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VL-PDl U
8-4. Running rough adjustment
(Since this adjustment
is performed without cassette controller,
put a proper weight so that the cassette does not rise ,
and make an adjustment.)
Adjustment
item
1) Su, Tu guide roller height adjustment
Method and description
(l)Loosen
the guide roller lock screw, then tighten loosely so that
the roller turns easily.
Turn to 180"
a
c
T roller
(2)Replay an alignment tape, and adjust the Su, Tu guide roller so
that the envelope sides of entrance
and exit are flat.
(3)Perform
a l/4 shift, then, as in the above case, adjust until the
envelope
becomes flat.
*
If running is difficult for the entrance changed, turn the T roller to
180". (refer to Fig. 1)
2) Check of V&R envelope wave form
(l)Confirm
that the envelope waveform
peaks in V/SR mode are
uniform.
(2)lf they are not uniform, fine-adjust
the guide roller and the Tu
guide.
1
A
Adjust so that A $ B.
B
3) Check of tape wrinkles
(l)Make
sure that the S guide flange tape is free from creases
in the PB mode and V/SR mode.
elf
crease is found, make an adjustment
in the range of f180°.
@After adjustment
apply Screw Lock.
(2)Check that the tape is not distorted
between the Tu guide and
pinch in the PB mode and the V/SR mode.
Qlf crease is found, make an adjustment
in the range of t180".
QAfter
adjustment
apply Screw Lock.
Deformation
T roller
Pinch roller
Wrinkles
~
Tu guide
\
0
//
Deformation
'q
//
'Deformation
4) Check the rising time of the envelope
wave
form
(1)Check the rising time of the envelope when switching
from V/
SR mode to PB mode. (Within 5 set)
(2)Check
the rising time of the envelope
when switching
from
STOP mode to PB mode. (Within 5 set)
83 I
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