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5-49
5. PLL fo & LPF fo Fine Adjustment (VC-262 board)
Mode
VTR stop
Signal
Arbitrary
Measurement Point
Display data of page: 3
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
1F, 20, 22, 29
Specified Value
The data of page: 3, address: 02 is “00”.
The data of page: 3, address: 03 is “00”.
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.
3
3
02
Check that the data changes to
“00” within 10 sec. (Note1)
4
3
03
Check that the data is “00”.
(Note2)
5
0
01
00
Set the data.
Note1:
If it is not satisfied, there are errors.
Note2:
If the data is other than “00”, 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”.)
Bit value of page: 3,
Error contents
address: 03
bit 2 = 1 or bit 3 = 1
PLL fo fine adjustment is defective
bit 4 = 1 or bit 5 = 1
PLL fo adjustment is defective
bit 6 = 1
LPF fo is defective
6. Hi8/Standard8 Switching Position Adjustment
(VC-262 board)
If deviated in this case causes switching noise or jitter on the Hi8/
Standard8 mode played back screen.
Mode
Playback
Signal
Hi8/Standard8 alignment tape:
For tracking adjustment
(WR5-1NP (NTSC)),
(WR5-1CP (PAL))
Measurement Point
CH1: Pin
8
of CN1108 (VC RF SWP)
CH2: Pin
5
of CN1108 (PB RF)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
62, 63
Specified Value
t1=0 ± 10
µ
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.
4
2
2E
02
Set the data.
5
Set to the playback mode.
6
F
62
Change the data and minimize
“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)
9
F
63
Press PAUSE button
10
F
22
80
Set the data, and press PAUSE
button.
11
2
2E
00
Set the data.
12
0
01
00
Set the data.
Fig. 5-3-6.
CH1
CH2
Enlargement
t1=0
±
10
µ
sec
CH1
CH2
RadarW
RadarW
RadarW
RadarW
RadarW
RadarW