GV-D200 - Sony VCR Service Manual (repair manual). Page 114

5-24

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
(WR5-5NSP(NTSC))
(WR5-5CSP(PAL))

Measurement Point

Pin qg of CN933 (CAP FG)

Measuring Instrument

Oscilloscope

Adjustment Page

F

Adjustment Address

64

Specified value

Duty = 50 ± 1 %

1

Set to the stop mode.

2

0

01

01

Set the data.

3

2

0E

02

Set the data.

4

Set to the playback mode.

5

6

01

81

Set the data, and press PAUSE
button.

6

3

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

0E

00

Set the data.

10

0

01

00

Set the data.

Fig. 5-3-8.

A

B

Duty = A/B 

×

 100 [%] 

Center of movement