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3-3.
SERVO AND RF SYSTEM ADJUSTMENTS
2. PLL f
0
& LPF f
0
Pre-adjustment (VC-235 board)
(Service manual page 5-48)
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
Data of page: 3, address: 02 is
changed to “00” within 10 seconds,
and data of page: 3, address: 03 is
“00”
changed to “00” within 10 seconds,
and data of page: 3, address: 03 is
“00”
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 30, and press the PAUSE
2) Select page: 3, address: 01, set data: 30, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 02, and check that the data changes to
“00” within 10 seconds.
Note:
If it takes more than 10 seconds for changing data, there
are some errors.
are some errors.
4) Select page: 3, address: 03, and check that the data is “00”.
Note:
If data is not “00”, there are some errors. For the error
contents, see the following table. (For the bit values, refer
to “5-4. SERVICE MODE”, “4-3. 3. Bit value dis-
crimination”)
contents, see the following table. (For the bit values, refer
to “5-4. SERVICE MODE”, “4-3. 3. Bit value dis-
crimination”)
Bit value of page: 3,
Error contents
address: 03
bit 6 = 1
LPF f
0
adjustment is defective
bit 2 = 1 or bit3 = 1
PLL f
0
, fine adjustment is defective
bit 4 = 1 or bit5 = 1
PLL f
0
, adjustment is defective
If it takes more than 10 seconds for changing data of page: 3,
address: 02, or any of bit value from bit 2 to bit 5 of page: 3,
address: 03 is “1”, select page: C, address: 21, set the follow-
ing data, and press the PAUSE button, and repeat steps 2) to
4).
address: 02, or any of bit value from bit 2 to bit 5 of page: 3,
address: 03 is “1”, select page: C, address: 21, set the follow-
ing 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
5) Select page: 0, address: 01, and set data: 00.
\
3-2.
SYSTEM CONTROL SYSTEM ADJUSTMENT
2-2. Input of Serial No.
(Service manual page 5-45)
10) Enter H
4
to address: EF on page: C.
Example: If H
4
= 39,
select page: C, address: EF, and set data: 39, then press the
PAUSE button.
PAUSE button.
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