White Balance Adjustment - Panasonic TC-26LX70L Service Manual

TC-26LX70L / TC-32LX70L

12.2. White balance adjustment

Instrument Name
1. Remote control
2. LCD WB meter (Minolta CA-110 equivalent)
3. Communication jig
4. Computer for external control
Procedure
1. Enter the White Balance adjustment mode in Check mode, It checked 300cd/m2 or more that measure
luminance when white.
(Display menu: vivid-basic, LCD-AI: off, backlight: +30)
(If it is 300cd/m2 or less, measures again when cold on after 30 minutes.)
2. It decide "basic color-1" and "basic color-2" when peak adjustment that to measure luminance and the
degree coordinates of color when white.
3. The degree of color is set to a target two other than "basic color-1" (locked 0xff) of R-GAIN, G-GAIN and
B-GAIN, when displayed white. If can not set to the degree of target color, The degree of color is set to a
target two other than "basic color-2" (locked 0xff) of two item.
color temp. - cool
target color (x0,y0) =(0.271±0.002, 0.275±0.002)
color temp. - normal
target color (x0,y0) =(0.285±0.002, 0.293±0.002)
color temp. - warml
target color (x0,y0) =(0.314±0.002, 0.324±0.002)
basic-color1/2 RED
Adjust x-axis B-GAIN
Adjust x-axis B-GAIN
* Point of the degree coordinates of color becomes large when R-GAIN and G-GAIN are enlarged. Point
of the degree coordinates of color becomes small when B-GAIN is enlarged.
* Case of adjust by remote controller, It chooses from the items of R-GAIN,G-GAIN and B-GAIN by [3]
and [4] key on remote controller.
And value is changed by volume [+] and [-] key.
It will be easy to converge if
4. Next, The degree of color is set to a target two other than "basic color : G-CENT" (locked 0x80) of R-
CENT and CENT when displayed gray.
basic-color GREEN The method of adjustment
Adjust x-axis R-CENT When it is enlarged that point of the degree
Adjust y-axis B-CENT When it is enlarged that point of the degree
*Case of adjust by remote controller, It chooses from the items of R-CENT, and B-CENT by [3] and [4]
key on remote controller.
And value is changed by volume [+] and [-] key.
5. If It converges on the degree of target color, the data is written to EEPROM.
*Case of adjust by remote controller, Long aggressiveness [8] key on remote controller in the state of R-
CENT,G-CENT and B-CENT
6. Check to the degree coordinates of color when white and gray are in
x=0.271±0.003 y=0.275±0.003 (when color temp is cool)
x=0.285±0.010 y=0.293±0.010 (when color temp is normal)
x=0.314±0.015 y=0.324±0.015 (when color temp is warm)
GREEN BLUE
R-GAIN R-GAIN
R-GAIN R-GAIN
is adjusted preferentially
coordinates of color becomes large.
coordinates of color becomes small.
24
Remarks
Measurement distance is 21cm
Remarks
Time to aging is a thing for 20
minutes or more.
The panel is left for three hours
or more in 20-25 °C.
All processes from assembly to
completion are done in a
surrounding environment from
the room temperature 20 °C to
25 °C.
Change to the color temp. by
remote controller or PC. and
Adjustment forthree color.