G/B_HIGH
(9) Set Initial setting of
R/G/B_HIGH
(10) Original WB adjustment is performed (HIGH)
Set the specified gradation for point 2, fix the
most faint colour to get reference value,
adjust others 2 colours to minus adjustment
for reference value of point 2.
(11) Measurement HIGH Brightness
(Set) R_HIGH= G_HIGH
G_HIGH= G_HIGH
B_HIGH= G_HIGH
(12) Calculation MAX luminance after WB
ADJ set to γ=2.2 (LXHG)
(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.
Lmax=305.7 cd/m²
Lmin= Lmax/Cnt = 0.102
LXH=235.1 cd/m²
LXL=2.06 cd/m²
Hγ=LOG((LXH-Lmin)/(Lmax-Lmin))/LOG(WBH/WBMAX)= 2.44
Lγ =LOG((LXL-Lmin) /(Lmax-Lmin))/LOG(WBL/WBMAX)=2.73
LH22=(Lmax-Lmin) x (WBH/WBMAX)^2.2+Lmin=241.31
WBHX=WBMAX X ((LH22-Lmin)/(Lmax-Lmin))^(1/H γ)=3703
R_HIGH=WBHX’=3703
G_HIGH=WBHX’=3703
B_HIGH=WBHX’=3703
R_HIGH=3702
G_HIGH=3641
B_HIGH=3703
R_HIGH=3641
G_HIGH=3641 LXHG=231.3
B_HIGH=3641
LXMX=LXHG/((WBH/WBMAX)^2.2)=293.04
R_MAX=G_MAX*(R_HIGH/G_HIGH)=4078
G_MAX=WBMAX X ((LXMX-Lmin)/(Lmax-Lmin))^(1/Hγ)=4010
B_MAX=G_MAX*(B_HIGH/G_HIGH)=4078
LXLX=(LXMX-Lmin) x (WBL/WBMAX)^2.2+Lmin=5.08
WBLX=WBMAX X ((LXLX-Lmin)/(Lmax-Lmin))^(1/Lγ)=901
R_LOW=WBXLX=901
G_LOW=WBXLX=901
B_LOW=WBXLX=901
R_LOW= 921
G_LOW=901
B_LOW=971
RESULT
RESULT
Example for adjustment method
(be careful of INT setting)

Sharp LC-32LE280X Specifications

General

Brand	Sharp
Model	LC-32LE280X
Category	LED TV
Language	English