CCD-TR913E, CCD-TR950E - Sony Movie Service Manual (repair manual). Page 114

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5-34
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.
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