Read Sony DSC-U30 (serv.man4) Service Manual online
DSC-U30
6-28
7.
White Balance Adjustment (LCD Light OFF)
Correct the white balance.
If deviated, the LCD screen color cannot be reproduced.
If deviated, the LCD screen color cannot be reproduced.
Note:
Check the white balance only when replacing the follow-
ing parts. If necessary, adjust them.
1. LCD901 (LCD panel)
2. IC401
1. LCD901 (LCD panel)
2. IC401
7-1.
White Balance Adjustment (LCD Light OFF (VR))
Mode
PLAY
Signal
Arbitrary
Measurement Point
Data of page: 50, address: 80, 81,
88 and 89 (2byte data) (Note 1)
88 and 89 (2byte data) (Note 1)
Adjustment Page
4F
Adjustment Address
8A
Specified Value
VR = 106 to 10E
Note 1:
2byte data is upper 1byte data and lower 1byte data.
XX XX
Lower 1byte data
(Page: 50, address: 81 or 89)
Upper 1byte data
(Page: 50, address: 80 or 88)
(Page: 50, address: 81 or 89)
Upper 1byte data
(Page: 50, address: 80 or 88)
Adjusting method:
Order Page Address
Data
Procedure
1
Perform “Data setting
during LCD system
adjustment”
(Refer to page 6-22)
during LCD system
adjustment”
(Refer to page 6-22)
2
40
89
03
[Set]
3
40
8A
01
[Set]
4
4F
8A
90
[Write]
5
50
90
01
[Set]
6
50
90
00
[Set]
7
50
80
[Read]
Read the data
(Upper 1byte).
(Upper 1byte).
8
50
81
[Read]
Read the data
(Lower 1byte).
(Lower 1byte).
9
This 2byte data (Note
1) is named VR1.
1) is named VR1.
10
50
88
[Read]
Read the data
(Upper 1byte).
(Upper 1byte).
11
50
89
[Read]
Read the data
(Lower 1byte).
(Lower 1byte).
12
This 2byte data (Note
1) is named VR2.
1) is named VR2.
13
Calculate VR using
following equations.
(hexadecimal calcula-
tion)
VR = VR1 – VR2
(VR: absolute value)
following equations.
(hexadecimal calcula-
tion)
VR = VR1 – VR2
(VR: absolute value)
14
Check that the VR
satisfies the specified
value. (Note 2)
satisfies the specified
value. (Note 2)
Note 2:
When VR does not satisfy the specified value, select page:
4F, address: 8A, and write the different data (refer to the
following table), then retry the procedure from 5 to 14.
4F, address: 8A, and write the different data (refer to the
following table), then retry the procedure from 5 to 14.
VR is smaller than the specified value
Decrease the data
VR is larger than the specified value
Increase the data
Processing after Completing Adjustment:
Order Page Address
Data
Procedure
1
40
89
00
[Set]
2
40
8A
00
[Set]
3
Release “Data setting
during LCD system
adjustment”
(Refer to page 6-22)
during LCD system
adjustment”
(Refer to page 6-22)
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