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White Balance adjustment
Instrument
1.
White balance meter.
2.
Window pattern generator.
Preparation
1.
Apply a window pattern.
2.
Picture menu : Dynamic Normal, AI : off, PNR : off.
3.
White Peek effect : off.
4.
Set a Flood of WB meter on Screen Center.
Procedure
1.
Adjust the DAC (R-DRIVE, B-DRIVE, R-CUTOFF, B-CUTOFF) so that Ratio R/G and B/G is within 100±2% with WB meter.
(See Below)
(See Below)
Sub-picture White Balance Adjustment
Instrument
1.
White balance meter.
2.
Signal generator.
Preparation
1.
Aging should have been performed over 30 minutes.
2.
Receive a black pattern on main-picture.
3.
Receive a white pattern on sub-picture.
4.
Picture menu : Dynamic Normal, AI : off.
5.
Move sub picture to the center position of the main picture.
6.
Fix the white balance meter receiver unit to sub picture screen.
Note:
Take care that light does not enter from outside.
CRT cut off and sub bright adjustment is completed.
Procedure
1.
Adjust SUB BRIGHT2 (CHK5), so that the BRIGHTNESS of Sub-Picture is 30[cd/m
2
].
2.
Adjust R-Y OUT (CHK5) and B-Y OUT (CHK5), so that Ratio of R/G and B/G is within 100±2%.
3.
Change the data of SUB BRIGHT 2 to Original data
.
ADJ.
LUM.
[cd/m
2
]
R/G
B/G
TARGET
X,Y
COLOR TEMP.
MPCD
HI
200
R DRIVE
B DRIVE
X : 0.275
Y : 0.288
Y : 0.288
1100±500K
+8
±5
±5
LOW
5
R CUT OFF
B CUT OFF
X : 0.301
Y : 0.313
Y : 0.313
7400±500K
+8
±5
±5
TARGET
X,Y
COLOR TEMP
X : 0.2654
14900K-7MPCD
Y : 0.2642
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