White Balance Adjustment - Sharp LC-32XL8E/S/RU Service Manual

7. PC signal adjustment (ANALOG D-sub15PIN)
Adjustment point
1 Setting
2 Auto adjustment
performance
8. RGB adjustment (SCART)
Adjustment point
1 Setting
2 Auto adjustment
performance

10. White Balance Adjustment

For white balance adjustment, adjust the offset values on pages 12/14.
[Condition of the unit for inspection]: PC mode, backlight (+16), colour temp (High)
[Input signal condition]
[Adjustment reference device]
[Input signal condition]
[Adjustment]
1) Display the current adjustment status at point HI. (Page 12/14 of process adjustment)
Feed the 78IRE signal.
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 12/14 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 and B must be fixed.)
4) Display the adjustment status of the current point LO.
Feed the 15IRE signal
Change R GAIN(LO)/ B GAIN(LO) (adjustment offset value) on page 12/14 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)
11. Confirmation item
1. Magi-Link Inspection
The thing that the Magi-Link circuit operates is confirmed.
2. HDMI-CEC Inspection
The thing that the HDMI-CEC circuit operates is confirmed.
Adjustment Conditions
[Signal]
XGA 60Hz
100% Full Field Colour Bar sig-
nal
[Terminal]
EXT7 PC IN
Page 8/14
Adjustment Conditions
[Signal]
RGB15K, 50Hz
100% Full Field Colour Bar sig-
nal
[Terminal]
EXT1 SCART IN
Page 9/14
: HDMI 1080i 15IRE(LO), 78IRE(HI)
: Minolta CA-210
: HDMI 1080i 15IRE(LO), 78IRE(HI)
LC-32XL8E/S/RU, LC-37XL8E/S/RU
Adjustment procedure
• Feed the XGA 60Hz 100% full field colour bar signal (100% colour satura-
tion) to EXT7 PC IN.
100% white
Bring the cursor on [ANALOG PC ADJ] and press [OK]
[ANALOG PC ADJ OK] appears when finished.
Adjustment procedure
• Feed the RGB15k 50Hz 100% full field colour bar signal (100% colour satu-
ration) to EXT1 SCART IN.
100% white
Bring the cursor on [SCART RGB ADJ] and press [OK]
[SCART RGB ADJ OK] appears when finished.
3 – 13
Black
Black