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5-46
3-3.
SERVO SYSTEM ADJUSTMENTS
1. CAP FG Offset Adjustment (VC-215 board)
Improve the capstan servo characteristic. If it is not correct. jitters
will increase.
will increase.
Mode
Camera recording (SP mode)
Subject
Arbitrary
Measurement Point
Pin
!™ of CN910 (CAP FG)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
69
Specified value
Duty = 50±0.5%
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 01, and set data: 81, and press the PAUSE
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 01, and set data: 81, and press the PAUSE
button of the adjustment remote commander. (to start up
automatic CAP FG offset adjustment.)
automatic CAP FG offset adjustment.)
3) Select page: 2, address: 02, and check that the data is “01”.
4) Check that Duty of CAP FG signal satisfies the specified value.
4) Check that Duty of CAP FG signal satisfies the specified value.
If not, select page: 2, address: 01, set data: 00, and press the
PAUSE button, and then, repeat steps 2) to 4).
PAUSE button, and then, repeat steps 2) to 4).
5) Select page: 2, address: 01, and set data: 00, and press the PAUSE
button of the adjustment remote commander.
6) Select page: 0, address: 01, and set data: 00.
2. RF Switching Position Adjustment (VC-215 Board)
If deviated in this case causes switching noise or jitter on the played
back screen.
back screen.
Mode
Playback
Signal
Alignment tape:
For tracking adjustment
WR5-1NP
WR5-1NP
Measurement Point
CH1: Pin
!¡ of CN910 (RF SWP)
CH2: Pin
6 of CN910 (PB RF)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
7C (upper digits), 7D (lower digits)
Specified Value
t1 = 0±10µsec
Adjusting Method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 2A, and set data: 20, and press the PAUSE
1) Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 2A, and set data: 20, and press the PAUSE
button of the adjustment remote commander.
3) Select page: F, address: 7C, change the data and minimize “t1”,
and then press the PAUSE button of the adjustment remote
commander. (Coarse adjustment)
commander. (Coarse adjustment)
4) Select page: F, address: 7D, change the data and adjust so that
the switching position (t1) becomes the specified value. (Fine
adjustment)
adjustment)
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: F, address: 2A, and set data: 00, and press the PAUSE
6) Select page: F, address: 2A, and set data: 00, and press the PAUSE
button of the adjustment remote commander.
7) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-5.
Fig. 5-3-6.
