Sony DCR-TRV230E Service Manual page 189

7. CAP FG Offset Adjustment (VC-254 board)
Set the Cap FG signal duty cycle to 50% to establish an appropriate
capstan servo. If deviated, the uneven rotation of capstan and noise
can occur in the Hi8/Standard8 LP mode.
Mode Playback
Signal Hi8/standard 8 alignment tape :
For checking operation
(WR5-5CSP)
Measurement Point Pin qg of CN1108 (CAP FG)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 64
Specified value Duty = 50 ± 1 %
Adjusting method:
Order Page Address Data
1
2 0 01 01
3 2 2E 02
4
5 6 01 81
6 6 02
7 6 01 00
8
9 2 2E 00
10 0 01 00
Center of movement
A
B
Fig. 5-3-7.
Procedure
Set to the stop mode.
Set the data.
Set the data.
Set to the playback mode.
Set the data, and press PAUSE
button.
Check that the data changes to
"01".
Set the data, and press PAUSE
button.
Check that Duty of CAP FG
signal satisfies the specified
value. If not, repeat steps 5 to 8.
Set the data.
Set the data.
Duty = A/B × 100 [%]
5-48