Sharp LC-32LE345T Service Manual page 17

5.2. White balance adjustment
Adjustment item Adjustment conditions
1 Adjustment Brightness : MAX
AV Mode : DYNAMIC
Active Backlight : OFF
Set the luminance meter on
the center of the screen
2 Auto Adjustment [command]
performance Adjustment Mode
KRSW0001
KKT10037
FACT0001
Setting
KYOF0001
OSDS0001
SBSL0016
Multi point adj. Mode
MSET0000
WBI20255
Point 2
WBI20127
MG2G****
MG2B****
MG2R****
Point 1
WBI10040
MG1G****
MG1B****
MG1R****
Write
MSET0003
Set Max.Level
MGMG****
MGMB****
MGMR****
Adjustment procedure
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.
[Adjustment Procedure]
1) Using the remote control, set the LCD TV to adjustment mode.
2) Measure Max brightness (Lmax).
3) Calculate min. brightness (Lmin)=Lmax/3000.
4) Measure Point 2 brightness (Lhigh).
5) Set the reference value R,G,B of Point 2 (Ref 2)=2032 x ( 127/P2)
where P2=255 x [(Lhigh-Lmin)/(Lmax-Lmin)]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 (Llow).
8) Set the reference value R,G,B of Point 1 (Ref.1)=640 x (40/P1)
where P1=255 x [(Llow-Lmin)/(Lmax-Lmin)]1/2.2
9) Set the specified gradation for point 1. Set G of point 1 to the default value [(Ref.1 x
G value of point 2/Ref.2), with fractions rounded] and adjust RB to the reference
value of point 1.
10)Set the G of point Max. to the default value (4080 x G value of point 2/Ref.2). Set
the R,B Max. value [Gmax-G value of point 2 + (R,B value of point 2)].
11)Adjusted value is writing at [command] MSET0003.
12)Shut down the AC power.
*Initial value at RGB 2 point : 2032
*Initial value at RGB 1 point : 640
[Adjustment Value]
Teaching set send by engineering dept is set as reference.
[Reference value for adjustment reference]
Equipment: Luminance meter [Minolta CA-210]
Level
Point 2
x=0.272
ref. 127
y=0.277
values
Point 1
x=0.272
ref. 40
y=0.277
values
Ref. : For inspection, set the LCD TV as below.
AV MODE: [DYNAMIC] (Reset)
Aging Time: Minimum 30 minutes
5 – 4
Spec Adjustment
Data Spec.
0.0010
0.0045
LC-32LE345T
Inspection
Spec.
0.0020
0.0090