Sony GV-D200E, Service Manual

Page: 113 / 166

5-23
5. PLL fo & LPF fo Final Adjustment (VC-250 Board)
Mode VTR stop
Signal Arbitrary
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 bit2, bit3 and bit6 are
“00”.
(Note)
5 0 01 00 Set the data.
Note:
If bit2, bit3 or bit 6 of the 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
bit 2 = 1 PLL fo final adjustment is defective
bit 3 = 1 PLL fo final adjustment is defective
bit 6 = 1 LPF fo is defective
6. Hi8/Standard8 Switching Position Adjustment
(VC-250 Board)
If deviated in this case causes switching noise or jitter on the Hi8/
Standard8 mode played back screen.
Mode Playback
Signal Hi8/Standard8 alignment tape:
For tracking adjustment
(WR5-1NP(NTSC))(WR5-1CP(PAL))
Measurement Point CH1: Pin
8
of CN933 (VC RF SWP)
CH2: Pin
5
of CN933 (PB RF)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 62, 63
Specified Value t1=0 ± 10
µ
sec
Adjusting Method:
Order Page Address Data Procedure
1 Set to the stop mode.
2 0 01 01 Set the data.
3 F 22 C0 Set the data, and press PAUSE
button.
4 2 0E 02 Set the data.
5 Set to the playback mode.
6 F 62 Change the data and minimize
“t1”. (Coarse adjustment)
7 F 62 Press PAUSE button
8 F 63 Change the data and adjust so
that the switching position (t1)
becomes the specified value.
(Fine adjustment)
9 F 63 Press PAUSE button
10 F 22 80 Set the data, and press PAUSE
button.
11 2 0E 00 Set the data.
12 0 01 00 Set the data.
Fig. 5-3-7.
CH1
CH2
Enlargement
t1=0
±
10
µ
sec
CH1
CH2