Sony Handycam Vision CCD-TRV66E, Service Manual

Page: 117 / 166

5-35
3-3. SERVO SYSTEM ADJUSTMENTS
1. CAP FG Offset Adjustment (VC-214 board)
Improve the capstan servo characteristic. If it is not correct. jitters
will increase.
Mode Camera recording (SP mode)
Subject Arbitrary
Measurement Point Pin
!™
of CN910 (CAP FG)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 61
Specified value Duty = 50 ± 1 %
Adjusting method:
1)
Set to the Camera recording mode (SP mode).
2) Select page: 0, address: 01, and set data: 01.
3) Select page: 6, address: 01, set data: 81, and press the PAUSE
button of the adjustment remote commander. (to start up
automatic CAP FG offset adjustment.)
4) Select page: 6, address: 02, and check that the data is “01”.
5) Check that Duty of CAP FG signal satisfies the specified value.
If not, select page: 6, address: 01, set data: 00, and press the
PAUSE button, and then, repeat steps 1) to 5).
6) Select page: 6, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.
7) Select page: 0, address: 01, and set data: 00.
2. Switching Position Adjustment (VC-214 board)
If deviated in this case causes switching noise or jitter on the played
back screen.
Mode Playback
Signal Alignment tape:
For tracking adjustment
(WR5-1CP)
Measurement Point CH1: Pin
!¡
of CN910 (RF SWP)
CH2: Pin
6
of CN910 (PB RF)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 3E, 3F
Specified Value t1 = 0 ± 10
µ
sec
Adjusting Method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 2C, set data: 20, and press the PAUSE
button of the adjustment remote commander.
3) Select page: F, address: 3E, change the data and minimize “t1”,
and then press the PAUSE button of the adjustment remote
commander. (Coarse adjustment)
4) Select page: F, address: 3F, change the data and adjust so that
the switching position (t1) becomes the specified value. (Fine
adjustment)
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: F, address: 2C, set data: 00, and press the PAUSE
button of the adjustment remote commander.
7) Select page: 0, address: 01, and set data: 00.
A
B
Duty = A/B
×
100 [%]
Center of movement
CH1
CH2
Enlargement
t1=0
±
10
µ
sec
CH1
CH2
Fig. 5-3-5.
Fig. 5-3-6.