Sony DSC-P20 (serv.man2) Service Manual ▷ View online
5-30
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
4
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. 5-1-18
2H
A
Green
White 100%
A: Between the white 100% (Reference level) and green
Fig. 5-1-19
5-31
8. VG Center Adjustment (SY-66 Board)
Set the center of VG signal for driving the LCD to the specified
value.
value.
Mode
PLAY
Signal
Arbitrary
Measurement Point
Pin 9 of CN706 (VG)
Measuring Instrument
Digital voltmeter
Adjustment Page
D
Adjustment Address
D6
Specified Value
A = 7.00 ± 0.05 V
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
F1
02
Change the data and set the
3
D
D6
DC voltage (A) to the specified
value.
value.
4
D
D6
Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
4
F1
00
2
0
01
00
9.
V-COM Adjustment (SY-66 Board)
Set the DC bias of the common electrode drive signal of LCD to
the specified value.
If deviated, the LCD display will be move, producing flicker and
conspicuous vertical lines.
the specified value.
If deviated, the LCD display will be move, producing flicker and
conspicuous vertical lines.
Mode
PLAY
Signal
Arbitrary
Measurement Point
Check on the LCD screen
Measuring Instrument
Adjustment Page
D
Adjustment Address
D8
Specified Value
The brightness difference
between the section-A and
section-B is minimum
between the section-A and
section-B is minimum
Note 1:
Perform “Bright Adjustment” and “Contrast Adjusstment”
before this adjustment.
before this adjustment.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
F1
02
3
4
10
02
4
D
D8
Change the data so that
brightness of the section A
and section B is equal.
brightness of the section A
and section B is equal.
5
D
D8
Read the data and this data is
named Dref.
named Dref.
6
Convert Dref to decimal
notation, and obtain Dref’.
(Note 2)
notation, and obtain Dref’.
(Note 2)
7
Calculate D
D8
’ using
following equations.
(decimal calculation)
D
(decimal calculation)
D
D8
’ = Dref’ – 13
8
Convert D
D8
’ to a hexadeci-
mal number, and obtain D
D8
.
(Note 2)
9
D
D8
D
D8
Press PAUSE button.
Note 2:
Refer to table 5-2-2. “Hexadecimal-decimal conversion
table”.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
4
F1
00
2
4
10
00
3
0
01
00
Fig. 5-1-20
A
A
A
A
B
B
B
B
5-32
10. White Balance Adjustment (SY-66 Board)
Correct the white balance.
If deviated, the LCD screen color cannot be reproduced.
If deviated, the LCD screen color cannot be reproduced.
Mode
PLAY
Signal
Arbitrary
Measurement Point
Check on the LCD screen
Measuring Instrument
Adjustment Page
D
Adjustment Address
D2, D3
Specified Value
LCD screen must not be colored
Note 1:
Check the white balance only when replacing the fol-
lowing parts. If necessary, adjust them.
lowing parts. If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC801
2. Light induction plate
3. IC801
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
F1
02
3
D
D2
57
Press PAUSE button.
D3
BD
(Initial value) (Note 2)
4
Check that the LCD screen is
not colored. If not colored,
proceed to “Processing after
Completing Adjustments”.
not colored. If not colored,
proceed to “Processing after
Completing Adjustments”.
5
D
D2
Change the data so that the
LCD screen is not colored.
LCD screen is not colored.
D3
(Note 2)
Note 2:
To write in the non-volatile memory (EEPROM), press
the PAUSE button each time to set the data.
the PAUSE button each time to set the data.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
4
F1
00
2
0
01
00
5-33
5-2. SERVICE MODE
2-1.
ADJUSTING REMOTE COMMANDER
The adjusting remote commander is used for changing the calcu-
lation coefficient in signal processing, EVR data, etc. The adjust-
ing remote commander performs bi-directional communication
with the unit using the remote commander signal line (LANC).
The resultant data of this bi-directional communication is written
in the non-volatile memory.
lation coefficient in signal processing, EVR data, etc. The adjust-
ing remote commander performs bi-directional communication
with the unit using the remote commander signal line (LANC).
The resultant data of this bi-directional communication is written
in the non-volatile memory.
1.
Used the Adjusting Remote Commander
1) Connect the adjusting remote commander to the CN706 on
the SY-66 board via CPC-9 jig (J-6082-393-C).
2) Adjust the HOLD switch of the adjusting remote commander
to “HOLD” (SERVICE position).
3) Turn on the power with the POWER switch of the unit.
If it has been properly connected, the LCD on the adjusting re-
mote commander will display as shown in Fig. 5-2-1.
If it has been properly connected, the LCD on the adjusting re-
mote commander will display as shown in Fig. 5-2-1.
Table 5-2-1
• Changing the address
The address increases when the FF (M) button is pressed,
and decreases when the REW (M) button is pressed. There
are altogether 256 addresses, from 00 to FF.
and decreases when the REW (M) button is pressed. There
are altogether 256 addresses, from 00 to FF.
• Changing the data (Data setting)
The data increases when the PLAY (N) button is pressed,
and decreases when the STOP (x) button is pressed. There
are altogether 256 data, from 00 to FF.
and decreases when the STOP (x) button is pressed. There
are altogether 256 data, from 00 to FF.
• Writing the adjustment data
The PAUSE button must be pressed to write the adjustment
data in the nonvolatile memory. (The new adjustment data
will not be recorded in the nonvolatile memory if this step is
not performed)
data in the nonvolatile memory. (The new adjustment data
will not be recorded in the nonvolatile memory if this step is
not performed)
2.
Precautions upon Using the Adjusting Remote
Commander
Commander
Mishandling of the adjusting remote commander may erase the
correct adjustment data at times. To prevent this, it is recommended
that all adjustment data be noted down before beginning adjust-
ments and new adjustment data after each adjustment.
correct adjustment data at times. To prevent this, it is recommended
that all adjustment data be noted down before beginning adjust-
ments and new adjustment data after each adjustment.
0 : 00 : 00
Page
Data Address
4) Operate the adjusting remote commander as follows.
• Changing the page
The page increases when the EDIT SEARCH + button is
pressed, and decreases when the EDIT SEARCH – button is
pressed. There are altogether 16 pages, from 0 to F.
pressed, and decreases when the EDIT SEARCH – button is
pressed. There are altogether 16 pages, from 0 to F.
Fig. 5-2-1
Hexadecimal
0 1 2 3 4 5 6 7 8 9 A B C D E F
notation
LCD Display
0 1 2 3 4 5 6 7 8 9 A b c d E F
Decimal notation
0 1 2 3 4 5 6 7 8 9 1011 12 1314 15
conversion value
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