Sony DSC-P92 (serv.man4) Service Manual ▷ View online
6-31
DSC-P92
1-5.
LCD SYSTEM ADJUSTMENT
Note: When replacing the LCD unit, be careful to prevent damages caused
by static electricity.
SETUP setting:
LCD BRIGHTNESS (SETUP1) ............................ NORMAL
LCD BACKLIGHT (SETUP1) ................................ BRIGHT
VIDEO OUT (SETUP2) ............................................... NTSC
LCD BACKLIGHT (SETUP1) ................................ BRIGHT
VIDEO OUT (SETUP2) ............................................... NTSC
(Adjustments must be performed in NTSC mode, so don’t set the
setup setting to “PAL”.)
setup setting to “PAL”.)
[Measuring points]
The measuring points when using the oscilloscope or the digital
voltmeter are CL803 (Pin ws of IC801(VG)) and CL804 (Pin ws of
CN702) of SY-93 board.
The measuring points when using the oscilloscope or the digital
voltmeter are CL803 (Pin ws of IC801(VG)) and CL804 (Pin ws of
CN702) of SY-93 board.
Fig. 6-1-15.
1. LCD Initial Data Input (1)
Mode
PLAY (
)
Signal
Arbitrary
Adjustment Page
4F
Adjustment Address
80 to 8B, 92 to 95, A3, A4
Adjusting method:
1)
1)
Select page: 00, address: 01, and set data: 01.
2)
Select page: 4F, and write the data in the following table.
3)
Select page: 00, address: 01, and set data: 00.
Address
80
81
82
83
84
85
86
87
88
89
8A
8B
92
93
94
95
A3
A4
Remark
FixeFixed data
Fixed data
VCO adj.
VCO adj.
V COM adj.
Bright adj.
Fixed data
P sig level adj.
White balance adj.
White balance adj.
Contrast adj.
VG center adj.
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
4E
FF
80
90
21
BD
08
3B
8E
77
39
36
29
07
1F
1F
28
00
Data
COVER
COVER
1
13
36 25
48
12
37
24
IC801
2
38
1 37
CN702
CL803
SY-93 board
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DSC-P92
2. LCD Initial Data Input (2)
Mode
PLAY (
)
Signal
Arbitrary
Adjustment Page
5F
Adjustment Address
3A to 3F
Adjusting method:
1)
1)
Select page: 00, address: 01, and set data: 01.
2)
Select page: 5F, and write the data in the following table.
3)
Select page: 00, address: 01, and set data: 00.
3. VCO Adjustment (SY-93 board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode
PLAY (
)
Subject
Arbitrary
Measurement Point
Check on LCD display
Measuring Instrument
Adjustment Page
4F
Adjustment Address
82, 83
Adjusting method:
Order Page Address Data
Procedure
1
00
01
01
Set the data.
2
40
F1
09
Write the data.
3
4F
02
03
Write the data.
4
4F
82
80
Write the data.
5
4F
82
Increase the data, and stop it
when the LCD screen just begins
to fall into the disorder.
when the LCD screen just begins
to fall into the disorder.
6
4F
82
Read the data, and this data is
named D
named D
H
.
7
4F
82
80
Write the data.
8
4F
82
Decrease the data, and stop it
when the LCD screen just begins
to fall into the disorder.
when the LCD screen just begins
to fall into the disorder.
9
4F
82
Read the data, and this data is
named D
named D
L
.
10
Calculate D
82
using following
equation.
(Hexadecimal calculation.)
D
(Hexadecimal calculation.)
D
82
= (D
H
+ D
L
)/2
11
4F
82
D
82
Write the data.
12
Calculate D
83
using following
equation.
(Hexadecimal calculation.)
D
(Hexadecimal calculation.)
D
83
= D
82
+ 16
13
4F
83
D
83
Write the data.
14
4F
02
00
Write the data.
15
40
F1
00
Write the data.
16
00
01
00
Set the data.
Address
3A
3B
3C
3D
3E
3F
Remark
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
Fixed data
57
FE
02
5A
00
01
Data
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DSC-P92
4. VG Center Adjustment (SY-93 board)
Set the VG signal center level of LCD panel to an appropriate level.
Set the VG signal center level of LCD panel to an appropriate level.
Note: Do either of “Adjustment without Using Digital Voltmeter” or
“Adjustment Using Digital Voltmeter”.
4-1. Adjustment without Using Digital Voltmeter
Mode
PLAY (
)
Signal
Arbitrary
Measurement Point
Data of page: 40, address: 11, 12
Measuring Instrument
Adjustment Page
4F
Adjustment Address
8B
Specified Value
205 to 20D
Adjusting method:
Order Page Address Data
Procedure
1
00
01
01
Set the data.
2
40
F1
01
Write the data.
3
4F
02
03
Write the data.
4
40
10
00
Write the data.
5
40
10
90
Write the data.
6
40
11
Read the data, and this data is
named D
named D
11A
.
7
40
12
Read the data, and this data is
named D
named D
12A
.
8
40
10
91
Write the data.
9
40
11
Read the data, and this data is
named D
named D
11B
.
10
40
12
Read the data, and this data is
named D
named D
12B
.
11
Calculate D
A
and D
B
using
following equation.
(Hexadecimal calculation.)
(Note1)
D
(Hexadecimal calculation.)
(Note1)
D
A
= (D
11A
×
4+ D
12A
/ 40)
D
B
= (D
11B
×
4+ D
12B
/ 40)
12
Calculate the signal level using
following equation.
(Hexadecimal calculation.)
Signal level = (D
following equation.
(Hexadecimal calculation.)
Signal level = (D
A
+ D
B
) / 2
13
When the signal level satisfies
the specified value proceed to
step 16, in case of others
proceed to step 14.
the specified value proceed to
step 16, in case of others
proceed to step 14.
14
4F
8B
Change the data. (Note2)
(The data should be “00” to
“7F”.)
(The data should be “00” to
“7F”.)
15
4F
8B
Write the data, and return to step
4.
4.
16
4F
02
00
write the data.
17
40
F1
00
Write the data.
18
00
01
00
Set the data.
Note1: When dividing D
12A
or D
12B
by 40. If there is a fraction below
decimal point, truncate it.
Note2: When the signal level is smaller than specified value, increase the
data.
4-2. Adjustment Using Digital Voltmeter
Mode
PLAY (
)
Signal
Arbitrary
Measurement Point
CL803 (Pin ws of IC801) (VG)
Measuring Instrument
Digital voltmeter
Adjustment Page
4F
Adjustment Address
8B
Specified Value
A = 7.00
±
0.05V
Adjusting method:
Order Page Address Data
Procedure
1
00
01
01
Set the data.
2
40
F1
01
Write the data.
3
4F
02
03
Write the data.
4
4F
8B
Change the data and set the DC
voltage (A) to the specified value.
(The data should be “00” to “7F”.)
voltage (A) to the specified value.
(The data should be “00” to “7F”.)
5
4F
8B
Write the data.
6
4F
02
00
Write the data.
7
40
F1
00
Write the data.
8
00
01
00
Set the data.
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DSC-P92
A
2H
5. PSIG Level Adjustment (SY-93 board)
Set the PSIG signal level to an appropriate level.
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
PLAY (
)
Signal
Arbitrary
Measurement Point
Data of page: 40, address: 11, 12
Measuring Instrument
Adjustment Page
4F
Adjustment Address
87
Specified Value
170 to 178
Adjusting method:
Order Page Address Data
Procedure
1
00
01
01
Set the data.
2
40
F1
02
Write the data.
3
4F
02
03
Write the data.
4
40
10
00
Write the data.
5
40
10
80
Write the data.
6
40
11
Read the data, and this data is
named D
named D
11A
.
7
40
12
Read the data, and this data is
named D
named D
12A
.
8
40
10
81
Write the data.
9
40
11
Read the data, and this data is
named D
named D
11B
.
10
40
12
Read the data, and this data is
named D
named D
12B
.
11
Calculate D
A
and D
B
using
following equation.
(Hexadecimal calculation.)
(Note1)
(Hexadecimal calculation.)
(Note1)
D
A
= (D
11A
×
4+ D
12A
/ 40)
D
B
= (D
11B
×
4+ D
12B
/ 40)
12
Calculate the signal level using
following equation.
(Hexadecimal calculation.)
When D
following equation.
(Hexadecimal calculation.)
When D
A
D
B
Signal level = D
A
– D
B
When D
A
< D
B
Signal level = D
B
– D
A
13
When the signal level satisfies the
specified value proceed to step 16,
in case of others proceed to step
14.
specified value proceed to step 16,
in case of others proceed to step
14.
14
4F
87
Change the data. (Note2)
15
4F
87
Write the data, and return to step
4.
4.
16
4F
02
00
Write the data.
17
40
F1
00
Write the data.
18
00
01
00
Set the data.
Note1: When dividing D
12A
or D
12B
by 40. If there is a fraction below
decimal point, truncate it.
Note2: When the signal level is smaller than specified value, increase the
data. (The data should be “00” to “7F”.)
5-2. Adjustment Using Oscilloscope
Mode
PLAY (
)
Signal
Arbitrary
Measurement Point
CL804 (Pin ws of CN702) (VCOM)
Measuring Instrument
Oscilloscope
Adjustment Page
4F
Adjustment Address
87
Specified Value
A = 5.00
±
0.05V
Adjusting method:
Order Page Address Data
Procedure
1
00
01
01
Set the data.
2
40
F1
02
Write the data.
3
4F
02
03
Write the data.
4
4F
87
Change the data and set the
signal level (A) to the specified
value. (Note)
signal level (A) to the specified
value. (Note)
5
4F
87
Write the data.
6
4F
02
00
Write the data.
7
40
F1
00
Write the data.
8
00
01
00
Set the data.
Note: The data should be “00” to “7F”.
Fig. 6-1-16.
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