7-15
DVW-250/250P
2. S1 guide slantness adjustment
(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 upper flange of the S2 guide counterclock-
wise, and adjust the height so that the tape runs
without contacting the upper and lower flanges of the
S2 guide.
(3) Adjust the slantness of the S1 guide so that the enve-
lope waveform meets the specification.
Perform the S1 guide slantness adjustment as follows.
(4) Eject the alignment tape and insert it and play back
again.
(5) Check that the envelope waveform A meets the
specification.
If not, perform the steps (3) and later.
(6) Tighten the set screws
a
and
b
.
Tightening torque:
0.1
±
0.015 N • m (0.8
±
0.15 kgf • cm)
3. S1 guide slantness check
Repeat the mode change from EJECT mode to PLAY
mode 3 times. Check that the envelope waveform A meets
the specification.
If not, perform step 1) and later again.
A
Enverope waveform
A = 2.5 ±1.5 ms
Spec :
S1 guide
Screw
a
Screw
b
• To lengthen the A
(1) At first , loosen the screw
b
.
(2) And then, tighten the screw
a
.
• To shorten the A
(1) At first , loosen the screw
a
.
(2) And then, tighten the screw
b
.
7-2-5. S1 Guide Slantness Adjustment