Sharp AQUOS LC-22AD1E, Service Manual

Page: 25 / 111

25
LC-22AD1E
(5) White balance adjustment
This TV input white balance adjusted.
This adjustment is performed when the LCD is replaced and the white balance must be set.
a) Bring up the pattern shown in Fig. 5-1 on AV1, AV2 or AV3 using a signal generator .
b) Refer to the item 2 on page22 to Entering the adjustment process mode.
c) Use the cursor “(
'
)/(
"
)” keys to bring up the second page. Select [FLI2310] using the cursor
“(
'
)/(
"
)” keys, and then press the “OK” key.
You can also press the cursor “(
"
)” key to bring up the second page of the second layer.
• In this case, although the screen from the second page of [FLI2310] is brought up (shown in Fig. 5-2),
make sure the CUT OFF settings for [R], [G], and [B] are [0] and the DRIVE settings for [R], [G], and [B]
are [100].
If they are not [0] and [100], set them.
• Use the cursor “(
Û
)/(
û
)” key to set them to [0] and [100].
d) Prepare and install a standard luminance meter (for example, a Minolta CA-110).
e) Use the cursor “(
'
)/(
"
)” keys to bring up the second page. Select “FLI2310”, and then press the
“OK” key. Press the cursor “(
"
)” key to bring up the second page of the second layer.
f) Fig. 5-3 shows the standard adjustment value for the white balance.
g) Adjust the chromaticity of x and y for the six CUT OFF and DRIVE colour items on the screen shown in
Fig.5-2. Use the cursor “(
Û
)/(
û
)” keys so that the values shown for White 70% and Gray 40% are the
same as the values shown in Fig. 5-3.
• In this case, each of the set values of R, G, and B is out of [0] or [100].
[FLI2310] : 2
R CUT OFF 0
G CUT OFF 0
B CUT OFF 0
R DRIVE 100
G DRIVE 100
B DRIVE 100
MOTION THRESH 2F
VE GAIN2 2
NR ON
NR LEVEL 2
WHITE 70% GRAY 40%
Fig. 5-1
White balance adjustment pattern
(PAL signal)
Fig. 5-2
Adjustment process menu [FLI2310]
Screen from the second page of the second layer
x y y(ref)
WHITE 70% 0.278 0.283 154
GRAY 40% 0.257 0.264 1.797
Fig. 5-3
White balance adjustment values
Adjustment range
±
0.002
Inspection range
±
0.003
h) To exit the adjustment process mode, press the “STANDBY-OFF” or “MAIN POWER-OFF” key.
*1.The adjustment should be performed after a 30-minute aging.
*2.The CUT OFF value should be adjusted within the range of
±
0 ~ 25.
The DRIVE value should be adjusted within the range of
±
0 ~ 25.