Panasonic P50GT30, Service Manual

Page: 32 / 118

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10.1.3. White balance adjustment
Name of measuring instrument Remarks
Color analyzer
(Minolta CA-100 or equivalent)
Note:
The CA-100 which was calibrated to less than +-0.001 with CS-1000.
Note:
When white balance adjustment is exe-
cuted, The TV set should be display some
video signal, or select VIDEO input (with no
signal) or select component input (with no
signal).
WB adjustment function will not be worked
when digital TV (with no signal) or HDMI
input (with no signal) is selected.
Steps Remarks
• Make sure the front panel to be used on the final set is fitted.
• Make sure a color signal is not being shown before adjustment.
• Put the color analyzer where there is little color variation.
1. Set to Service mode, WB-ADJ.
2. Select [VIVID] for picture menu.
3. Select [Cool] for color temperature.
4. Push [5] key of remote controller to display window pattern.
5. Confirm the brightness. The following is the confirmation value.
TC-P55GT30 124cd/m2 or more
6. Select [Cinema] for picture menu.
7. Select [Warm] for color temperature.
8. Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.
9. Attach the sensor of color analyzer to the center of window pattern.
10. Fix [G drive] at [C0] and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer
become the [Color temperature Low] in table 2.
11. Increase RGB together so the maximum drive value in RGB becomes [FF]. That is, set
[ALL DRIVE] to [FF].
Execute adjustment again. When that, the maximum value of R/G/B DRV should be [FF],
and either R/G/B DRV should be [FF].
12. The average of the adjusted values in color temperature Cool, Mid, and Warm is shown in
Table 4.
The setting value for color temperature Cool will be calculated by multiplying the adjusted
value of color temperature Warm to the ratio of the value of Warm and Cool in each GBR
value in Table 4.
Write that values to the data area of color temperature Cool in EEPROM.
13. The setting value for color temperature Mid will be calculated by multiplying the adjusted
value of color temperature Warm to the ratio of the value of Warm and Mid in each GBR
value in Table 4.
Write that values to the data area of color temperature Mid in EEPROM.
14. Select [Vivid] for picture menu when you check the adjusted data of Cool and Normal.
Note:
Adjusted value must be written to both SD
data area and HD data area of the
EEPROM.