DSC-P72 (serv.man4) - Sony Digital Camera Service Manual (repair manual). Page 22

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DSC-P72
9. Auto White Balance 3200K Check
Check that the white balance standard data at 3200K are inputted
properly.
Mode
STILL ( 
 )
Subject
Clear chart
(Standard picture frame)
Measurement Point
Data of page: 10, address: 08, 09, 0A,
0B, 59, 5B
Measuring Instrument
Data of page: 6F, address: 74, 76, B5
Specified value 1
R ratio = 3F00 to 4100
Specified value 2
B ratio = 3F00 to 4100
Specified value 3
R-Y data = 7A to 86
Specified value 4
B-Y data = 7A to 86
Specified value 5
R/G data = 20 to 60
Specified value 6
B/G data = 10 to 40
Specified value 7
00
Note:
If the data of page: 60, address: 02 is “01”, select page: 60, address:
01, and write data: 00.
Switch setting:
ZOOM .................................................................... WIDE end
CAMERA setting (Menu setting) ................................ AUTO
Adjusting method:
Order Page Address Data
Procedure
1
Check that “1. Data Setting during
Camera System Adjustments” is
performed.
2
Check the picture frame.
If deviated, perform “4. Picture
Frame Setting”.
3
00
01
01
Set the data.
4
6F
B5
FF
Write the data.
3200K standard data Check (1)
5
60
37
0D
Write the data.
6
60
01
11
Write the data.
7
Wait for 1 sec.
8
60
38
Read the data, and check it is “01”.
9
60
01
C1
Write the data.
10
Wait for 1 sec.
11
60
02
Read the data, and check it is “01”.
12
10
08
Read the data, and this data is
named D
08
.
13
10
09
Read the data, and this data is
named D
09
.
14
Calculate R ratio using the
following equation
(Hexadecimal calculation)
   R ratio = D
08
 
×
 100 + D
09
15
Check that R ratio satisfies the
specified value1.
16
10
0A
Read the data, and this data is
named D
0A
.
17
10
0B
Read the data, and this data is
named D
0B
.
Order Page Address Data
Procedure
18
Calculate B ratio using the
following equation
(Hexadecimal calculation)
   B ratio = D
0A
 
×
 100 + D
0B
19
Check that B ratio satisfies the
specified value2.
20
10
59
Read the data (R-Y data), and check
it satisfies the specified value3.
21
10
5B
Read the data (B-Y data), and check
it satisfies the specified value4.
22
60
01
00
Write the data.
3200K standard data Check (2)
23
6F
74
Read the data (R/G data), and check
it satisfies the specified value 5.
24
6F
76
Read the data (B/G data), and check
it satisfies the specified value 6.
25
6F
B5
Read the data, and check it
satisfies the specified value 7.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
60
37
00
Write the data.
2
60
01
00
Write the data.
3
Perform next adjustments.
If finish the camera system
adjustments, release the data
setting.
(See “1. Data Setting during
Camera System Adjustments”.)
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