Sony CCD-TRV128 / CCD-TRV228 / CCD-TRV228E / CCD-TRV328 / CCD-TRV428 / CCD-TRV428E (serv.man2) Service Manual ▷ View online
CCD-TRV128/TRV228/TRV228E/TRV328/TRV428/TRV428E
6-31
3-4.
VIDEO SYSTEM ADJUSTMENTS
Before perform the video system adjustments, check that the data
of page: 0, address: 10 is “00”.
If not, select page: 0, address: 10, and set the data “00”.
Video system adjustments must be performed in the following or-
der.
of page: 0, address: 10 is “00”.
If not, select page: 0, address: 10, and set the data “00”.
Video system adjustments must be performed in the following or-
der.
Adjusting Procedure:
1. 28 MHz origin oscillation adjustment
2. AFC f
1. 28 MHz origin oscillation adjustment
2. AFC f
0
adjustment
3. S VIDEO OUT Y level adjustment
4. S VIDEO OUT C level adjustment
5. VIDEO OUT level check
6. REC Y current adjustment
7. REC C/AFM current adjustment
4. S VIDEO OUT C level adjustment
5. VIDEO OUT level check
6. REC Y current adjustment
7. REC C/AFM current adjustment
1. 28 MHz Origin Oscillation Adjustment
(VC-341 board)
Set the frequency of the clock for synchronization.
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
VTR stop (PLAY/EDIT mode)
Signal
No signal
Measurement Point
Pin qa of IC151
Measuring Instrument
Frequency counter
Adjustment Page
F
Adjustment Address
10
Specified value
f = 14318181
± 68 Hz (NTSC model)
f = 14187500
± 54 Hz (PAL model)
Note 1:
Check that the data of page: 0, address: 10 is “00”.
Note 2:
Refer to “2. DISASSEMBLY”, when opening the VC-
341 board.
341 board.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
F
10
Change the data and set the
frequency (f) to the specified
value.
frequency (f) to the specified
value.
3
F
10
Press PAUSE button.
4
0
01
00
Fig. 6-3-4
2. AFC f
0
Adjustment (VC-341 board)
RadarW
RadarW
RadarW
Adjust the pull-in range of A/D converted clock generator during
playback.
playback.
Mode
VTR stop (PLAY/EDIT mode)
Signal
No signal
Measurement Point
Displayed data of page: 3, address: 03
Measuring Instrument
Adjusting remote commander
Adjustment Page
C
Adjustment Address
19
Specified value
The data of page: 3, address: 03 is “00”
Note 1:
Check that the data of page: 0, address: 10 is “00”.
Adjusting method:
Order Page Address Data
Procedure
1
Close the cassette compartment
without inserting cassette.
without inserting cassette.
2
0
01
01
3
3
01
82
Press PAUSE button.
4
3
02
Check the data changes to
“00”.
“00”.
5
3
03
Check that the data is “00”.
(Note 2)
(Note 2)
6
0
01
00
Note 2:
If the data is other than“00”, adjustment has errors.
IC151
13
12 11 1
36
25
24
48
37
Measurement
Point
Point
VC-341 BOARD (SIDE B)
CCD-TRV128/TRV228/TRV228E/TRV328/TRV428/TRV428E
6-32
4. S VIDEO OUT C Level Adjustment (VC-341 board)
Mode
VTR stop (PLAY/EDIT mode)
Signal
No signal
Measurement Point
Chroma signal terminal of
S VIDEO jack (75
S VIDEO jack (75
Ω terminated)
External trigger: Y signal terminal of
S VIDEO jack (75
S VIDEO jack (75
Ω terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
1B
Specified value
A = 286
± 5 mVp-p (NTSC model)
A = 300
± 5 mVp-p (PAL model)
Note:
Check that the data of page: 0, address: 10 is “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
C
1B
Change the data and set the
burst level (A) to the specified
value.
burst level (A) to the specified
value.
3
C
1B
Press PAUSE button.
4
0
01
00
3. S VIDEO OUT Y Level Adjustment (VC-341 board)
Mode
VTR stop (PLAY/EDIT mode)
Signal
No signal
Measurement Point
Y signal terminal of S VIDEO jack
(75
(75
Ω terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
1A
Specified value
A = 286
± 5 mVp-p (NTSC model)
A = 300
± 5 mVp-p (PAL model)
Note:
Check that the data of page: 0, address: 10 is “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
C
1A
Change the data and set the
SYNC level (A) to the
specified value.
SYNC level (A) to the
specified value.
3
C
1A
Press PAUSE button.
4
0
01
00
Fig. 6-3-5
Fig. 6-3-6
H
A
H
A
CCD-TRV128/TRV228/TRV228E/TRV328/TRV428/TRV428E
6-33
5. VIDEO OUT Level Check (VC-341 board)
Mode
VTR stop (PLAY/EDIT mode)
Signal
No signal
Measurement Point
Video terminal of A/V jack
(75
(75
Ω terminated)
Measuring Instrument
Oscilloscope
Specified value
Sync level:
A = 286
± 20 mVp-p (NTSC)
A = 300
± 20 mVp-p (PAL)
Burst level:
B = 286
± 20 mVp-p (NTSC)
B = 300
± 20 mVp-p (PAL)
Checking method:
Order Page Address Data
Procedure
1
Check that the SYNC level
(A) satisfies the specified
value.
(A) satisfies the specified
value.
2
Check that the burst level (B)
satisfies the specified value.
satisfies the specified value.
Fig. 6-3-7
H
B
A
CCD-TRV128/TRV228/TRV228E/TRV328/TRV428/TRV428E
6-34
6. REC Y Current Adjustment (VC-341 board)
Adjust the Y FM signal recording current.
Mode
VTR recording (PLAY/EDIT mode)
Signal
No signal
Measurement Point
REC RF (Pin 7 of CN007)
Measuring Instrument
Oscilloscope
(20 MHz BW LIMIT: OFF)
(20 MHz BW LIMIT: OFF)
Adjustment Page
C
Adjustment Address
1E, 1F
Specified value
A = 235
± 5 mVp-p (NTSC)
A = 280
± 5 mVp-p (PAL)
Note 1:
Check that the data of page: 0, address: 10 is “00”.
Note 2:
Don’t disconnect the DC power supply of camcoder dur-
ing the following adjustments.
When the following symptom occurs, reset the data of A
page to the values note down.
1) The power is shut off so that unit can not operate.
ing the following adjustments.
When the following symptom occurs, reset the data of A
page to the values note down.
1) The power is shut off so that unit can not operate.
Fig. 6-3-8
A
0.18
µ
sec
Adjusting method:
Order Page Address Data
Procedure
1
Close the cassette compartment
without inserting cassette.
without inserting cassette.
2
Set to the VTR stop mode.
3
0
01
01
4
C
14
01
Press PAUSE button.
5
A
10
10
Press PAUSE button.
6
7
10
02
Press PAUSE button.
7
A
1A
Note down the data.
8
A
1A
Set the following data, and
press PAUSE button.
06: NTSC model
26: PAL model
press PAUSE button.
06: NTSC model
26: PAL model
9
Set to the VTR recording
mode. (Note 3)
mode. (Note 3)
10
3
92
10
11
3
01
41
Press PAUSE button.
12
C
1F
Change the data and set the
REC Y signal level (A) to the
specified value.
REC Y signal level (A) to the
specified value.
13
C
1F
Press PAUSE button.
14
C
1F
Read the data, and this data is
named D
named D
1F
.
15
C
1E
D
1F
Press PAUSE button.
16
3
01
00
Press PAUSE button.
17
3
92
00
18
Set to the VTR stop mode.
19
A
1A
Set data noted down at step 7,
and press PAUSE button.
and press PAUSE button.
20
7
10
E2
Press PAUSE button.
21
A
10
00
Press PAUSE button.
22
C
14
00
Press PAUSE button.
23
0
01
00
Note 3:
Use the REC buttons of the adjustment remote com-
mander (with HOLD switch set in the OFF position).
mander (with HOLD switch set in the OFF position).
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