Servo And Rf System Adjustment; Cap Fg Duty Adjustment (Vc-264 Board); Pll Fo & Lpf Fo Adjustment (Vc-264 Board) - Sony DCR-TRV30E Service Manual

3-3.

SERVO AND RF SYSTEM ADJUSTMENT

Before perform the servo and RF system adjustments, check that
the specified value of "40.5 MHz / 54 MHz Origin Oscillation
Adjustment" of "CAMERA SYSTEM ADJUSTMENT" is satisfied.
Adjusting Procedure:
1. Cap FG duty adjustment
2. PLL f & LPF f adjustment
0 0
3. Switching position adjustment
4. AGC center level
5. APC & AEQ adjustment
6. PLL f & LPF f fine adjustment
0 0

1. Cap FG Duty Adjustment (VC-264 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
1
2 0 01 01
3 3 01 1B
4 3 02
5 3 03
6 0 01 00
Note: If the data is "01", adjustment has errors or the mechanism deck is
defective.
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Procedure
Close the cassette compartment
without inserting a cassette.
Set the data.
Set the data, and press PAUSE
button.
Check that the data changes in
the following order.
"1B" → "2B" → "00"
Check that the data is "00".
(Note)
Set the data.
2. PLL fo & LPF fo Adjustment (VC-264 Board)
Mode
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 3 01
3 3 01
4 3 02
5 3 03
6 0 01
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.
When the data of page: C, address: 21 is "CA".
When the data of page: C, address: 21 is "CE".
When the data of page: C, address: 21 is "C6".
When the data of page: C, address: 21 is "D2"
There are errors when it isn't satisfied even if the above treatment is
done.
If bit2, bit3, bit4, bit5 or bit 6 of the data of page: 3, address: 03 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,
address: 03 data
bit 2 = 1 or bit 3 = 1
bit 4 = 1 or bit 5 = 1
bit 6 = 1
5-46
VTR stop
Display data of page: 3, address: 02,
03
Adjustment remote commander
C
1F, 20, 22, 29
Data of page: 3, address: 02 is "00".
Data of page: 3, address: 03 is "00".
Procedure
01 Set the data.
00 Set the data, and press PAUSE button.
30 Set the data, and press PAUSE button.
Check that the data changes to
"00" with in 5 sec. (Note)
Check that the data is "00".
(Note)
00 Set the data.
Setting data
Error contents
PLL fo fine adjustment is defective
PLL fo adjustment is defective
LPF fo is defective
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CE
C6
D2
C2