Read Sony DCR-TRV738E / DCR-TRV740 / DCR-TRV740E / DCR-TRV840 (serv.man2) Service Manual online
5-52
DCR-TRV738E/TRV740/TRV740E/TRV840
5. PLL f
0
& LPF f
0
Fine Adjustment (VC-278 board)
Mode
VTR stop
Signal
Arbitrary
Measurement Point
Display data of page: 3, address: 02, 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
1F, 20, 22, 29
Specified Value
Display data of page: 3, address: 02 is
“00”.
Display data of page: 3, address: 03 is
“00”.
“00”.
Display data of page: 3, address: 03 is
“00”.
Note1:
The data of page: 0, address: 10 must be “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” with in 10 sec. (Note2)
“00” with in 10 sec. (Note2)
4
3
03
Check that the data is “00”.
(Note3)
(Note3)
5
0
01
00
Set the data.
Note2:
If it isn’t satisfied, there are errors.
Note3:
If the data of page: 3, address: 03 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”.)
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”.)
6. Hi8/Standard8 Switching Position Adjustment
(VC-278 board)
If deviated in this case causes switching noise or jitter on the Hi8/
Standard8 mode played back screen.
Standard8 mode played back screen.
Mode
Playback
Signal
Hi8/Standard8 alignment tape:
For tracking adjustment
(WR5-1NP (NTSC), WR5-1CP (PAL))
For tracking adjustment
(WR5-1NP (NTSC), WR5-1CP (PAL))
Measurement Point
CH1: Pin 8 of CN1108 (RF SWP)
CH2: Pin 5 of CN1108 (PB RF)
CH2: Pin 5 of CN1108 (PB RF)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
40, 41
Specified Value
t1 = 0 ± 10
µsec
Note1:
The data of page: 0, address: 10 must be “00”.
Adjusting Method:
Order Page Address Data
Procedure
1
Set to the stop mode.
2
0
01
01
Set the data.
3
C
3E
40
Set the data, and press PAUSE
button.
button.
4
7
62
02
Set the data.
5
Set to the playback mode.
6
C
40
Change the data and minimize
“t1”. (Coarse adjustment)
“t1”. (Coarse adjustment)
7
C
40
Press PAUSE button
8
C
41
Change the data and adjust so that
the switching position (t1)
becomes the specified value. (Fine
adjustment)
the switching position (t1)
becomes the specified value. (Fine
adjustment)
9
C
41
Press PAUSE button
10
C
3E
00
Set the data, and press PAUSE
button.
button.
11
7
62
00
Set the data.
12
0
01
00
Set the data.
Fig. 5-3-5.
CH1
CH2
Enlargement
t1=0
±
10
µ
sec
CH1
CH2
Bit value of page: 3,
Error contents
address: 03
bit 2 = 1 or bit 3 = 1
PLL f
0
fine adjustment is defective
bit 4 = 1 or bit 5 = 1
PLL f
0
adjustment is defective
bit 6 = 1
LPF f
0
adjustment is defective
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