Sony DCR-TRV103 Service Manual page 143

7. CAP FG Offset Adjustment (VC-213 board)
Improve the capstan servo characteristic. If it is not correct. jitters
will increase.
Mode Playback
Signal Hi8/standard 8mm alignment tape :
For checking operation
(WR5-5NSP(NTSC))
(WR5-5CSP(PAL))
Pin !∞ of CN910 (CAP FG)
Measurement Point
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 61
Specified value Duty = 50 ± 1 %
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 2E, and set data: 02.
3) Set to the playback mode.
4) 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.)
5) Select page: 6, address: 02, and check that the data is "01".
6) 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 4) to 6).
7) Select page: 6, address: 01, set data: 00, and press the PAUSE
button.
8) Select page: 2, address: 2E, and set data: 00.
9) Select page: 0, address: 01, and set data: 00.
Center of movement
A
B
Fig. 5-3-8.
Duty = A/B × 100 [%]
5-54