Sony CyberShot DSC-P72 Service Manual page 54

DSC-P72
5. PSIG Level Adjustment (SY-85 board)
Set the PSIG signal level to an appropriate level.
Note: Do either of "Adjustment without Using Oscilloscope" or
"Adjustment Using Oscilloscope".
5-1. Adjustment without Using Oscilloscope
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 00 01
2 40 F1
3 4F 02
4 40 10
5 40 10
6 40 11
7 40 12
8 40 10
9 40 11
10 40 12
11
12
13
14 4F 87
15 4F 87
16 4F 02
17 40 F1
18 00 01
Note1: When dividing D
12A
decimal point, truncate it.
Note2: When the signal level is smaller than specified value, increase the
data.
PLAY ( )
Arbitrary
Data of page: 40, address: 11, 12
4F
87
170 to 178
Procedure
01 Set the data.
02 Write the data.
03 Write the data.
00 Write the data.
80 Write the data.
Read the data, and this data is
named D .
11A
Read the data, and this data is
named D .
12A
81 Write the data.
Read the data, and this data is
named D .
11B
Read the data, and this data is
named D .
12B
Calculate D and D using
A B
following equation.
(Hexadecimal calculation.)
(Note1)
× 4+ D
D = (D
A 11A 12A
× 4+ D
D = (D
B 11B 12B
Calculate the signal level using
following equation.
(Hexadecimal calculation.)
When D D
A B
Signal level = D - D
A
When D < D
A B
Signal level = D - D
B
When the signal level satisfies the
specified value proceed to step 16,
in case of others proceed to step
14.
Change the data. (Note2)
Write the data, and return to step
4.
00 Write the data.
00 Write the data.
00 Set the data.
or D by 40. If there is a fraction below
12B
5-2. Adjustment Using Oscilloscope
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 00
2 40
3 4F
4 4F
5 4F
6 4F
7 40
8 00
/ 40)
/ 40)
B
A
6-34
PLAY ( )
Arbitrary
CL804 (Pin ws of CN702) (VCOM)
Oscilloscope
4F
87
A = 5.00 ± 0.05V
Procedure
01 01 Set the data.
F1 02 Write the data.
02 03 Write the data.
87 Change the data and set the
signal level (A) to the specified
value.
87 Write the data.
02 00 Write the data.
F1 00 Write the data.
01 00 Set the data.
2H
Fig. 6-1-16.
A