Sony DSC-U20 (serv.man4) Service Manual ▷ View online
DSC-U20
6-23
2.
LCD Initial Data Input (2)
Mode
PLAY
Signal
Arbitrary
Adjustment Page
5F
Adjustment Address
F0 to FC
Input method:
1) Select page: 00, address: 01, and set data: 01.
2) Select page: 5F, and write the data given in the following table.
1) Select page: 00, address: 01, and set data: 01.
2) Select page: 5F, and write the data given in the following table.
Address
Data
Remark
F0
00
F1
00
F2
90
F3
FF
F4
00
F5
1F
Fixed value
F6
17
F7
38
F8
28
F9
00
FA
40
FB
40
FC
40
Processing after Completing Input:
1)
1)
Select page: 00, address: 01, and set data: 00.
2)
Press the RESET switch at the bottom of the set using a thin
and long pin.
and long pin.
DSC-U20
6-24
3.
VG Center Adjustment
Set the center of VG signal for driving the LCD to the specified
value.
value.
Mode
PLAY
Signal
Arbitrary
Measurement Point
Data of page: 50, address: 82, 83,
8A and 8B (2byte data) (Note 1)
8A and 8B (2byte data) (Note 1)
Adjustment Page
4F
Adjustment Address
89
Specified Value
VG = 1FC to 204
Note 1:
2byte data is upper 1byte data and lower 1byte data.
XX XX
Lower 1byte data
(Page: 50, address: 83 or 8B)
Upper 1byte data
(Page: 50, address: 82 or 8A)
(Page: 50, address: 83 or 8B)
Upper 1byte data
(Page: 50, address: 82 or 8A)
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
4F
89
33
[Write]
4
50
90
01
[Set]
5
50
90
00
[Set]
6
50
82
[Read]
Read the data
(Upper 1byte).
(Upper 1byte).
7
50
83
[Read]
Read the data
(Lower 1byte).
(Lower 1byte).
8
This 2byte data (Note
1) is named VG1.
1) is named VG1.
9
50
8A
[Read]
Read the data
(Upper 1byte).
(Upper 1byte).
10
50
8B
[Read]
Read the data
(Lower 1byte).
(Lower 1byte).
11
This 2byte data (Note
1) is named VG2.
1) is named VG2.
12
Calculate VG using
following equations.
(hexadecimal calcula-
tion)
following equations.
(hexadecimal calcula-
tion)
VG = (VG1 + VG2)
÷
2
13
Check that the VG
satisfies the specified
value. (Note 2)
satisfies the specified
value. (Note 2)
Note 2:
When VG does not satisfy the specified value, select page:
4F, address: 89, and write the different data (refer to the
following table), then retry the procedure from 4 to 13.
4F, address: 89, and write the different data (refer to the
following table), then retry the procedure from 4 to 13.
VG is smaller than the specified value
Increase the data
VG is larger than the specified value
Decrease the data
Processing after Completing Adjustment:
Order Page Address
Data
Procedure
1
40
89
00
[Set]
2
Release “Data setting
during LCD system
adjustment”
(Refer to page 6-22)
during LCD system
adjustment”
(Refer to page 6-22)
DSC-U20
6-25
4.
Bright Adjustment
Set the amplitude of the RGB decoder for driving the LCD to the
specified value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
specified value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode
PLAY
Signal
Arbitrary
Measurement Point
Data of page: 50, address: 82, 83,
8A and 8B (2byte data) (Note 1)
8A and 8B (2byte data) (Note 1)
Adjustment Page
4F
Adjustment Address
83
Specified Value
VG = 1F9 to 201
Note 1:
2byte data is upper 1byte data and lower 1byte data.
XX XX
Lower 1byte data
(Page: 50, address: 83 or 8B)
Upper 1byte data
(Page: 50, address: 82 or 8A)
(Page: 50, address: 83 or 8B)
Upper 1byte data
(Page: 50, address: 82 or 8A)
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
4F
83
BF
[Write]
4
50
90
01
[Set]
5
50
90
00
[Set]
6
50
82
[Read]
Read the data
(Upper 1byte).
(Upper 1byte).
7
50
83
[Read]
Read the data
(Lower 1byte).
(Lower 1byte).
8
This 2byte data (Note
1) is named VG1.
1) is named VG1.
9
50
8A
[Read]
Read the data
(Upper 1byte).
(Upper 1byte).
10
50
8B
[Read]
Read the data
(Lower 1byte).
(Lower 1byte).
11
This 2byte data (Note
1) is named VG2.
1) is named VG2.
12
Calculate VG using
following equations.
(hexadecimal calcula-
tion)
following equations.
(hexadecimal calcula-
tion)
VG = VG1 – VG2
(VG: absolute value)
13
Check that the VG
satisfies the specified
value. (Note 2)
satisfies the specified
value. (Note 2)
Note 2:
When VG does not satisfy the specified value, select page:
4F, address: 83, and write the different data (refer to the
following table), then retry the procedure from 4 to 13.
4F, address: 83, and write the different data (refer to the
following table), then retry the procedure from 4 to 13.
VG is smaller than the specified value
Increase the data
VG is larger than the specified value
Decrease the data
Processing after Completing Adjustment:
Order Page Address
Data
Procedure
1
40
89
00
[Set]
2
Release “Data setting
during LCD system
adjustment”
(Refer to page 6-22)
during LCD system
adjustment”
(Refer to page 6-22)
DSC-U20
6-26
5.
Contrast Adjustment
Set the level of the VIDEO signal for driving the LCD to the speci-
fied value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
fied value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode
PLAY
Signal
Arbitrary
Measurement Point
Data of page: 50, address: 82, 83,
8A and 8B (2byte data) (Note 1)
8A and 8B (2byte data) (Note 1)
Adjustment Page
4F
Adjustment Address
88
Specified Value
VG = 91 to 99
Note 1:
2byte data is upper 1byte data and lower 1byte data.
XX XX
Lower 1byte data
(Page: 50, address: 83 or 8B)
Upper 1byte data
(Page: 50, address: 82 or 8A)
(Page: 50, address: 83 or 8B)
Upper 1byte data
(Page: 50, address: 82 or 8A)
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
01
[Set]
3
4F
88
5A
[Write]
4
50
90
01
[Set]
5
50
90
00
[Set]
6
50
82
[Read]
Read the data
(Upper 1byte).
(Upper 1byte).
7
50
83
[Read]
Read the data
(Lower 1byte).
(Lower 1byte).
8
This 2byte data (Note
1) is named VG1.
1) is named VG1.
9
50
8A
[Read]
Read the data
(Upper 1byte).
(Upper 1byte).
10
50
8B
[Read]
Read the data
(Lower 1byte).
(Lower 1byte).
11
This 2byte data (Note
1) is named VG2.
1) is named VG2.
12
Calculate VG using
following equations.
(hexadecimal calcula-
tion)
following equations.
(hexadecimal calcula-
tion)
VG = VG1 – VG2
(VG: absolute value)
13
Check that the VG
satisfies the specified
value. (Note 2)
satisfies the specified
value. (Note 2)
Note 2:
When VG does not satisfy the specified value, select page:
4F, address: 88, and write the different data (refer to the
following table), then retry the procedure from 4 to 13.
4F, address: 88, and write the different data (refer to the
following table), then retry the procedure from 4 to 13.
VG is smaller than the specified value
Decrease the data
VG is larger than the specified value
Increase the data
Processing after Completing Adjustment:
Order Page Address
Data
Procedure
1
40
89
00
[Set]
2
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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