Sony GV-D200 Service Manual ▷ View online
5-23
5. PLL fo & LPF fo Final Adjustment (VC-250 Board)
Mode
VTR stop
Signal
Arbitrary
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
1F, 20, 22, 29
Specified Value
Bit2, bit3 and bit6 are “0”
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
01
30
Set the data, and press PAUSE
button.
button.
3
3
02
Check that the data changes to
“00”.
“00”.
4
3
03
Check that bit2, bit3 and bit6 are
“00”.
“00”.
(Note)
5
0
01
00
Set the data.
Note:
If bit2, bit3 or bit 6 of the data is “1”, there are errors.
For the error contents, see the following table. (For the bit values, refer
to “5-4. SERVICE MODE”, “4-3. 3. Bit value discrimination”. )
For the error contents, see the following table. (For the bit values, refer
to “5-4. SERVICE MODE”, “4-3. 3. Bit value discrimination”. )
Bit value of page: 3,
Error contents
address: 03
bit 2 = 1
PLL fo final adjustment is defective
bit 3 = 1
PLL fo final adjustment is defective
bit 6 = 1
LPF fo is defective
6. Hi8/Standard8 Switching Position Adjustment
(VC-250 Board)
If deviated in this case causes switching noise or jitter on the Hi8/
Standard8 mode played back screen.
Standard8 mode played back screen.
Mode
Playback
Signal
Hi8/Standard8 alignment tape:
For tracking adjustment
(WR5-1NP(NTSC))(WR5-1CP(PAL))
For tracking adjustment
(WR5-1NP(NTSC))(WR5-1CP(PAL))
Measurement Point
CH1: Pin 8 of CN933 (VC RF SWP)
CH2: Pin 5 of CN933 (PB RF)
CH2: Pin 5 of CN933 (PB RF)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
62, 63
Specified Value
t1=0 ± 10µ sec
Adjusting Method:
Order Page Address Data
Procedure
1
Set to the stop mode.
2
0
01
01
Set the data.
3
F
22
C0
Set the data, and press PAUSE
button.
button.
4
2
0E
02
Set the data.
5
Set to the playback mode.
6
F
62
Change the data and minimize
“t1”. (Coarse adjustment)
“t1”. (Coarse adjustment)
7
F
62
Press PAUSE button
8
F
63
Change the data and adjust so
that the switching position (t1)
becomes the specified value.
(Fine adjustment)
that the switching position (t1)
becomes the specified value.
(Fine adjustment)
9
F
63
Press PAUSE button
10
F
22
80
Set the data, and press PAUSE
button.
button.
11
2
0E
00
Set the data.
12
0
01
00
Set the data.
Fig. 5-3-7.
CH1
CH2
Enlargement
t1=0
±
10
µ
sec
CH1
CH2
5-24
7. CAP FG Offset Adjustment (VC-250 board)
Set the Cap FG signal duty cycle to 50% to establish an appropriate
capstan servo. If deviated, the uneven rotation of capstan and noise
can occur in the Hi8/Standard8 LP mode.
capstan servo. If deviated, the uneven rotation of capstan and noise
can occur in the Hi8/Standard8 LP mode.
Mode
Playback
Signal
Hi8/standard 8 alignment tape :
For checking operation
(WR5-5NSP(NTSC))
(WR5-5CSP(PAL))
For checking operation
(WR5-5NSP(NTSC))
(WR5-5CSP(PAL))
Measurement Point
Pin qg of CN933 (CAP FG)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
64
Specified value
Duty = 50 ± 1 %
Adjusting method:
Order Page Address Data
Procedure
1
Set to the stop mode.
2
0
01
01
Set the data.
3
2
0E
02
Set the data.
4
Set to the playback mode.
5
6
01
81
Set the data, and press PAUSE
button.
button.
6
3
02
Check that the data changes to
“01”.
“01”.
7
6
01
00
Set the data, and press PAUSE
button.
button.
8
Check that Duty of CAP FG
signal satisfies the specified
value. If not, repeat steps 5 to 8.
signal satisfies the specified
value. If not, repeat steps 5 to 8.
9
2
0E
00
Set the data.
10
0
01
00
Set the data.
Fig. 5-3-8.
A
B
Duty = A/B
×
100 [%]
Center of movement
5-25
3-5.
VIDEO SYSTEM ADJUSTMENTS
Switch setting:
DEMO MODE (Menu setting) ........................................ OFF
1. 27MHz Origin Oscillation Adjustment
(VC-250 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
Signal
Not required
Measurement Point
Pin 5 of IC1505
Measuring Instrument
Frequency counter
Adjustment Page
F
Adjustment Address
4D
Specified Value
f=13500000 ± 68Hz
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
F
4D
Change the data and set the
frequency (f) to the specified
value.
frequency (f) to the specified
value.
3
F
4D
Press PAUSE button.
4
0
01
00
Set the data.
2. Chroma BPF fo Adjustment (VC-250 Board)
Set the center frequency of IC3701 chroma band-pass filter.
Mode
VTR stop
Signal
No signal
Measurement Point
CH1: Chroma signal terminal of S
VIDEO OUT jack (75
VIDEO OUT jack (75
Ω
terminated)
CH2: Y signal terminal of S VIDEO
OUT jack (75
OUT jack (75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
28
Specified Value
A = 100mVp-p or less
B = 200mVp-p or more
B = 200mVp-p or more
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
D
11
10
Set the data, and press PAUSE
button.
button.
3
Check that the burst signal (B) is
output to the chroma signal
terminal of S VIDEO OUT jack.
output to the chroma signal
terminal of S VIDEO OUT jack.
4
3
0C
04
Set the data, and press PAUSE
button.
button.
5
C
28
Change the data for minimum
amplitude of the burst signal
level (A).
(The data should be “00” to
“07”.)
amplitude of the burst signal
level (A).
(The data should be “00” to
“07”.)
6
C
28
Press PAUSE button.
7
3
0C
00
Set the data, and press PAUSE
button.
button.
8
Check that the burst signal level
(B) satisfies the specified value.
(B) satisfies the specified value.
9
D
11
00
Set the data, and press PAUSE
button.
button.
10
0
01
00
Set the data.
When the data of page: 3, address: 0C, is 04:
When the data of page: 3, address: 0C, is 00:
Fig. 5-3-10.
CH1
CH2
A
H
CH1
H
B
Fig. 5-3-9.
VC-250 board
IC1505
8
5
1
4
5-26
3. S VIDEO OUT Y Level Adjustment (VC-250 Board)
Mode
VTR stop
Signal
No signal
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 ± 20mV
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
D
11
10
Set the data, and press PAUSE
button.
button.
3
3
0C
02
Set the data, and press PAUSE
button.
button.
4
C
25
Change the data and set the Y
signal level (A) to the specified
value.
signal level (A) to the specified
value.
5
C
25
Press PAUSE button.
6
3
0C
00
Set the data, and press PAUSE
button.
button.
7
D
11
00
Set the data, and press PAUSE
button.
button.
8
0
01
00
Set the data.
4. S VIDEO OUT Chroma Level Adjustment
(VC-250 Board)
Mode
VTR stop
Signal
No signal
Measurement Point
Chroma signal terminal of S VIDEO
OUT jack (75
OUT jack (75
Ω
terminated)
External trigger: Y signal terminal of
S VIDEO OUT jack
S VIDEO OUT jack
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
26, 27
Specified Value
Cr level:
A = 714 ± 14mV(NTSC)
A = 700 ± 14mV(PAL)
A = 700 ± 14mV(PAL)
Cb level:
B = 714 ± 14mV(NTSC)
B = 700 ± 14mV(PAL)
B = 700 ± 14mV(PAL)
Burst level: C = 286 ± 6mV(NTSC)
C = 300 ± 6mV(PAL)
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
D
11
10
Set the data, and press PAUSE
button.
button.
3
3
0C
02
Set the data, and press PAUSE
button.
button.
4
C
26
Change the data and set the Cr
signal level (A) to the specified
value.
signal level (A) to the specified
value.
5
C
26
Press PAUSE button.
6
C
27
Change the data and set the Cb
signal level (B) to the specified
value.
signal level (B) to the specified
value.
7
C
27
Press PAUSE button.
8
Check that the burst signal level
(C) is satisfied the specified
value.
(C) is satisfied the specified
value.
9
3
0C
00
Set the data, and press PAUSE
button.
button.
10
D
11
00
Set the data, and press PAUSE
button.
button.
11
0
01
00
Set the data.
Fig. 5-3-11.
Fig. 5-3-12.
H
Center of luminance line
A
H
C
A
0.28
µ
sec (NTSC)
0.23
µ
sec (PAL)
B
0.28
µ
sec (NTSC)
0.23
µ
sec (PAL)
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