Sony DCR-HC15 (serv.man3) Service Manual ▷ View online
6-31
DCR-HC15
1-5.
LCD SYSTEM ADJUSTMENT
Note1:
The back light (fluorescent tube) is driven by a high voltage AC
power supply. Therefore, do not touch the back light holder to
avoid electrical shock.
power supply. Therefore, do not touch the back light holder to
avoid electrical shock.
Note2:
When replacing the LCD unit, be careful to prevent damages
caused by static electricity.
caused by static electricity.
Note3:
Before performing the adjustments, check the data of page: 0,
address: 10 is “00”. If not, set data: 00 to this address.
address: 10 is “00”. If not, set data: 00 to this address.
Note4:
NTSC model : DCR-HC15
PAL model
PAL model
: DCR-HC14E/HC15E
Switch setting
LCD panel ...................................................................... Open
[Adjusting connector]
Most of the measuring points for adjusting the LCD system are
concentrated in CN1004 of the VC-311 board. Connect the
measuring instruments via the multi CPC-7 jig (J-6082-382-A). The
following table shows the Pin No. and signal name of CN1004.
concentrated in CN1004 of the VC-311 board. Connect the
measuring instruments via the multi CPC-7 jig (J-6082-382-A). The
following table shows the Pin No. and signal name of CN1004.
Table 6-1-11.
1. VCO Adjustment (PD-188 board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
be blurred.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 7 of CN1004 of VC-311 board
(H START)
(H START)
Measuring Instrument
Frequency counter
Adjustment Page
C
Adjustment Address
47, 48
Specified Value
f = 15734 ± 30Hz (NTSC)
f = 15625 ± 30Hz (PAL)
f = 15625 ± 30Hz (PAL)
Note1:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
47
Change the data and set the VCO
frequency (f) to the specified
value.
frequency (f) to the specified
value.
3
C
47
Press PAUSE button.
4
C
47
Read the data, and this data is
named D
named D
47
.
5
Convert D
47
to decimal notation,
and obtain D
47
’. (Note2)
6
Calculate D
48
’ using following
equations (Decimal calculation)
[NTSC model]
When D
[NTSC model]
When D
47
’ 229
D
48
’ = D
47
’ + 26
When D
47
’ > 229
D
48
’ = 255
[PAL model]
When D
When D
47
’ 26
D
48
’ = D
47
’ – 26
When D
47
’ < 26
D
48
’ = 0
7
Convert D
48
’ to a hexadecimal
number, and obtain D
48
. (Note2)
8
C
48
D
48
Set the data, and press PAUSE
button.
button.
9
0
01
00
Set the data.
Note2:
Refer to “Table 6-4-1. Hexadecimal-decimal Conversion Table”.
Pin No.
1
2
3
4
5
6
7
8
Signal Name
FRRV
RF MON
RF IN/LANC
JACK IN
JACK IN
SWP
PANEL COM
REG_GND
H START
REG_GND
Pin No.
9
10
11
12
13
14
15
16
Signal Name
PANEL VG
REG_GND
EVF VCO
REG_GND
EVF VG
EXT DA
LANC SIG
N.C.
Fig. 6-1-18.
CN1004
Remove the CPC lid
16
1
6-32
DCR-HC15
2. PSIG GRAY Adjustment (PD-188 board)
Set the PSIG signal level to an appropriate level.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 5 of CN1004 of VC-311 board
(PANEL COM)
(PANEL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
4C
Specified Value
A = 5.00 ± 0.10V
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
4C
Change the data and set the PSIG
signal level (A) to the specified
value. (The data should be “00”
to “7F”.)
signal level (A) to the specified
value. (The data should be “00”
to “7F”.)
3
C
4C
Press PAUSE button.
4
0
01
00
Set the data.
3. RGB AMP Adjustment (PD-188 board)
Set the D range of the RGB decoder used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 9 of CN1004 of VC-311 board
(PANEL VG)
(PANEL VG)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
4A
Specified Value
A = 7.58 ± 0.05V (NTSC)
A = 7.46 ± 0.05V (PAL)
A = 7.46 ± 0.05V (PAL)
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
4A
Change the data and set the
voltage (A) between the reversed
waveform pedestal and non-
reversed waveform pedestal to
the specified value.
voltage (A) between the reversed
waveform pedestal and non-
reversed waveform pedestal to
the specified value.
3
C
4A
Press PAUSE button.
4
0
01
00
Set the data.
Fig. 6-1-20.
Pedestal
Pedestal
A
2H
Fig. 6-1-19.
A
2H
6-33
DCR-HC15
4. Black Limit Adjustment (PD-188 board)
Set the video signal level for driving the LCD driver to an appropriate
level.
level.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 5 of CN1004 of VC-311 board
(PANEL COM)
(PANEL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
4B
Specified Value
A = 8.30 ± 0.08V
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
C4
61
Set the data.
3
3
C5
Set the following data.
5B (NTSC), 53 (PAL)
5B (NTSC), 53 (PAL)
4
C
4B
Change the data and set the PSIG
signal amplitude (A) to the
specified value. (The data
should
be “00” to “0F”)
signal amplitude (A) to the
specified value. (The data
should
be “00” to “0F”)
5
C
4B
Press PAUSE button.
6
3
C4
00
Set the data.
7
3
C5
00
Set the data.
8
0
01
00
Set the data.
9
Check that the specified value of
“RGB AMP Adjustment” is
satisfied. If not, perform “RGB
AMP Adjustment”.
“RGB AMP Adjustment” is
satisfied. If not, perform “RGB
AMP Adjustment”.
5. Contrast Adjustment (PD-188 board)
Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will be blackish or saturated
(whitish).
value. If deviated, the screen image will be blackish or saturated
(whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 9 of CN1004 of VC-311 board
(PANEL VG)
(PANEL VG)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
4F
Specified Value
A = 2.54 ± 0.05V (NTSC)
A = 2.58 ± 0.05V (PAL)
A = 2.58 ± 0.05V (PAL)
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
4F
Change the data and set the
voltage (A) between the 100 IRE
and 0 IRE (pedestal) to the
specified value. (The data should
be “00” to “7F”.)
voltage (A) between the 100 IRE
and 0 IRE (pedestal) to the
specified value. (The data should
be “00” to “7F”.)
3
C
4F
Press PAUSE button.
4
0
01
00
Set the data.
Fig. 6-1-21.
A
V
Fig. 6-1-22.
100 IRE
Pedestal
A
2H
6-34
DCR-HC15
6. Center Level Adjustment (PD-188 board)
Set the video signal center level of LCD panel to an appropriate
level.
level.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 9 of CN1004 of VC-311 board
(PANEL VG)
(PANEL VG)
Measuring Instrument
Digital voltmeter
Adjustment Page
C
Adjustment Address
50
Specified Value
A = 7.00 ± 0.03Vdc
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
50
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”.)
3
C
50
Press PAUSE button.
4
0
01
00
Set the data.
7. V COM Adjustment (PD-188 board)
Set the DC bias of the common electrode drive signal of LCD to the
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous vertical lines.
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous vertical lines.
Mode
VTR stop
Signal
No signal
Measurement Point
Check on LCD display
Measuring Instrument
Adjustment Page
C
Adjustment Address
49
Specified Value
The brightness difference between the
section A and section B is minimum.
section A and section B is minimum.
Note1:
This adjustment should be carried out upon completion of the
following adjustments.
following adjustments.
RGB AMP Adjustment
Black Limit Adjustment
Contrast Adjustment
Center Level Adjustment
Black Limit Adjustment
Contrast Adjustment
Center Level Adjustment
Note2:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
49
Change the data so that the
brightness of the section A and
that of the section B is equal.
(Note3)
brightness of the section A and
that of the section B is equal.
(Note3)
3
C
49
Subtract 2 from the data.(Note3)
4
C
49
Press PAUSE button.
5
0
01
00
Set the data.
Note3:
The data should be “00” to “3F”.
Fig. 6-1-23.
A
A
A
A
B
B
B
B
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