White Balance Adjustment - Sharp LC-26GA5H Service Manual

(7) HDTV signal adjustment
Adjustment item
1 Adjustment
2 Auto adjustment Page 8/14
performance

9. White balance adjustment

(1) White balance adjustment
Adjustment item
1 Setting
2 Automatic
adjustment
Adjustment conditions
Feed the 33k (1080i/60Hz) Full-field color bar signal (100% Colour
(SIGNAL)
saturation) to INPUT1 video input.
1080i signal
∫
COMP 33k 60Hz
Full-field Colour
bar signal
(TERMINAL)
∫
INPUT1 component
input teriminal
Bring the cursor on [ËHDTV ADJ] and press [ENTER].
[ËHDTV ADJ FINISH] appears when finished.
Adjustment conditions
1. Place the set under the following conditions.
AV mode: DYNAMIC
Aging time: Min. 60 minutes
2. Connect the white balance adjustment instrument to the set.
Optical instrument: Minolta CA-210
PC
RS-232C communication cable
3. Using the RS-232C command, get the two-point adjustment screen
displayed.
∫ Two-point adjustment mode (MSET0000)
∫ Adjustment value initialization (MSET0004)
∫ Low-level adjustment point setting (SDML0070)
∫ High-level adjustment point setting (SDMH0187)
1. Set the low-level adjustment point to 57 (SDML0070). Using a
command, adjust the RB setting so that the chromaticity level of low-
level adjustment pattern should become as specified. <G fixed>
2. Set the high-level adjustment point to 204 (SDMH0187). Using a
command, adjust the RGB setting so that the chromaticity level of high-
level adjustment pattern should become as specified.
<Negative adjustment>
3. Using the MSET0003 command, write the adjusted settings and turn off
the AC power.
[Adjustments]
Optical instrument: Minolta CA-210, screen center to be in focus
Adjustment procedure
↑100% white
Adjustment procedure
High-level values
Low-level values
Remarks Adjustment preset conditions
25
LC-26GA5H/M/X
Reference point
x=0.272
y=0.275
x=0.272
y=0.275