Sony DSC-P30 / DSC-P50 (serv.man2) Service Manual ▷ View online
5-32
3. VCO Adjustment (SY-66 Board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
be blurred.
Mode
PLAY
Signal
Arbitrary
Measurement Point
CH1: Pin 7 of CN706
(HSY)
CH2: Video terminal of A/V
OUTjack
(75
(75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D7 (NTSC)
DD (PAL)
DD (PAL)
Specified Value
T = 2.04
±
0.1
µ
s (NTSC)
T = 3.06
±
0.1
µ
s (PAL)
Menu setting:
1) VIDEO OUT of SET UP menu
1) VIDEO OUT of SET UP menu
.................................. NTSC (NTSC mode)
(This adjustment must be performed in NTSC mode, so don’t
set the menu setting to “PAL” )
set the menu setting to “PAL” )
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Change the data and set the
2
D
D7
phase difference (T) to the
NTSC specified value.
NTSC specified value.
3
D
D7
Press PAUSE button.
Change the data and set the
4
D
DD
phase difference (T) to the
PAL specified value.
PAL specified value.
5
D
DD
Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
0
01
00
H
T
CH2
magnified
CH1
CH2
CH1
T: Between the center of HSY signal rising and
VIDEO SYNC signal rising
Fig. 5-1-20
5-33
2H
A
A: Between the reversed waveform peak and non-reversed
waveform peak
4. Black Limit Adjustment (SY-66 Board)
Set the maximum 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).
LCD to the specified value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode
PLAY
Signal
Arbitrary
Measurement Point
Pin 9 of CN706 (VG)
External trigger: Pin 8 of CN706
(PEARL COM)
External trigger: Pin 8 of CN706
(PEARL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D5
Specified Value
A = 8.20
±
0.1 Vp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
F1
03
3
D
D0
Note down the data.
4
D
D0
20
Press PAUSE button.
Change the data and set the
5
D
D5
voltage (A) to the specified
value.
value.
6
D
D5
Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
4
F1
00
2
D
D0
Set data noted down at step 3,
and press PAUSE button.
and press PAUSE button.
3
0
01
00
Fig. 5-1-21
5-34
5. Bright Adjustment (SY-66 Board)
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
Pin 9 of CN706 (VG)
External trigger: Pin 8 of CN706
(PEARL COM)
External trigger: Pin 8 of CN706
(PEARL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D0
Specified Value
A = 7.96
±
0.1 Vp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
10
01
3
4
F1
03
Change the data and set the
4
D
D0
voltage (A) to the specified
value.
value.
5
D
D0
Press PAUSE button.
6
D
D0
Read the data and this data is
named Dref.
named Dref.
7
Convert Dref to decimal
notation, and obtain Dref’.
(Note)
notation, and obtain Dref’.
(Note)
8
Calculate D
CE
’ and D
DE
’ using
following equations.
(decimal calculation)
D
(decimal calculation)
D
CE
’ = Dref’ – 48
D
DE
’ = Dref’ + 48
9
Convert D
CE
’ and D
DE
’ to
hexadecimal numbers, and
obtain D
obtain D
CE
and D
DE
. (Note)
10
D
CE
D
CE
Press PAUSE button.
11
D
DE
D
DE
Press PAUSE button.
Note:
Refer to table 5-2-2. “Hexadecimal-decimal conversion
table”.
table”.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
4
F1
00
2
4
10
00
3
0
01
00
2H
Pedestal
Pedestal
A
A: Between the reversed waveform pedestal and non-reversed
waveform pedestal
Fig. 5-1-22
5-35
2H
A
Pedestal
10 steps peak
A: Between the pedestal and 10 steps peak
6. Contrast Adjustment (SY-66 Board)
Set the level of the VIDEO signal 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
Pin 9 of CN706 (VG)
External trigger: Pin 8 of CN706
(PEARL COM)
External trigger: Pin 8 of CN706
(PEARL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D4
Specified Value
A = 2.50
±
0.05 Vp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
F1
03
Change the data and set the
3
D
D4
voltage (A) to the specified
value.
value.
4
D
D4
Press PAUSE button.
5
D
D4
Read the data and this data is
named Dref.
named Dref.
6
D
CF
Dref
Press PAUSE button.
7
D
DF
Dref
Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
5
F1
00
2
0
01
00
7. Color Adjustment (SY-66 Board)
Set the color saturation to the standard value.
If, deviated, the color will be dark or light.
If, deviated, the color will be dark or light.
Mode
PLAY
Signal
Arbitray
Measurement Point
Pin 9 of CN706 (VG)
External trigger: Pin 8 of CN706
(PEARL COM)
External trigger: Pin 8 of CN706
(PEARL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D1
Specified Value
A = 324
±
50 mVp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
F1
04
Change the data and set the
2
D
D1
voltage (A) to the specified
value.
value.
4
D
D1
Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
4
F1
00
2
0
01
00
Fig. 5-1-23
2H
A
Green
White 100%
A: Between the white 100% (Reference level) and green
Fig. 5-1-24
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