Sony DNW-A100 Maintenance Manual page 480

7-1-3. Video Tracking Check and Adjustment
11. REW Mode to PLAY Mode
(1) Play back the SR2-1/P (00:00 to 15:00).
(2) Put the unit into the REW mode once. Two or
three seconds later, put the unit into the
PLAY mode.
Check that the RF envelope waveform
satisfies the specification 8.
. In case of the waveform become A, B or C
Check that the output level (b) is more
than 70% of the level in normal PLAY
mode (a) and returns it to the level in
normal PLAY mode within 1 second after
servo locks up. (Spec. 9)
If specification 9 is not satisfied in
waveform A or B shown in the figure,
check the tape running at the tape
approaching side. (Refer to Section 7-1-2.)
If specification 9 is not satisfied in
waveform C shown in the figure, check the
tape running at the tape leaving side.
(Refer to Section 7-1-2.)
7-20
. Alignment tape : SR2-1/SR2-1P (00:00 to 15:00)
(Tracking VR : Not effective)
Spec.8: The RF envelope waveform returns to the
maximum level with the even level within
1 second after servo locks up.
(Servo indicator on control panel lights up)
Waveform A
a
b
Waveform C
b
Spec.9: The output level (b) is more than 70% of
the level in normal PLAY mode (a) and
returns it to the level in normal PLAY
mode within 1 second after servo locks up.
Video Tracking Check (REW 8
(OK)
Waveform B
b
a
8 8
8 PLAY) 8
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
a