Sony CCD-TRV138 (serv.man2) Service Manual ▷ View online
6-31
CCD-TRV138/TRV238E/TRV338/TRV438E
3. LINE OUT Level Adjustment (VC-341 Board)
Mode
VTR stop (PLAY/EDIT mode)
Signal
No signal
Measurement Point
Video terminal of A/V OUT jack
(75
(75
Ω terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
1A, 1B
Specified value
Sync level:
A = 286
± 5 mVp-p (NTSC)
A = 300
± 5 mVp-p (PAL)
Burst level:
B = 286
± 5 mVp-p (NTSC)
B = 300
± 5 mVp-p (PAL)
Note:
Check that the data of page: 0, address: 10 is “00”.
Adjustment method:
Order Page Address Data
Procedure
1
0
01
01
2
D
10
02
Press PAUSE button.
3
C
1A
Change the data and set the
SYNC level (A) to the
specified value.
SYNC level (A) to the
specified value.
4
C
1A
Press PAUSE button.
5
C
1B
Change the data and set the
burst level (B) to the specified
value.
burst level (B) to the specified
value.
6
C
1B
Press PAUSE button.
7
D
10
00
Press PAUSE button.
Fig. 6-3-5
H
B
A
6-32
CCD-TRV138/TRV238E/TRV338/TRV438E
4. 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. 6-3-6
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).
6-33
CCD-TRV138/TRV238E/TRV338/TRV438E
5. REC C/AFM Current Adjustment
5-1. Preparations
Note 1:
Note 1:
Check that the data of page: 0, address: 10 is “00”.
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
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.
5-2. REC C Current Check (VC-341 Board)
Check the recording current level of the REC chroma signal.
If it is too low, chroma signal noise in playback picture will be
increased. If too high, Y signal noises will increase and white
modulation noises will be produced.
If it is too low, chroma signal noise in playback picture will be
increased. If too high, Y signal noises will increase and white
modulation noises will be produced.
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)
Specified value
A = 50.8
± 3.0 mVp-p (NTSC)
A = 54.0
± 3.0 mVp-p (PAL)
Note 1:
Check that the data of page: 0, address: 10 is “00”.
Checking method:
Order Page Address Data
Procedure
1
Close the cassette compartment
without inserting cassette.
without inserting cassette.
2
Set to the VTR recording
mode. (Note 2)
mode. (Note 2)
3
0
01
01
4
3
91
30
5
3
92
20
6
C
25
Note down the data.
7
C
25
00
Press PAUSE button.
8
3
01
41
Press PAUSE button.
9
Check that the REC chroma
signal level (A) satisfies the
specified value, and note
down the signal level.
signal level (A) satisfies the
specified value, and note
down the signal level.
10
3
01
00
Press PAUSE button.
11
C
25
Set data noted down at step 6,
and press PAUSE button.
and press PAUSE button.
12
3
91
00
13
3
92
00
14
0
01
00
15
Perform “REC AFM Current
Adjustment” and “Processing
after Completed Adjustment”.
Adjustment” and “Processing
after Completed Adjustment”.
Note 2:
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).
Fig. 6-3-7
A
1.35
µ
sec
Center of the luminance line width
6-34
CCD-TRV138/TRV238E/TRV338/TRV438E
5-4. Processing after Completed Adjustment
Note:
Note:
Check that the data of page: 0, address: 10 is “00”.
Order Page Address Data
Procedure
1
Set to the VTR stop mode.
2
0
01
01
3
A
1A
Set data noted down at step 7
of “7-1. Preparations”, and
press PAUSE button.
of “7-1. Preparations”, and
press PAUSE button.
4
7
10
E2
Press PAUSE button.
5
A
10
00
Press PAUSE button.
6
C
14
00
Press PAUSE button.
7
0
01
00
5-3. REC AFM Current Adjustment (VC-341 Board)
Check the recording current level of the REC AFM signal.
If it is too low, the audio S/N will be deteriorated. If too high,
color beets will be produced on self recording/playback image.
If it is too low, the audio S/N will be deteriorated. If too high,
color beets will be produced on self recording/playback image.
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
25
Specified value
NTSC model
A = (REC chroma signal level)
A = (REC chroma signal level)
× 0.292
± 0.9 mVp-p (Note 1)
PAL model
A = (REC chroma signal level)
A = (REC chroma signal level)
× 0.309
± 0.9 mVp-p (Note 1)
Note 1:
Check that the data of page: 0, address: 10 is “00”.
Note 2:
REC chroma signal level is noted down at step 9 of “REC
C Current Check”
C Current Check”
Adjusting method:
Order Page Address Data
Procedure
1
Close the cassette compartment
without inserting cassette.
without inserting cassette.
2
Set to the VTR recording
mode. (Note 3)
mode. (Note 3)
3
0
01
01
4
3
92
20
5
3
01
41
Press PAUSE button.
6
C
25
Change the data and set the
REC AFM signal level (A) to
the specified value.
REC AFM signal level (A) to
the specified value.
7
C
25
Press PAUSE button.
8
3
01
00
Press PAUSE button.
9
3
92
00
10
0
01
00
11
Perform “Processing after
Completed Adjustment”.
Completed Adjustment”.
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).
Fig. 6-3-8
A
0.67
µ
sec
Center of the luminance line width
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