Sony DCR-TRV140 Service Manual ▷ View online
5-46
DCR-TRV140
3-4.
VIDEO SYSTEM ADJUSTMENTS
Adjusting Procedure:
1. 27 MHz origin oscillation adjustment
2. S VIDEO OUT Y Level Adjustment
3. S VIDEO OUT chroma level adjustment
4. VIDEO OUT Y, chroma level check
1. 27 MHz origin oscillation adjustment
2. S VIDEO OUT Y Level Adjustment
3. S VIDEO OUT chroma level adjustment
4. VIDEO OUT Y, chroma level check
1. 27 MHz Origin Oscillation Adjustment
(VC-273 board)
(VC-273 board)
Set the oscillation frequency of X1501.
If deviated, the synchronization will be disrupted and the color
will become inconsistent.
If deviated, the synchronization will be disrupted and the color
will become inconsistent.
Mode
CAMERA
Subject
Arbitrary
Measurement Point
Pin qh of IC1502
Measuring Instrument
Frequency counter
Adjustment Page
F
Adjustment Address
4D
Specified Value
f=13500000
±
68 Hz
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
F
4D
Change the data and set the
clock frequency (f) to the
specified value.
clock frequency (f) to the
specified value.
3
F
4D
Press PAUSE button.
4
0
01
00
VC-273 BOARD
2. S VIDEO OUT Y Level Adjustment (VC-273 board)
Mode
CAMERA
Subject
Arbitrary
Measurement Point
Y signal terminal of S VIDEO OUT
jack (75
jack (75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
25
Specified Value
A = 1000
±
20 mV
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
D
10
01
Press PAUSE button.
3
3
0C
02
Press PAUSE button.
4
C
25
Change the data and set the
voltage (A) to the specified
value.
voltage (A) to the specified
value.
5
C
25
Press PAUSE button.
6
3
0C
00
Press PAUSE button.
7
D
10
00
Press PAUSE button.
8
0
01
00
A: Y signal level
Fig. 5-3-7
H
A
16
IC1502
Fig. 5-3-6
5-47
DCR-TRV140
3. S VIDEO OUT Chroma Level Adjustment
(VC-273 board)
Mode
CAMERA
Subject
Arbitrary
Measurement Point
Chroma signal terminal of S VIDEO
OUT jack (75
OUT jack (75
Ω
terminated)
External trigger: Y signal terminal of
S VIDEO jack
S VIDEO jack
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
26, 27
Specified Value
Cr level: A=714
±
15 mV (NTSC)
A=700
±
15 mV (PAL)
Cb level: B=714
±
15 mV (NTSC)
B=700
±
15 mV (PAL)
Burst level: C=286
±
6 mV (NTSC)
C=300
±
6 mV (PAL)
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
D
10
01
Press PAUSE button.
3
3
0C
02
Press PAUSE button.
4
C
26
Change the data and set the
voltage (A) to the specified
value.
voltage (A) to the specified
value.
5
C
26
Press PAUSE button.
6
C
27
Change the data and set the
voltage (B) to the specified
value.
voltage (B) to the specified
value.
7
C
27
Press PAUSE button.
8
Check the voltage (C) to the
specified value.
specified value.
9
3
0C
00
Press PAUSE button.
10
D
10
00
Press PAUSE button.
11
0
01
00
A: Cr signal level
B: Cb signal level
C: Burst signal level
B: Cb signal level
C: Burst signal level
Fig. 5-3-8
H
C
A
0.28
µ
sec (NTSC)
0.23
µ
sec (PAL)
B
0.28
µ
sec (NTSC)
0.23
µ
sec (PAL)
5-48
DCR-TRV140
4. VIDEO OUT Y, Chroma Level Check (VC-273 board)
Mode
CAMERA
Subject
Arbitrary
Measurement Point
VIDEO terminal of A/V OUT jack
(75
(75
Ω
terminated)
Measuring Instrument
Oscilloscope
Specified Value
Sync level: A=286
±
20 mV (NTSC)
A=300
±
20 mV (PAL)
Burst level: B=286
±
20 mV (NTSC)
B=300
±
20 mV (PAL)
Checking method:
Order Page Address Data
Procedure
1
0
01
01
2
D
10
01
Press PAUSE button.
3
3
0C
02
Press PAUSE button.
4
Check the voltage (A) to the
specified value.
specified value.
5
Check the voltage (B) to the
specified value.
specified value.
6
3
0C
00
Press PAUSE button.
7
D
10
00
Press PAUSE button.
8
0
01
00
A: Sync signal level
B: Burst signal level
B: Burst signal level
Fig. 5-3-9
H
B
A
5-49
DCR-TRV140
1. Digital8 Playback Level Check
Mode
VTR playback
Signal
Digital8 alignment tape:
For audio operation check
(WR5-3ND (NTSC))
(WR5-3CD (PAL))
(WR5-3ND (NTSC))
(WR5-3CD (PAL))
Measurement Point
Audio left or right terminal of A/V
OUT jack
OUT jack
Measuring Instrument
Audio level meter and frequency
counter
counter
Specified Value
32 kHz mode: 1 kHz, + 3.0
±
2.0 dBs
48 kHz mode: 1 kHz, + 3.0
±
2.0 dBs
44.1 kHz mode:
The 7.35 kHz signal level during EMP
OFF is +2.0
The 7.35 kHz signal level during EMP
OFF is +2.0
±
2.0 dBs.
The 7.35 kHz signal level during EMP
ON is –6
ON is –6
±
2 dB from the signal level
during EMP OFF.
Checking Method:
1) Check that the playback signal level is the specified value.
1) Check that the playback signal level is the specified value.
3-5.
AUDIO SYSTEM ADJUSTMENTS
[Connecting the measuring instruments for the audio]
Connect the audio system measuring instruments in addition to
the video system measuring instruments as shown in Fig. 5-3-14.
the video system measuring instruments as shown in Fig. 5-3-14.
Fig. 5-3-10
Main unit
47 k
Ω
47 k
Ω
: 1-249-437-11
Audio level meter
TV monitor
A/V OUT
jack
Video
Audio (L)
Audio (R)
In Playback
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