Sony Handycam DCR-TRV230E, Service Manual

Page: 189 / 242

5-48
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 Procedure
1 Set to the stop mode.
2 0 01 01 Set the data.
3 2 2E 02 Set the data.
4 Set to the playback mode.
5 6 01 81 Set the data, and press PAUSE
button.
6 6 02 Check that the data changes to
“01”.
7 6 01 00 Set the data, and press PAUSE
button.
8 Check that Duty of CAP FG
signal satisfies the specified
value. If not, repeat steps 5 to 8.
9 2 2E 00 Set the data.
10 0 01 00 Set the data.
Fig. 5-3-7.
A
B
Duty = A/B
×
100 [%]
Center of movement