Sony DCR-DVD301 (serv.man4) Service Manual ▷ View online
6-39
DCR-DVD301
2-2.
VIDEO SYSTEM ADJUSTMENTS
Note1: efore perform the video system adjustments, check that the
specified value of “66MHz Origin Oscillation Adjustment” of
“CAMERA SYSTEM ADJUSTMENT” is satisfied.
And check that the data of page: 0, address: 10 is “00”. If not, set
data: 00 to this address.
“CAMERA SYSTEM ADJUSTMENT” is satisfied.
And check that the data of page: 0, address: 10 is “00”. If not, set
data: 00 to this address.
1. S VIDEO OUT Y Level Adjustment (VC-354 Board)
Mode
MOVIE (
)
Subject
Arbitrary
Measurement Point
Y signal terminal of S VIDEO jack
(75
(75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
B
Adjustment Address
D1
Specified Value
A = 1000
±
14mV
Note: The data of page: 0, address: 10 must be “00”.
Switch setting:
DEMO MODE (Menu setting) ........................................ OFF
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
00
00
Set the data.
3
3
0C
03
Set the data, and press PAUSE
button.
button.
4
B
D1
Change the data and set the Y
signal level (A) to the specified
value.
signal level (A) to the specified
value.
5
B
D1
Press PAUSE button.
6
3
0C
00
Set the data, and press PAUSE
button.
button.
7
0
01
00
Set the data.
2. S VIDEO OUT Chroma Level Adjustment (VC-354 Board)
Mode
MOVIE (
)
Subject
Arbitrary
Measurement Point
Chroma signal terminal of S VIDEO
jack (75
jack (75
Ω
terminated)
External trigger: Y signal terminal of
S VIDEO jack
S VIDEO jack
Measuring Instrument
Oscilloscope
Adjustment Page
B
Adjustment Address
D2, D3
Specified Value
Cr level
: A = 714
±
14mV
Cb level
: B = 714
±
14mV
Burst level : C = 286
±
6mV
Note: The data of page: 0, address: 10 must be “00”.
Switch setting:
DEMO MODE (Menu setting) ........................................ OFF
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
00
00
Set the data.
3
3
0C
03
Set the data, and press PAUSE
button.
button.
4
B
D2
Change the data and set the Cr
signal level (A) to the specified
value.
signal level (A) to the specified
value.
5
B
D2
Press PAUSE button.
6
B
D3
Change the data and set the Cb
signal level (B) to the specified
value.
signal level (B) to the specified
value.
7
B
D3
Press PAUSE button.
8
3
0C
00
Set the data, and press PAUSE
button.
button.
9
Check that the burst signal level
(C) is satisfied the specified value.
(C) is satisfied the specified value.
10
0
01
00
Set the data.
Fig. 6-2-3.
Fig. 6-2-4.
H
A
H
C
A
0.28
µ
sec
B
0.28
µ
sec
6-40
DCR-DVD301
3. VIDEO OUT Y, Chroma Level Check (VC-354 Board)
Mode
MOVIE (
)
Subject
Arbitrary
Measurement Point
Video terminal of AUDIO VIDEO
jack (75
jack (75
Ω
terminated)
Measuring Instrument
Oscilloscope
Specified Value
Sync level : A = 286
±
18mV
Burst level : B = 286
±
18mV
Note: The data of page: 0, address: 10 must be “00”.
Switch setting:
DEMO MODE (Menu setting) ........................................ OFF
Adjusting method:
Order Page Address Data
Procedure
1
3
00
00
Set the data.
2
3
0C
03
Set the data, and press PAUSE
button.
button.
3
Check that the sync signal level
(A) satisfies the specified value.
(A) satisfies the specified value.
4
Check that the burst signal level
(B) satisfies the specified value.
(B) satisfies the specified value.
5
3
0C
00
Set the data, and press PAUSE
button.
button.
Fig. 6-2-5.
H
B
A
6-41
DCR-DVD301
2-3.
AUDIO SYSTEM ADJUSTMENTS
Switch setting:
REC MODE (DISC SET of Menu setting) ........................ LP
Note: Reset to SP, after completing adjustments.
Type of disc to use:
DVD-RW (VF format)
DVD-RW (VF format)
[Connection of Audio System Measuring Devices]
Connect the audio system measuring devices as shown in Fig. 6-2-6.
Connect the audio system measuring devices as shown in Fig. 6-2-6.
Note: In recording mode, input a color bar signal to the video input.
1. Overall Level Characteristics Check
Mode
PLAY (
) mode
Recording and playback
Signal
400Hz, -7.5dBs signal:
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
Measurement Point
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
AUDIO/VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
-7.5
±
1.0dBs
Checking Method
1)
1)
Input the 400Hz, -7.5dBs signal in the AUDIO L and AUDIO
R terminal.
R terminal.
2)
Record the signal.
3)
Playback the recorded section.
4)
Check that the 400Hz signal level is the specified value.
2. Overall Distortion Check
Mode
PLAY (
) mode
Recording and playback
Signal
400Hz, -7.5dBs signal:
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
Measurement Point
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
AUDIO/VIDEO jack
Measuring Instrument
Audio distortion meter
Specified Value
Below 0.4% (200Hz to 6kHz BPF ON)
Checking Method
1)
1)
Input the 400Hz, -7.5dBs signal in the AUDIO L and AUDIO
R terminal.
R terminal.
2)
Record the signal.
3)
Playback the recorded section.
4)
Check that the distortion is the specified value.
3. Overall Noise Level Check
Mode
PLAY (
) mode
Recording and playback
Signal
No signal:
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
Measurement Point
AUDIO L and AUDIO R terminal of
AUDIO/VIDEO jack
AUDIO/VIDEO jack
Measuring Instrument
Audio level meter
Specified Value
Below -45dBs
(IHF-A filter ON, 20kHz LPF ON)
(IHF-A filter ON, 20kHz LPF ON)
Checking Method
1)
1)
Insert shorting plugs in each of AUDIO L and AUDIO R
terminal.
terminal.
2)
Record the signal.
3)
Remove the shorting plugs.
4)
Playback the recorded section.
5)
Check that the noise level is the specified value.
Fig. 6-2-6.
[How to record the line input signal]
1)
1)
Set the mode dial to PLAY/EDIT (
).
2)
Press the VISUAL INDEX button so that the line input video
signal is displayed on the LCD screen
signal is displayed on the LCD screen
3)
Press the REC buttons.
Recording
Audio oscillator
Attenuator
600
Ω
Main unit
600
Ω
: 270
Ω
(1-249-410-11) + 330
Ω
(1-249-411-11)
Main unit
Left (White)
Right
47k
Ω
47k
Ω
Video (Yellow)
TV monitor
Audio level meter
or Distortion meter
47k
Ω
(1-249-437-11)
Playback
AUDIO/VIDEO
(Red)
Video
(Yellow)
(Yellow)
Left
(White)
(White)
Right
(Red)
(Red)
Pattern generator
Video output
(75
(75
Ω
)
AUDIO/VIDEO
6-42
DCR-DVD301
6-3. SERVICE MODE
3-1.
ADJUSTMENT REMOTE COMMANDER
The adjustment remote commander is used for changing the
calculation coefficient in signal processing, EVR data, etc. The
adjustment 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.
calculation coefficient in signal processing, EVR data, etc. The
adjustment 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. Using the adjustment remote commander
1)
1)
Connect the adjustment remote commander to the LANC
terminal.
terminal.
2)
Set the HOLD switch of the adjustment remote commander to
“HOLD” (SERVICE position). If it has been properly
connected, the LCD on the adjustment remote commander will
display as shown in Fig. 6-3-1.
“HOLD” (SERVICE position). If it has been properly
connected, the LCD on the adjustment remote commander will
display as shown in Fig. 6-3-1.
Fig. 6-3-1
3)
Operate the adjustment remote commander as follows.
• Changing the page
• Changing the page
The page increases when the EDIT SEARCH+ button is pressed,
and decreases when the EDIT SEARCH– button is pressed.
Pages to use for the adjustment are 17 pages of 0 to 3, 6 to 7, A
to F, 14, 19, 1B, 1E and 1F. (Note)
and decreases when the EDIT SEARCH– button is pressed.
Pages to use for the adjustment are 17 pages of 0 to 3, 6 to 7, A
to F, 14, 19, 1B, 1E and 1F. (Note)
• 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 (A, B, C, D, E, F, 14, 19, 1B, 1E, 1F page) in the
nonvolatile memory. (The new adjusting data will not be
recorded in the nonvolatile memory if this step is not
performed.)
data (A, B, C, D, E, F, 14, 19, 1B, 1E, 1F page) in the
nonvolatile memory. (The new adjusting data will not be
recorded in the nonvolatile memory if this step is not
performed.)
4)
After completing all adjustments, turn off the main power
supply once.
supply once.
Note: When reading or writing the 14, 19, 1B, 1E, 1F page data, select
page: 0, address: 10, and set data: 01, then select 4, 9, B, E or F
page. The 14, 19, 1B, 1E or 1F page can be chosen by this data
setting.
After reading or writing, reset the data of page: 0, address: 10
to “00”.
page. The 14, 19, 1B, 1E or 1F page can be chosen by this data
setting.
After reading or writing, reset the data of page: 0, address: 10
to “00”.
Hexadecimal
notation
notation
LCD Display
Decimal notation
conversion value
conversion value
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 1 2 3 4 5 6 7 8 9 A b c d E F
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
2. Precautions upon using
the adjustment remote commander
Mishandling of the adjustment 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 adjustments
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 adjustments
and new adjustment data after each adjustment.
Page
Data
Address
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