Sony Betacam SX DNV-5 Maintenance Manual page 189

Confirmation
1. Alignment tape playback
Play back the tape top portion (01:00 to 15:00) of
the alignment tape SR2-1/1P.
2. TC head position confirmation
(1) Confirm that the phase difference at the
falling and rising edges of a CTL pulse
satisfies the specifications.
If the specifications are not satisfied, perform
steps 3 and later.
(2) Repeat the mode selection of EJECT to
PLAY two or three times. At that time,
confirm that the specifications are satisfied.
If the specifications are not satisfied, perform
steps 3 and later.
(3) Repeat the mode selection of REV x5 to
PLAY two or three times. At that time,
confirm that the specifications are satisfied.
If the specifications are not satisfied, perform
steps 3 and later.
Entering the REV x x x x x 5 mode
Press the PLAY button, then the REW
button.
(Both the PLAY and REW buttons on the
keyboard light.)
Adjustment
3. TC head position adjustment
Turn the position adjustment nut of the TC head
using a box screwdriver and adjust so that the
specifications are satisfied.
. Turn the adjustment nut counterclockwise. The
TC waveform then moves to the right.
. Turn the adjustment nut clockwise. The TC
waveform then moves to the left.
4. TC head position reconfirmation
Reconfirm the TC head position according to
steps 1 and 2.
5. TC head height confirmation
(Refer to section 4-2-5.)
DNV-5
DNW-7/90/90WS
NTSC
CH1 SHAPED
65
CTL WAVEFORM
50
CH2
TC WAVEFORM
TRIG SERVO
CF WAVEFORM
Specifications : A = 0 ±600 µs
PAL
CH1 SHAPED
65
CTL WAVEFORM
35
CH2 TC
WAVEFORM
TRIG SERVO
CF WAVEFORM
DNV-5 Specifications : A = 6.63 ±0.6 ms
DNW-7 / 7P / 90 / 90P /
Specifications : A = 0 ±600 µs
90WS / 90WSP
4-2-6. TC Head Position Adjustment
TC head
Position adjustment nut
Alighnment tape
50 50 50 65
A
50 65 50 50
50 50 50 35
A
50 50
50
65
50
4-31