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5-41
3. PLL fo & LPF fo Pre-Adjustment (VC-256 Board)
Mode
VTR stop
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
The data of page: 3, address: 02 is “00”.
The data of page: 3, address: 03 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.
button.
3
3
02
Check that the data changes to
“00” within 10 sec. (Note)
“00” within 10 sec. (Note)
4
3
03
Check that the data is “00”. (Note)
5
0
01
00
Set the data.
Note:
If it isn’t satisfied, select page: C, address: 21, set the following
data, and press the PAUSE button, and repeat steps 2 to 4.
data, and press the PAUSE button, and repeat steps 2 to 4.
Setting data
When the data of page: C, address: 21 is “CA”.
CE
When the data of page: C, address: 21 is “CE”.
C6
When the data of page: C, address: 21 is “C6”.
D2
When the data of page: C, address: 21 is “D2”
C2
If bit2, bit3, bit4, bit5 or bit6 of page: 3, address: 03 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”.)
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 data
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
4. Switching Position Adjustment (VC-256 Board)
To obtain normal playback waveform output during the Digital8
playback mode, adjust the switching position.
playback mode, adjust the switching position.
Mode
VTR playback
Signal
SW/OL reference tape (WR5-2D)
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
10, 11, 12, 13
Specified Value
00
Adjusting method:
Order Page Address Data
Procedure
1
Insert the SW/OL reference tape
and enter the VTR STOP mode.
and enter the VTR STOP mode.
2
0
01
01
Set the data.
3
3
21
Check that the data is “02”.
(Note1)
(Note1)
4
3
01
0D
Set the data, and press PAUSE
button.
button.
5
3
02
Check that the data changes to
“00”.
“00”.
6
3
03
Check that the data is “00”.
(Note2)
(Note2)
7
C
10
Check that the data is “00” to “E6”.
(Note3)
(Note3)
8
0
01
00
Set the data.
Note 1:
If the data of page: 3, address: 21 is “72”, the tape top being played.
After playing the tape for 1 to 2 seconds, stop it, perform step 4
and higher.
After playing the tape for 1 to 2 seconds, stop it, perform step 4
and higher.
Note 2:
If bit 0 of the data is “1”, the A channel is defective. If bit 1 is “1”,
the B channel is defective. Contents of the defect is written into
page: C, addresses: 10 and 12. See the following table. (For the bit
values, refer to “5-4. SERVICE MODE”, “4-3. 3. Bit value
discrimination”. ) If bit3 of the data is “1”, the tape end being
played, and adjustment has errors.
the B channel is defective. Contents of the defect is written into
page: C, addresses: 10 and 12. See the following table. (For the bit
values, refer to “5-4. SERVICE MODE”, “4-3. 3. Bit value
discrimination”. ) If bit3 of the data is “1”, the tape end being
played, and adjustment has errors.
Note 3:
If the data is “E7” to “FF”, adjustment has errors.
When the A channel is defective
Data of page:C,
Contents of defect
address:10
EE
Writing into EEPROM (IC4502) is
defective
defective
E8
Adjustment data is out of range
E7
No data is returned from IC3301
(CAIN)
(CAIN)
When the B channel is defective
Data of page:C,
Contents of defect
address:12
E8
Adjustment data is out of range
E7
No data is returned from IC3301
(CAIN)
(CAIN)
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