Sharp LC-22AD1E Service Manual page 25

(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 .
WHITE 70%
White balance adjustment pattern
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].
WHITE 70%
GRAY 40%
Adjustment range
Inspection range
White balance adjustment values
*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.
h) To exit the adjustment process mode, press the "STANDBY-OFF" or "MAIN POWER-OFF" key.
GRAY 40%
Fig. 5-1
(PAL signal)
x y y(ref)
0.278 0.283 154
0.257 0.264 1.797
±0.002
±0.003
Fig. 5-3
25
[FLI2310] : 2
R CUT OFF
G CUT OFF
B CUT OFF
R DRIVE
G DRIVE
B DRIVE
MOTION THRESH
VE GAIN2
NR
NR LEVEL
Fig. 5-2
Adjustment process menu [FLI2310]
Screen from the second page of the second layer
LC-22AD1E
0
0
0
100
100
100
2F
2
ON
2