5-46
3-3.
SERVO AND RF SYSTEM ADJUSTMENT
Before perform the servo and RF system adjustments, check that
the specified value of “54/66MHz Origin Oscillation Adjustment”
of “VIDEO SYSTEM ADJUSTMENT” is satisfied.
Adjusting Procedure:
1.
REEL FG adjustment
2.
PLL fo & LPF fo pre-adjustment
3.
Switching position adjustment
4.
AGC center level and APC & AEQ adjustment
5.
PLL fo & LPF fo fine adjustment
6.
Hi8/Standrd8 switching position adjustment
7.
CAP FG offset adjustment
1. REEL FG Adjustment (VC-262 board)
Compensates the dispersion of the hall elements.
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
17, 30
Specified Value
00 or 01 or 04 or 05
Adjusting method:
Order Page Address Data
Procedure
1
Close the cassette compartment
without inserting a cassette.
2
0
01
01
Set the data.
3
3
01
1C
Set the data, and press PAUSE
button.
4
3
02
Check that the data changes to
“00”,
5
3
03
Check that the data is “00” or
“01” or “04” or “05”. (Note)
6
0
01
00
Set the data.
Note:
If the data is other value, adjustment has errors. (Take an appropriate
remedial measures according to the errors referring to the following
table.)
Data
Contents of defect
02, 03, 06, 07
T reel is defective
08, 09, 0C, 0D
S reel is defective
0A, 0B, 0E, 0F
S reel and T reel are defective
2. PLL fo & LPF fo Pre-Adjustment (VC-262 board)
Mode
VTR stop
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
00
Set the data, and press PAUSE
button.
3
3
01
30
Set the data, and press PAUSE
button.
4
3
02
Check that the data changes to
“00” within 10 sec. (Note)
5
3
03
Check that the data is “00”. (Note)
6
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 5.
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”.)
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
RadarW
RadarW
RadarW
