7-26
DVW-250/250P
2. Tracking check
(1) Turn the tracking control volume using a screwdriver
so that the output level at the center of the envelope
waveform is the maximum.
(2) Turn the tracking control volume clockwise so that the
output level at the center of the envelope waveform is
80 % of the maximum amplitude.
(3) Check that the envelope waveform meets the specifi-
cation 1.
(4) Check that the envelope waveform meets the specifi-
cation 2.
3. Tracking check in the upright position
(1) Put the unit into the upright position.
(2) Check that the specifications 1 and 2 are met.
If the specification 1 and/or 2 is not met in the steps 2 and
3, perform the adjustment from “7-2-5. S1 Guide Slantness
Adjustment” and later again.
4. Start-up time check
(1) Play back the alignment tape ZR2-1/1P (from 5:00 to
15:00).
(2) Turn the tracking control volume using a screwdriver
so that the output level at the center of the envelop
waveform is the maximum.
(3) Put the unit into EJECT mode once.
(4) Put the unit into threading mode, and press the PLAY
button.
(5) Push the PAUSE button to be pause mode the unit,
press the PAUSE button again.
(6) Check that the start-up time of the envelope waveform
is within 1 sec likes shown in figure and the tape curl
at the lead portion disappears within 0.5 sec.
(7) Put the unit into REV
×
2 mode.
After several seconds, put the unit into PLAY mode.
Check that the start-up time of the waveform is within
1 sec likes shown in figure.
(8) Perform steps (4) to (6) three times.
7-2-10. Alignment Tape Tracking Check
Pause or REV
×
2 mode
Play mode
OK
NG
C'
C
A
B
B'
A'
B'
B
×
100
≥
90%(Fluctuation at drum entrance side)
C'
C
×
100
≥
90%(Fluctuation at drum exit side)
A'
A
×
100
≥
90%(Fluctuation at maximum output)
C
D
A
B
B
A
×
100
≥
80%(Drum at entrance side)
C
A
×
100
≥
80%(Drum at exit side)
D
A
×
100
≥
80%(D is minimum point of waveform)
