5-67
3-3.
SERVO AND RF SYSTEM ADJUSTMENT
Before perform the servo and RF system adjustments, check that
the specified value of “27 MHz Origin Oscillation Adjustment” of
“CAMERA SYSTEM ADJUSTMENT” is satisfied.
Adjusting Procedure:
1.
Cap FG duty adjustment
2.
PLL f
0
& LPF f
0
adjustment
3.
Switching position adjustment
4.
AGC center level
5.
APC & AEQ adjustment
6.
PLL f
0
& LPF f
0
final adjustment
1. Cap FG Duty Adjustment (VI-156 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.
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
16
Specified Value
00
Adjusting method:
Order Page Address Data
Procedure
1
Eject the cassette.
2
0
01
01
Set the data.
3
3
01
1B
Set the data, and press PAUSE
button.
4
3
02
Check that the data changes in
the following order.
“1B”
→
“2B”
→
“00”
5
3
03
Check that the data is “00”.
(Note)
6
0
01
00
Set the data.
7
Press EJECT button.
Note:
If the data is “01”, adjustment has errors or the mechanism deck is
defective.
2. PLL f
0
& LPF f
0
Adjustment (VI-156 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
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.
3
3
02
Check that the data changes to
“00”.
4
3
03
Check that the data is “00”.
(Note)
5
0
01
00
Set the data.
Note:
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 data
bit 6 = 1
LPF f
0
is defective
bit 3 = 1
PLL f
0
final adjustment is defective
bit 2 = 1
PLL f
0
final adjustment time-out
Содержание DSR-250
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Страница 284: ...ELECTRONIC VIEWFINDER DXF 801 DXF 801CE SERVICE MANUAL Attached Manual ...
Страница 308: ...6 1 DXF 801 801CE MAIN MAIN COMPONENT SIDE Section 6 Board Layouts MAIN SOLDERING SIDE ...
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Страница 311: ...Sony EMCS Co DSR 250 250P 388 9 929 845 12 2001K1600 1 2001 11 Published by DI Customer Center ...
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Страница 321: ...DSR 250 250P Sony EMCS Co 9 929 845 82 2003A1600 1 2003 1 Published by DI Customer Center ...