LC-90LE740X
5 – 12
10.7. ADC adjustment (Component 33K)
10.8. PC signal adjustment (ANALOG RGB)
11. White Balance Adjustment
For white balance adjustment, adjust the offset values on pages 11/20.
[Adjustment procedure]
1) Display the current adjustment status at R/G/B_GAIN (HI). (Page 11/20 of process adjustment)
The signal of 78IRE is input.
2) Read the value of the luminance meter. x = 0.272, y = 0.277
3) Change R_GAIN (HI)/B_GAIN (HI) (Adjustment offset value) on page 11/20 of process adjustment so that the values of the luminance meter
approach x = 0.272 and y = 0.277.
(Basically, G is not changed. If adjustment fails with R and B, change G. When G is lowered, the weaker of R or B must be fixed.)
4) Display the adjustment status of the current R/G/B_GAIN (LO).
The signal of 15IRE is input.
Change R_GAIN (LO)/B_GAIN (LO) (adjustment offset value) on page 11/20 of process adjustment so that the values of the luminance meter
approach x = 0.272 and y = 0.277.
5) Both HI and LO are repeating the step from 1 to 4 until becoming an aim value.
[Adjustment reference standard value]
Adjustment spec ± 0.002 Inspection spec ± 0.004 (point LO)
Adjustment spec ± 0.001 Inspection spec ± 0.002 (point HI)
6) After completing adjustments, set EEP SAVE (20/20) to ON in the process menu to save the white balance adjustment value.
Adjustment point Adjustment conditions Adjustment procedure
1 Setting [Signal]
COMP33K, 50Hz (1080i/50Hz)
100% Full field colour bar Signal
[Terminal]
INPUT5 COMPONENT IN
• Feed the COMPONENT 33K 100% full field colour bar signal (100%
colour saturation) to INPUT5 COMPONENT IN.
2 Auto adjustment
performance
Adjustment process
[HDTV ADJ]
page 7/20
Bring the cursor on [HDTV ADJ] and press [ENTER].
[HDTV ADJ OK] appears when finished.
Adjustment point Adjustment conditions Adjustment procedure
1 Setting [Signal]
XGA, 60Hz
100% Full Field Colour Bar Signal
[Terminal]
INPUT7 PC IN
• Feed the XGA 60Hz 100% full field colour bar signal (100% colour satura-
tion) to INPUT7 PC IN.
2 Auto adjustment
performance
Adjustment process
[ANALOG PC ADJ] menu
page 8/20
Bring the cursor on [ANALOG PC ADJ] and press [ENTER].
[ANALOG PC ADJ OK] appears when finished.
[Condition of the unit for inspection] : Modulated light (+16), Colour temperature (High)
AV MODE: DYNAMIC
Active Backlight: OFF
OPC: OFF
Asing Time: Min, 60 minute
[Input signal condition] : HDMI 1080i 15IRE (LO), 78IRE (HI)
[Adjustment reference device] : Minolta CA-210
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