White Balance Adjustment - Sharp LC-22DC30M Service Manual

5.2. White balance adjustment

Adjustment item
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
SBSL16_ _
Multi point adj. Mode
MSET0000
WBI20255
Point 2
WBI20229
MG2G****
MG2B****
MG2R****
Point 1
WBI10051
MG1G****
MG1B****
MG1R****
Write
MSET0003
Set Max.Level
MGMG****
MGMB****
MGMR****
Adjustment conditions
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/1000.
4) Measure Point 2 brightness (Lhigh).
5) Set the reference value R,G,B of Point 2 (Ref.2)=3664 x (229/P2)
6) Set the specified gradation for point 2, fix the most faint colour to get reference
7) Measure Point 1 brightness (Llow).
8) Set the reference value R,G,B of Point 1 (Ref.1)=816 x (51/P1)
9) Set the specified gradation for point 1. Set G of point 1 to the default value [(Ref.1 x
10)Set the G of point Max. to the default value (4080 x G value of point 2/Ref.2). Set
11)Adjusted value is writing at [command] MSET0003.
12)Shut down the AC power.
[Adjustment Value]
ITeaching set send by engineering dept is set as reference.
[Reference value for adjustment reference]
Equipment: Luminance meter [Minolta CA-210]
Ref. : For inspection, set the LCD TV as below.
Adjustment procedure
where P2=255 x [(Lhigh-Lmin)/(Lmax-Lmin)]1/2.2
value, adjust others 2 colour to minus adjustment for reference value of point 2.
where P1=255 x [(Llow-Lmin)/(Lmax-Lmin)]1/2.2
G value of point 2/Ref.2), with fractions rounded] and adjust RB to the reference
value of point 1.
the R,B Max. value [Gmax-G value of point 2 + (R,B value of pint 2)].
*Initial value at RGB 2 point : 3664
*Initial value at RGB 1 point : 816
Spec
Level
Data
Point 2
x=0.281
229
ref.
y=0.288
values
Point 1
x=0.272
ref.
51
y=0.277
values
AV MODE: [DYNAMIC] (Reset)
Aging Time: Minimum 60 minutes
5 – 4
LC-22DC30M
Adjustment Inspection
Spec. Spec.
0.0010 0.0020
0.0045 0.0090